Transmission method for optical communication and related device

Abstract

The embodiment of the invention provides a data transmission method for optical communication and a related device. Specifically, a transmitting end acquires a superframe comprising a plurality of subframes, the subframes comprising pilot symbols. Wherein, in one polarization direction, the number NPS of pilot symbols in the subframe is an even number greater than 0. Each pilot symbol is one of four complex numbers, namely-A-Aj,-A + Aj, A-Aj and A + Aj, and A is a real number. Each continuous NPG symbols in the subframe comprises one pilot symbol located at a fixed position. The superframe comprises a first type of subframe, the first type of subframe further comprises NFAW frame synchronization symbols, and each frame synchronization symbol is one of four complex numbers of-A-Aj,-A + Aj, A-Aj and A + Aj. One symbol in the first type of subframes is both a pilot symbol and a frame synchronization symbol, and the NFAW is an odd number. And further, the transmitting end transmits the superframe. It should be understood that there is no training symbol in the subframe, which has lower redundancy and simplifies the structure of the subframe.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of optical communications, and in particular, to a transmission method and related devices for optical communications. Background Art

[0002] Driven by 5G, cloud computing, big data, and artificial intelligence, high-speed optical transmission networks are developing in the direction of large capacity, packetization, and intelligence. Coherent optical communication systems use the amplitude, phase, polarization, and frequency of light waves to carry information. In order to combat optical signal distortion caused by dispersion, polarization-related damage, noise, nonlinear effects, and other factors during transmission and maintain long-distance transmission, coherent optical communication systems usually add some designed fixed symbol sequences to the transmission symbol sequence to facilitate the receiver to recover the transmitted symbols.

[0003] The existing transmission symbol sequence is mainly used in 400Gbps or 800Gbps scenarios, and cannot adapt to future scenarios above 800Gbps (including 1.2Tbps, 1.6Tbps, etc.), and the transmission redundancy is large. Summary of the invention

[0004] The embodiments of the present application provide a transmission method and related devices for optical communication, which solve the problem that the transmission symbol sequence of the prior art cannot be applied to scenarios above 800 Gbps.

[0005] In a first aspect, an embodiment of the present application provides a transmission method for optical communication, which is applied to a transmitting end. Specifically, the transmitting end obtains a superframe including a plurality of subframes, wherein the subframe includes a pilot symbol. In one polarization direction, the number of pilot symbols in the subframe is N PS is an even number greater than 0. Each pilot symbol is one of the four complex numbers -A-Aj, -A+Aj, A-Aj and A+Aj, where A is a real number. PG The symbols include a pilot symbol located at a fixed position. The superframe includes a first-type subframe, and the first-type subframe also includes N FAW frame synchronization symbols, each of which is one of the four complex numbers -A-Aj, -A+Aj, A-Aj and A+Aj. In the first type of subframe, there is a symbol that is both a pilot symbol and a frame synchronization symbol, N FAWis an odd number. Then, the transmitting end sends a superframe. It should be noted that the method can also be applied to a specific module in the transmitting end, for example, a signal processor of the transmitting end. It should be understood that the module obtaining the superframe can be understood as the superframe generated by the module itself, or it can be understood as the module receiving the superframe sent from its preceding module. It should also be understood that the module sending the superframe can be understood as the module sending the superframe to the receiving end through the channel, or it can be understood as the module sending the superframe to its succeeding module. In this embodiment, there is no training symbol in the subframe, which has lower redundancy and simplifies the structure of the subframe.

[0006] In some possible implementations, N PG is 96 or 128. It can be seen that the interval for inserting pilot symbols in the subframe is larger, which further reduces the redundancy.

[0007] In some possible implementations, in a subframe, a pilot symbol sequence including multiple pilot symbols in a first polarization direction is different from a pilot symbol sequence including multiple pilot symbols in a second polarization direction, so as to avoid the problem that a receiving end cannot distinguish between two polarization directions in actual transmission. The first polarization direction and the second polarization direction are orthogonal to each other.

[0008] In some possible implementations, in a subframe, the sum of the real parts of all pilot symbols in one polarization direction is 0, and the sum of the imaginary parts of all pilot symbols in one polarization direction is 0, so that DC balance can be achieved, which is beneficial for the receiving end to restore the signal quality. FAW The sum of the real parts of the frame synchronization symbols except for the symbols that are both pilot symbols and frame synchronization symbols is 0. FAW The sum of the imaginary parts of the frame synchronization symbols except for the symbols that are both pilot symbols and frame synchronization symbols is 0, so that a DC balance can be achieved, which is beneficial for the receiving end to restore the signal quality.

[0009] In some possible implementations, in a subframe, the number of pilot symbols in one polarization direction whose values ​​are -A-Aj, -A+Aj, A-Aj and A+Aj differs from each other by less than or equal to 2, effectively ensuring that the number of symbols in each polarization direction is nearly balanced.

[0010] In some possible implementations, in a subframe, the number of pilot symbols that are -A-Aj in two polarization directions, the number of pilot symbols that are -A+Aj in two polarization directions, the number of pilot symbols that are A-Aj in two polarization directions, and the number of pilot symbols that are A+Aj in two polarization directions are the same, effectively ensuring the balance of the number of symbols in the two polarization directions.

[0011] In some possible implementations, N FAW The continuous frame synchronization symbols are arranged starting from the start position of the first type of subframe, so that the structure of the subframe is more neat.

[0012] In some possible implementations, N FAW The symbol located at the starting position of the consecutive frame synchronization symbols is both a pilot symbol and a frame synchronization symbol, so that the arrangement of the pilot symbols is more conducive to standardization.

[0013] In some possible implementations, the first type of subframe also includes a reserved symbol and a pre-framing symbol. In the first type of subframe, the frame synchronization symbol is located before the reserved symbol, and the reserved symbol is located before the pre-framing symbol, which enriches the functional implementation of the first type of subframe.

[0014] In some possible implementations, the superframe includes at least one second-type subframe, and the second-type subframe also includes a pre-framing symbol.

[0015] In some possible implementations, the number of pre-framing symbols in a superframe is N. CW , the total number of symbols in the superframe is N F , N PG 、N CW and N F The corresponding relationship between them is one of the following items:

[0016] N PG =128, N CW =172032,N F =173440 or 173568 or 173696 or 173824 or 173952 or 174080;

[0017] N PG =128, N CW =344064,N F =346880 or 347136 or 347392 or 347520 or 347648 or 347776 or 347904 or 348160;

[0018] N PG =128, N CW =516096,N F=520192 or 520320 or 520448 or 520576 or 520704 or 520832 or 520960 or 521088 or 521472 or 521600 or 521856 or 522240;

[0019] N PG =128, N CW =688128,N F =693760 or 693888 or 694144 or 694272 or 694400 or 694656 or 694784 or 694912 or 695040 or 695296 or 695552 or 695808 or 696192 or 696320;

[0020] N PG =128, N CW =150528,N F =152064 or 152192 or 152320;

[0021] N PG =128, N CW =129024,N F =130176 or 130560;

[0022] N PG =128, N CW =107520,N F =108416 or 108544 or 108672 or 108800;

[0023] N PG =128, N CW =175616,N F =177152 or 177280 or 177408 or 177536 or 177664;

[0024] N PG =128, N CW =351232,N F =354304 or 354432 or 354560 or 354688 or 354816 or 354944 or 355072 or 355200 or 355328;

[0025] N PG =128, N CW =526848,N F =531200 or 531456 or 531712 or 531840 or 532224 or 532480 or 532608 or 532864 or 532992 or 533120;

[0026] N PG =128, N CW =702464,N F =708096 or 708224 or 708480 or 708608 or 708736 or 708864 or 708992 or 709120 or 709376 or 709504 or 709632 or 709888 or 710016 or 710144 or 710272 or 710400 or 710528 or 710656;

[0027] N PG =96, N CW =172032,N F =173952 or 174048 or 174240 or 174336 or 174432 or 174528;

[0028] N PG =96, N CW =344064,N F =347904 or 348000 or 348096 or 348192 or 348384 or 348480 or 348672 or 348768 or 348864 or 349056;

[0029] N PG =96, N CW =516096,N F =521664 or 521856 or 522144 or 522240 or 522720 or 522816 or 523008 or 523200 or 523296 or 523393 or 523488 or 523584 or 523776;

[0030] N PG =96, N CW =688128,N F =695520 or 695808 or 695904 or 696000 or 696192 or 696384 or 696672 or 696768 or 696864 or 696960 or 697056 or 697248 or 697344 or 697536 or 697632 or 697728 or 698112 or 698400;

[0031] N PG =96, N CW =150528,N F =152160 or 152256 or 152352 or 152448 or 152544 or 152640 or 152736;

[0032] N PG =96, N CW =129024,N F =130464 or 130560 or 130752 or 130848 or 130944;

[0033] N PG =96, N CW =107520,N F =108768 or 108864 or 108960 or 109056;

[0034] N PG =96, N CW =175616,N F =177504 or 177600 or 177888 or 177984 or 178080 or 178176;

[0035] N PG =96, N CW =351232,N F =355008 or 355104 or 355200 or 355488 or 355680 or 355776 or 355872 or 355968 or 356160 or 356352 or 356448;

[0036] N PG =96, N CW =526848,N F =532416 or 532512 or 532608 or 532704 or 532800 or 532896 or 532992 or 533280 or 533376 or 533568 or 533664 or 533760 or 533856 or 533952 or 534144 or 534240 or 534336 or 534432 or 534528;

[0037] N PG =96, N CW =702464,N F =709920 or 710016 or 710112 or 710208 or 710304 or 710400 or 710688 or 710784 or 710976 or 711168 or 711264 or 711360 or 711552 or 711648 or 711744 or 711936 or 712320 or 712416 or 712704 or 712800 or 712896.

[0038] In some possible implementations, in one polarization direction, the modulation format of the symbols in the superframe is Quadrature Phase Shift Keying (QPSK), A=-1 or 1. Alternatively, in one polarization direction, the modulation format of the symbols in the superframe is 16QAM, A=-1, 1, -3, 3, or Alternatively, in one polarization direction, the modulation format of the symbols in the superframe is 64QAM, A = -1, 1, -3, 3, -5, 5, -7, or 7.

[0039] In a second aspect, an embodiment of the present application provides a transmission method for optical communication, which is applied to a receiving end. Specifically, the receiving end receives a superframe including a plurality of subframes, wherein the subframe includes a pilot symbol. In one polarization direction, the number of pilot symbols in the subframe is N PS is an even number greater than 0. Each pilot symbol is one of the four complex numbers -A-Aj, -A+Aj, A-Aj and A+Aj. A is a real number. PG The symbols include a pilot symbol located at a fixed position. The superframe includes a first-type subframe, and the first-type subframe also includes N FAW frame synchronization symbols, each of which is one of the four complex numbers -A-Aj, -A+Aj, A-Aj and A+Aj. In the first type of subframe, there is a symbol that is both a pilot symbol and a frame synchronization symbol, N FAW is an odd number. Then, the receiving end decodes the superframe.

[0040] In some possible implementations, N PG is 96 or 128.

[0041] In some possible implementations, in a subframe, a pilot symbol sequence including multiple pilot symbols in a first polarization direction is different from a pilot symbol sequence including multiple pilot symbols in a second polarization direction, so as to avoid the problem that a receiving end cannot distinguish between two polarization directions in actual transmission. The first polarization direction and the second polarization direction are orthogonal to each other.

[0042] In some possible implementations, in a subframe, the sum of the real parts of all pilot symbols in one polarization direction is 0, and the sum of the imaginary parts of all pilot symbols in one polarization direction is 0, so that DC balance can be achieved, which is beneficial for the receiving end to restore the signal quality. FAW The sum of the real parts of the frame synchronization symbols except for the symbols that are both pilot symbols and frame synchronization symbols is 0. FAWThe sum of the imaginary parts of the frame synchronization symbols except for the symbols that are both pilot symbols and frame synchronization symbols is 0, so that a DC balance can be achieved, which is beneficial for the receiving end to restore the signal quality.

[0043] In some possible implementations, in a subframe, the number of pilot symbols in one polarization direction whose values ​​are -A-Aj, -A+Aj, A-Aj and A+Aj differs from each other by less than or equal to 2, effectively ensuring that the number of symbols in each polarization direction is nearly balanced.

[0044] In some possible implementations, in a subframe, the number of pilot symbols that are -A-Aj in two polarization directions, the number of pilot symbols that are -A+Aj in two polarization directions, the number of pilot symbols that are A-Aj in two polarization directions, and the number of pilot symbols that are A+Aj in two polarization directions are the same, effectively ensuring the balance of the number of symbols in the two polarization directions.

[0045] In some possible implementations, N FAW The continuous frame synchronization symbols are arranged starting from the start position of the first type of subframe, so that the structure of the subframe is more neat.

[0046] In some possible implementations, N FAW The symbol located at the starting position of the consecutive frame synchronization symbols is both a pilot symbol and a frame synchronization symbol, so that the arrangement of the pilot symbols is more conducive to standardization.

[0047] In some possible implementations, the first type of subframe also includes a reserved symbol and a pre-framing symbol. In the first type of subframe, the frame synchronization symbol is located before the reserved symbol, and the reserved symbol is located before the pre-framing symbol, which enriches the functional implementation of the first type of subframe.

[0048] In some possible implementations, the superframe includes at least one second-type subframe, and the second-type subframe also includes a pre-framing symbol.

[0049] In some possible implementations, the number of pre-framing symbols in a superframe is N. CW , the total number of symbols in the superframe is N F , N PG 、N CW and N F The corresponding relationship between them is one of the following items:

[0050] N PG =128, N CW =172032,N F =173440 or 173568 or 173696 or 173824 or 173952 or 174080;

[0051] N PG =128, N CW =344064,N F =346880 or 347136 or 347392 or 347520 or 347648 or 347776 or 347904 or 348160;

[0052] N PG =128, N CW =516096,N F =520192 or 520320 or 520448 or 520576 or 520704 or 520832 or 520960 or 521088 or 521472 or 521600 or 521856 or 522240;

[0053] N PG =128, N CW =688128,N F =693760 or 693888 or 694144 or 694272 or 694400 or 694656 or 694784 or 694912 or 695040 or 695296 or 695552 or 695808 or 696192 or 696320;

[0054] N PG =128, N CW =150528,N F =152064 or 152192 or 152320;

[0055] N PG =128, N CW =129024,N F =130176 or 130560;

[0056] N PG =128, N CW =107520,N F =108416 or 108544 or 108672 or 108800;

[0057] N PG =128, N CW =175616,N F =177152 or 177280 or 177408 or 177536 or 177664;

[0058] N PG =128, N CW =351232,N F=354304 or 354432 or 354560 or 354688 or 354816 or 354944 or 355072 or 355200 or 355328;

[0059] N PG =128, N CW =526848,N F =531200 or 531456 or 531712 or 531840 or 532224 or 532480 or 532608 or 532864 or 532992 or 533120;

[0060] N PG =128, N CW =702464,N F =708096 or 708224 or 708480 or 708608 or 708736 or 708864 or 708992 or 709120 or 709376 or 709504 or 709632 or 709888 or 710016 or 710144 or 710272 or 710400 or 710528 or 710656;

[0061] N PG =96, N CW =172032,N F =173952 or 174048 or 174240 or 174336 or 174432 or 174528;

[0062] N PG =96, N CW =344064,N F =347904 or 348000 or 348096 or 348192 or 348384 or 348480 or 348672 or 348768 or 348864 or 349056;

[0063] N PG =96, N CW =516096,N F =521664 or 521856 or 522144 or 522240 or 522720 or 522816 or 523008 or 523200 or 523296 or 523393 or 523488 or 523584 or 523776;

[0064] N PG =96, N CW =688128,N F=695520 or 695808 or 695904 or 696000 or 696192 or 696384 or 696672 or 696768 or 696864 or 696960 or 697056 or 697248 or 697344 or 697536 or 697632 or 697728 or 698112 or 698400;

[0065] N PG =96, N CW =150528,N F =152160 or 152256 or 152352 or 152448 or 152544 or 152640 or 152736;

[0066] N PG =96, N CW =129024,N F =130464 or 130560 or 130752 or 130848 or 130944;

[0067] N PG =96, N CW =107520,N F =108768 or 108864 or 108960 or 109056;

[0068] N PG =96, N CW =175616,N F =177504 or 177600 or 177888 or 177984 or 178080 or 178176;

[0069] N PG =96, N CW =351232,N F =355008 or 355104 or 355200 or 355488 or 355680 or 355776 or 355872 or 355968 or 356160 or 356352 or 356448;

[0070] N PG =96, N CW =526848,N F =532416 or 532512 or 532608 or 532704 or 532800 or 532896 or 532992 or 533280 or 533376 or 533568 or 533664 or 533760 or 533856 or 533952 or 534144 or 534240 or 534336 or 534432 or 534528;

[0071] N PG =96, N CW =702464,N F =709920 or 710016 or 710112 or 710208 or 710304 or 710400 or 710688 or 710784 or 710976 or 711168 or 711264 or 711360 or 711552 or 711648 or 711744 or 711936 or 712320 or 712416 or 712704 or 712800 or 712896.

[0072] In some possible implementations, in one polarization direction, the modulation format of the symbols in the superframe is Quadrature Phase Shift Keying (QPSK), A=-1 or 1. Alternatively, in one polarization direction, the modulation format of the symbols in the superframe is 16QAM, A=-1, 1, -3, 3, or Alternatively, in one polarization direction, the modulation format of the symbols in the superframe is 64QAM, A = -1, 1, -3, 3, -5, 5, -7, or 7.

[0073] In a third aspect, an embodiment of the present application provides a chip, which includes a processor and a memory, the memory and the processor are interconnected via lines, instructions are stored in the memory, and the processor is used to execute the method described in any implementation method of the first aspect and the second aspect.

[0074] In a fourth aspect, an embodiment of the present application provides a data transmission device applied to a transmitting end, the data transmission device comprising: a processing unit and a transmitting unit. The processing unit is used to: obtain a superframe including multiple subframes, the subframe including pilot symbols. In one polarization direction, the number of pilot symbols in the subframe N is PS is an even number greater than 0. Each pilot symbol is one of the four complex numbers -A-Aj, -A+Aj, A-Aj and A+Aj. A is a real number. PG The symbols include a pilot symbol located at a fixed position. The superframe includes a first-type subframe, and the first-type subframe also includes N FAW frame synchronization symbols, each of which is one of the four complex numbers -A-Aj, -A+Aj, A-Aj and A+Aj. In the first type of subframe, there is a symbol that is both a pilot symbol and a frame synchronization symbol, N FAW is an odd number. The sending unit is used to send a superframe.

[0075] In some possible implementations, N PG is 96 or 128.

[0076] In some possible implementations, in a subframe, a pilot symbol sequence including multiple pilot symbols in a first polarization direction is different from a pilot symbol sequence including multiple pilot symbols in a second polarization direction, so as to avoid the problem that a receiving end cannot distinguish between two polarization directions in actual transmission. The first polarization direction and the second polarization direction are orthogonal to each other.

[0077] In some possible implementations, in a subframe, the sum of the real parts of all pilot symbols in one polarization direction is 0, and the sum of the imaginary parts of all pilot symbols in one polarization direction is 0, so that DC balance can be achieved, which is beneficial for the receiving end to restore the signal quality. FAW The sum of the real parts of the frame synchronization symbols except for the symbols that are both pilot symbols and frame synchronization symbols is 0. FAW The sum of the imaginary parts of the frame synchronization symbols except for the symbols that are both pilot symbols and frame synchronization symbols is 0, so that a DC balance can be achieved, which is beneficial for the receiving end to restore the signal quality.

[0078] In some possible implementations, in a subframe, the number of pilot symbols in one polarization direction whose values ​​are -A-Aj, -A+Aj, A-Aj and A+Aj differs from each other by less than or equal to 2, effectively ensuring that the number of symbols in each polarization direction is nearly balanced.

[0079] In some possible implementations, in a subframe, the number of pilot symbols that are -A-Aj in two polarization directions, the number of pilot symbols that are -A+Aj in two polarization directions, the number of pilot symbols that are A-Aj in two polarization directions, and the number of pilot symbols that are A+Aj in two polarization directions are the same, effectively ensuring the balance of the number of symbols in the two polarization directions.

[0080] In some possible implementations, N FAW The continuous frame synchronization symbols are arranged starting from the start position of the first type of subframe, so that the structure of the subframe is more neat.

[0081] In some possible implementations, N FAW The symbol located at the starting position of the consecutive frame synchronization symbols is both a pilot symbol and a frame synchronization symbol, so that the arrangement of the pilot symbols is more conducive to standardization.

[0082] In some possible implementations, the first type of subframe also includes a reserved symbol and a pre-framing symbol. In the first type of subframe, the frame synchronization symbol is located before the reserved symbol, and the reserved symbol is located before the pre-framing symbol, which enriches the functional implementation of the first type of subframe.

[0083] In some possible implementations, the superframe includes at least one second-type subframe, and the second-type subframe also includes a pre-framing symbol.

[0084] In some possible implementations, the number of pre-framing symbols in a superframe is N. CW , the total number of symbols in the superframe is N F , N PG 、N CW and N F The corresponding relationship between them is one of the following items:

[0085] N PG =128, N CW =172032,N F =173440 or 173568 or 173696 or 173824 or 173952 or 174080;

[0086] N PG =128, N CW =344064,N F =346880 or 347136 or 347392 or 347520 or 347648 or 347776 or 347904 or 348160;

[0087] N PG =128, N CW =516096,N F =520192 or 520320 or 520448 or 520576 or 520704 or 520832 or 520960 or 521088 or 521472 or 521600 or 521856 or 522240;

[0088] N PG =128, N CW =688128,N F =693760 or 693888 or 694144 or 694272 or 694400 or 694656 or 694784 or 694912 or 695040 or 695296 or 695552 or 695808 or 696192 or 696320;

[0089] N PG =128, N CW =150528,N F =152064 or 152192 or 152320;

[0090] N PG =128, N CW =129024,NF =130176 or 130560;

[0091] N PG =128, N CW =107520,N F =108416 or 108544 or 108672 or 108800;

[0092] N PG =128, N CW =175616,N F =177152 or 177280 or 177408 or 177536 or 177664;

[0093] N PG =128, N CW =351232,N F =354304 or 354432 or 354560 or 354688 or 354816 or 354944 or 355072 or 355200 or 355328;

[0094] N PG =128, N CW =526848,N F =531200 or 531456 or 531712 or 531840 or 532224 or 532480 or 532608 or 532864 or 532992 or 533120;

[0095] N PG =128, N CW =702464,N F =708096 or 708224 or 708480 or 708608 or 708736 or 708864 or 708992 or 709120 or 709376 or 709504 or 709632 or 709888 or 710016 or 710144 or 710272 or 710400 or 710528 or 710656;

[0096] N PG =96, N CW =172032,N F =173952 or 174048 or 174240 or 174336 or 174432 or 174528;

[0097] N PG =96, N CW =344064,N F=347904 or 348000 or 348096 or 348192 or 348384 or 348480 or 348672 or 348768 or 348864 or 349056;

[0098] N PG =96, N CW =516096,N F =521664 or 521856 or 522144 or 522240 or 522720 or 522816 or 523008 or 523200 or 523296 or 523393 or 523488 or 523584 or 523776;

[0099] N PG =96, N CW =688128,N F =695520 or 695808 or 695904 or 696000 or 696192 or 696384 or 696672 or 696768 or 696864 or 696960 or 697056 or 697248 or 697344 or 697536 or 697632 or 697728 or 698112 or 698400;

[0100] N PG =96, N CW =150528,N F =152160 or 152256 or 152352 or 152448 or 152544 or 152640 or 152736;

[0101] N PG =96, N CW =129024,N F =130464 or 130560 or 130752 or 130848 or 130944;

[0102] N PG =96, N CW =107520,N F =108768 or 108864 or 108960 or 109056;

[0103] N PG =96, N CW =175616,N F =177504 or 177600 or 177888 or 177984 or 178080 or 178176;

[0104] N PG =96, N CW =351232,NF =355008 or 355104 or 355200 or 355488 or 355680 or 355776 or 355872 or 355968 or 356160 or 356352 or 356448;

[0105] N PG =96, N CW =526848,N F =532416 or 532512 or 532608 or 532704 or 532800 or 532896 or 532992 or 533280 or 533376 or 533568 or 533664 or 533760 or 533856 or 533952 or 534144 or 534240 or 534336 or 534432 or 534528;

[0106] N PG =96, N CW =702464,N F =709920 or 710016 or 710112 or 710208 or 710304 or 710400 or 710688 or 710784 or 710976 or 711168 or 711264 or 711360 or 711552 or 711648 or 711744 or 711936 or 712320 or 712416 or 712704 or 712800 or 712896.

[0107] In some possible implementations, in one polarization direction, the modulation format of the symbols in the superframe is Quadrature Phase Shift Keying (QPSK), A=-1 or 1. Alternatively, in one polarization direction, the modulation format of the symbols in the superframe is 16QAM, A=-1, 1, -3, 3, or Alternatively, in one polarization direction, the modulation format of the symbols in the superframe is 64QAM, A = -1, 1, -3, 3, -5, 5, -7, or 7.

[0108] In a fifth aspect, an embodiment of the present application provides a data transmission device applied to a receiving end, the data transmission device comprising: a receiving unit and a processing unit. The receiving unit is used to: receive a superframe including multiple subframes, the subframe including pilot symbols. In one polarization direction, the number of pilot symbols in the subframe is N PS is an even number greater than 0. Each pilot symbol is one of the four complex numbers -A-Aj, -A+Aj, A-Aj and A+Aj. A is a real number. Each consecutive N in a subframe PGThe symbols include a pilot symbol located at a fixed position. The superframe includes a first-type subframe, and the first-type subframe also includes N FAW frame synchronization symbols, each of which is one of the four complex numbers -A-Aj, -A+Aj, A-Aj and A+Aj. In the first type of subframe, there is a symbol that is both a pilot symbol and a frame synchronization symbol, N FAW is an odd number. The processing unit is used to: decode the super frame.

[0109] In some possible implementations, N PG is 96 or 128.

[0110] In some possible implementations, in a subframe, a pilot symbol sequence including multiple pilot symbols in a first polarization direction is different from a pilot symbol sequence including multiple pilot symbols in a second polarization direction, so as to avoid the problem that a receiving end cannot distinguish between two polarization directions in actual transmission. The first polarization direction and the second polarization direction are orthogonal to each other.

[0111] In some possible implementations, in a subframe, the sum of the real parts of all pilot symbols in one polarization direction is 0, and the sum of the imaginary parts of all pilot symbols in one polarization direction is 0, so that DC balance can be achieved, which is beneficial for the receiving end to restore the signal quality. FAW The sum of the real parts of the frame synchronization symbols except for the symbols that are both pilot symbols and frame synchronization symbols is 0. FAW The sum of the imaginary parts of the frame synchronization symbols except for the symbols that are both pilot symbols and frame synchronization symbols is 0, so that a DC balance can be achieved, which is beneficial for the receiving end to restore the signal quality.

[0112] In some possible implementations, in a subframe, the number of pilot symbols in one polarization direction whose values ​​are -A-Aj, -A+Aj, A-Aj and A+Aj differs from each other by less than or equal to 2, effectively ensuring that the number of symbols in each polarization direction is nearly balanced.

[0113] In some possible implementations, in a subframe, the number of pilot symbols that are -A-Aj in two polarization directions, the number of pilot symbols that are -A+Aj in two polarization directions, the number of pilot symbols that are A-Aj in two polarization directions, and the number of pilot symbols that are A+Aj in two polarization directions are the same, effectively ensuring the balance of the number of symbols in the two polarization directions.

[0114] In some possible implementations, N FAWThe continuous frame synchronization symbols are arranged starting from the start position of the first type of subframe, so that the structure of the subframe is more neat.

[0115] In some possible implementations, N FAW The symbol located at the starting position of the consecutive frame synchronization symbols is both a pilot symbol and a frame synchronization symbol, so that the arrangement of the pilot symbols is more conducive to standardization.

[0116] In some possible implementations, the first type of subframe also includes a reserved symbol and a pre-framing symbol. In the first type of subframe, the frame synchronization symbol is located before the reserved symbol, and the reserved symbol is located before the pre-framing symbol, which enriches the functional implementation of the first type of subframe.

[0117] In some possible implementations, the superframe includes at least one second-type subframe, and the second-type subframe also includes a pre-framing symbol.

[0118] In some possible implementations, the number of pre-framing symbols in a superframe is N. CW , the total number of symbols in the superframe is N F , N PG 、N CW and N F The corresponding relationship between them is one of the following items:

[0119] N PG =128, N CW =172032,N F =173440 or 173568 or 173696 or 173824 or 173952 or 174080;

[0120] N PG =128, N CW =344064,N F =346880 or 347136 or 347392 or 347520 or 347648 or 347776 or 347904 or 348160;

[0121] N PG =128, N CW =516096,N F =520192 or 520320 or 520448 or 520576 or 520704 or 520832 or 520960 or 521088 or 521472 or 521600 or 521856 or 522240;

[0122] N PG =128, N CW =688128,N F=693760 or 693888 or 694144 or 694272 or 694400 or 694656 or 694784 or 694912 or 695040 or 695296 or 695552 or 695808 or 696192 or 696320;

[0123] N PG =128, N CW =150528,N F =152064 or 152192 or 152320;

[0124] N PG =128, N CW =129024,N F =130176 or 130560;

[0125] N PG =128, N CW =107520,N F =108416 or 108544 or 108672 or 108800;

[0126] N PG =128, N CW =175616,N F =177152 or 177280 or 177408 or 177536 or 177664;

[0127] N PG =128, N CW =351232,N F =354304 or 354432 or 354560 or 354688 or 354816 or 354944 or 355072 or 355200 or 355328;

[0128] N PG =128, N CW =526848,N F =531200 or 531456 or 531712 or 531840 or 532224 or 532480 or 532608 or 532864 or 532992 or 533120;

[0129] N PG =128, N CW =702464,N F=708096 or 708224 or 708480 or 708608 or 708736 or 708864 or 708992 or 709120 or 709376 or 709504 or 709632 or 709888 or 710016 or 710144 or 710272 or 710400 or 710528 or 710656;

[0130] N PG =96, N CW =172032,N F =173952 or 174048 or 174240 or 174336 or 174432 or 174528;

[0131] N PG =96, N CW =344064,N F =347904 or 348000 or 348096 or 348192 or 348384 or 348480 or 348672 or 348768 or 348864 or 349056;

[0132] N PG =96, N CW =516096,N F =521664 or 521856 or 522144 or 522240 or 522720 or 522816 or 523008 or 523200 or 523296 or 523393 or 523488 or 523584 or 523776;

[0133] N PG =96, N CW =688128,N F =695520 or 695808 or 695904 or 696000 or 696192 or 696384 or 696672 or 696768 or 696864 or 696960 or 697056 or 697248 or 697344 or 697536 or 697632 or 697728 or 698112 or 698400;

[0134] N PG =96, N CW =150528,N F =152160 or 152256 or 152352 or 152448 or 152544 or 152640 or 152736;

[0135] N PG =96, N CW =129024,N F=130464 or 130560 or 130752 or 130848 or 130944;

[0136] N PG =96, N CW =107520,N F =108768 or 108864 or 108960 or 109056;

[0137] N PG =96, N CW =175616,N F =177504 or 177600 or 177888 or 177984 or 178080 or 178176;

[0138] N PG =96, N CW =351232,N F =355008 or 355104 or 355200 or 355488 or 355680 or 355776 or 355872 or 355968 or 356160 or 356352 or 356448;

[0139] N PG =96, N CW =526848,N F =532416 or 532512 or 532608 or 532704 or 532800 or 532896 or 532992 or 533280 or 533376 or 533568 or 533664 or 533760 or 533856 or 533952 or 534144 or 534240 or 534336 or 534432 or 534528;

[0140] N PG =96, N CW =702464,N F =709920 or 710016 or 710112 or 710208 or 710304 or 710400 or 710688 or 710784 or 710976 or 711168 or 711264 or 711360 or 711552 or 711648 or 711744 or 711936 or 712320 or 712416 or 712704 or 712800 or 712896.

[0141] In some possible implementations, in one polarization direction, the modulation format of the symbols in the superframe is Quadrature Phase Shift Keying (QPSK), A=-1 or 1. Alternatively, in one polarization direction, the modulation format of the symbols in the superframe is 16QAM, A=-1, 1, -3, 3, or Alternatively, in one polarization direction, the modulation format of the symbols in the superframe is 64QAM, A = -1, 1, -3, 3, -5, 5, -7, or 7.

[0142] In a sixth aspect, an embodiment of the present application provides a data transmission system, which includes a data transmission device applied to a sending end as described in any implementation of the fourth aspect and a data transmission device applied to a receiving end as described in any implementation of the fifth aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0143] Figure 1 A schematic diagram of a communication system used in an embodiment of the present application;

[0144] Figure 2 A schematic diagram of a framing process in an embodiment of the present application;

[0145] Figure 3 A schematic diagram of a transmission method for optical communication in an embodiment of the present application;

[0146] Figure 4 This is a schematic diagram of the structure of a superframe in an embodiment of the present application;

[0147] Figure 5 A schematic diagram of a structure of a subframe in an embodiment of the present application;

[0148] Figure 6 Another structural diagram of a subframe in an embodiment of the present application;

[0149] Figure 7 A schematic diagram of a constellation diagram in two polarization directions in an embodiment of the present application;

[0150] Figure 8 is another schematic diagram of a constellation diagram in two polarization directions in an embodiment of the present application;

[0151] Fig. 9 A schematic diagram of simulating symbol data flow in an embodiment of the present application;

[0152] Fig.10 This is a schematic diagram of the effects of cross-correlation and autocorrelation in an embodiment of the present application;

[0153] Fig.11This is a schematic diagram of a first implementation of a superframe and a subframe in an embodiment of the present application;

[0154] Fig.12 This is a schematic diagram of a second implementation of a superframe and a subframe in an embodiment of the present application;

[0155] Fig.13 This is a schematic diagram of a third implementation of a superframe and a subframe in an embodiment of the present application;

[0156] Fig.14 This is a schematic diagram of a fourth implementation of a superframe and a subframe in an embodiment of the present application;

[0157] Fig.15 This is a schematic diagram of a fifth implementation of a superframe and a subframe in an embodiment of the present application;

[0158] Fig.16 Schematic diagram of a sixth implementation of a superframe and a subframe in an embodiment of the present application;

[0159] Fig.17 Schematic diagram of a seventh implementation of a superframe and a subframe in an embodiment of the present application;

[0160] Fig.18 This is a schematic diagram of an eighth implementation of a superframe and a subframe in an embodiment of the present application;

[0161] Fig.19 Schematic diagram of a ninth implementation of a superframe and a subframe in an embodiment of the present application;

[0162] Fig. 20 Schematic diagram of the tenth implementation of a superframe and a subframe in the embodiment of the present application;

[0163] Fig.21 This is a schematic diagram of an eleventh implementation manner of a superframe and a subframe in an embodiment of the present application;

[0164] Fig. 22 This is a schematic diagram of a twelfth implementation manner of a superframe and a subframe in an embodiment of the present application;

[0165] Fig.23 This is a schematic diagram of the thirteenth implementation manner of a superframe and a subframe in the embodiments of the present application;

[0166] Fig.24 This is a schematic diagram of the fourteenth implementation manner of a superframe and a subframe in the embodiments of the present application;

[0167] Fig.25 This is a schematic diagram of the structure of a data transmission device applied to a sending end in an embodiment of the present application;

[0168] Fig.26 Schematic diagram of the structure of a data transmission device applied to a receiving end in an embodiment of the present application;

[0169] Fig. 27 Another structural schematic diagram of the data transmission device in an embodiment of the present application. DETAILED DESCRIPTION

[0170] The embodiments of the present application provide a transmission method and related devices for optical communication. There is no training symbol in the subframe, which has lower redundancy and simplifies the structure of the subframe.

[0171] Figure 1 Schematic diagram of the communication system used in the embodiment of the present application. Figure 1 As shown, at the transmitting end, the information source provides a data stream to be sent; the encoder receives the data stream and encodes it, and the codeword information obtained by encoding the check bits and information bits is sent to the transmitting end signal processor for framing, and is transmitted through the channel to the receiving end; after the receiving end receives the distorted signal caused by noise or other damage in the channel, it is sent to the receiving end signal processor for dispersion compensation, synchronization, phase recovery and other operations, and then decoded by the decoder to restore the original data and send it to the destination. Among them, the transmission method for optical communication provided in the embodiment of the present application is applied to Figure 1 The transmitting signal processor shown is a very important part of the communication system.

[0172] Figure 2 FIG. 1 is a schematic diagram of the framing process in an embodiment of the present application. In one framing method, Figure 2As shown in (a), the received data sequence is symbol mapped, including but not limited to quadrature phase shift keying (QPSK) and quadrature amplitude modulation (QAM), and then polarization symbol division (Polarization distribution) is performed to obtain dual-polarization (DP) symbols, such as DP-QPSK, DP-8QAM, DP-16QAM, DP-32QAM and DP-64QAM. A certain number of dual-polarization symbols are framed, and these dual-polarization symbols before framing are called pre-framing symbols, which can also be called payload symbols. The framing process is as follows: insert a frame alignment word sequence (FAW Sequence), a reserved symbol (Reserved Fields) and a pilot symbol sequence (Pilot Sequence) in the X and Y polarization directions respectively to obtain a dual-polarization symbol sequence to be sent, which is called a super-frame, which can also be called a multi-frame. Here, the frame synchronization symbol sequence is also referred to as a super-frame alignment symbol sequence. It should be noted that the frame synchronization symbol sequence can also be used for link training, and in this case, the frame synchronization symbol can be considered as a training symbol sequence.

[0173] In an embodiment of the present application, a dual polarization symbol can be represented by two symbols, one of which is located in the X polarization direction and the other is located in the Y polarization direction, and each symbol can be represented by a complex number. For example, the symbol obtained by 16QAM modulation can be represented by any one of the following 16 complex numbers, ±1±1j, ±1±3j, ±3±1j and ±3±3j, where j here is a complex unit, and can also be represented by other letters such as i. It should be understood that in some cases, the real part and the imaginary part are normalized, but the essence does not change. Further, a sequence with N dual polarization symbols can be completely represented by two complex sequences of length N, one of which represents the symbol on the X polarization and the other represents the symbol on the Y polarization. Each complex sequence of length N is represented by a real sequence of length N and an imaginary sequence of length N, where N is an integer greater than 1. Typically, the received data sequence is the information and check sequence obtained by the forward error correction code (Forward Error Correction, FEC), Figure 2The framing operation shown in (a) in FIG. 1 is performed on symbols. In another framing method, Figure 2 As shown in (b) of FIG. 1 , for the received data sequence, the bits corresponding to the frame synchronization symbol sequence, the reserved symbol sequence and the pilot symbol sequence are first inserted according to the adopted symbol mapping rule, and then the bits corresponding to the frame synchronization symbol sequence, the reserved symbol sequence and the pilot symbol sequence are obtained through symbol mapping and polarization division. Figure 2 (a) in FIG. 1 and FIG. 2 operate the same superframe. Similarly, in another framing method, such as Figure 2 As shown in (c) of FIG. 1 , for the received data sequence, the bits corresponding to the frame synchronization symbol sequence, the reserved symbol sequence and the pilot symbol sequence are first inserted according to the adopted symbol mapping rule, and then polarization division and symbol mapping are performed to obtain the same Figure 2 (a) in FIG. 1 and FIG. 2 operate the same superframe. It should be understood that except Figure 2 In addition to the framing method introduced in, there may be other similar framing methods, which will not be described in detail in this application.

[0174] Figure 3 FIG. 1 is a schematic diagram of a transmission method for optical communication in an embodiment of the present application. Figure 3 As shown, the transmission method includes the following steps.

[0175] 101. A transmitting end obtains a superframe including multiple subframes.

[0176] Figure 4 FIG. 1 is a schematic diagram of a superframe structure in an embodiment of the present application. Figure 4 As shown, the superframe includes N SF subframes, each subframe includes N S symbols, then the superframe consists of N F Symbols, N F =N SF ×N S , N S and N SF are all integers greater than 1. The subframes in a superframe are divided into two categories, which are referred to as first-category subframes and second-category subframes. The following introduces these two categories of subframes respectively.

[0177] Figure 5 Schematic diagram of a subframe structure in an embodiment of the present application. Figure 5 (a) in FIG. 1 shows the structure of the first type of subframe, which includes pilot symbols, frame synchronization symbols, reserved symbols, and payload symbols. Usually, the first type of subframe is the subframe arranged in the first position in the superframe, but it is not excluded that it is located in other positions in the superframe. For example, the first type of subframe can also be the subframe arranged in the last position in the superframe. The other subframes in the superframe except the first type of subframe are the second type of subframes, such as Figure 5As shown in (b), the second type of subframe is different from the first type of subframe. The second type of subframe includes pilot symbols and payload symbols, but does not include frame synchronization symbols and reserved symbols.

[0178] For the first type of subframe and the second type of subframe, each subframe includes a pilot symbol, which is used for carrier phase recovery. In one polarization direction, the number of pilot symbols in a subframe is denoted as N PS , N PS is an even number greater than 0. For the first type of subframe, there is a symbol in the first type of subframe that is both a pilot symbol and a frame synchronization symbol, that is, Figure 5 The number of frame synchronization symbols in the first type of subframe is denoted by N. FAW , N FAW is an odd number. FAW The frame synchronization symbols include the symbol indicated by the dotted box, N PS The pilot symbols also include the symbol indicated by the dotted box. FAW The frame synchronization symbols are arranged from the beginning of the first type of subframe, N FAW The symbol at the starting position of the frame synchronization symbol is both a frame synchronization symbol and a pilot symbol. That is, the first symbol of the first type of subframe is the first symbol of the frame synchronization symbol sequence and the first symbol of the pilot symbol sequence. In other words, the first symbol of the frame synchronization symbol sequence is also the first symbol in the pilot symbol sequence, and the first symbol of the frame synchronization symbol sequence has the same value as the first symbol in the pilot symbol sequence. Of course, Figure 5 The symbol indicated by the dashed box in (a) may also be N FAW Any one of the frame synchronization symbols is not limited in this application.

[0179] Figure 6 Another structural diagram of a subframe in an embodiment of the present application is shown in FIG. PG symbols include a pilot symbol located at a fixed position, where N PG is 96 or 128. Figure 5 N shown in PG is 128, Figure 6 N shown in PG is 96. It should be understood that since each consecutive N PG The position of the pilot symbol in each symbol is fixed, so the interval between two consecutive pilot symbols in a subframe is equal. Usually, the pilot symbol is located every N consecutive PG The starting position of the symbols, of course, the pilot symbol is located in each consecutive N PG Any position in the symbol, no limitation is made here.

[0180] It should be noted that the frame synchronization symbol is used for synchronization between superframes, that is, N consecutive symbols starting from the first symbol of the first type of subframe FAW Symbols are used for frame synchronization. In addition, the frame synchronization symbol can also realize the synchronization function together with the pilot symbol. It should be understood that the frame synchronization symbols are arranged continuously, such as Figure 5 and Figure 6 As shown. After multiple frame synchronization symbols, there are usually multiple reserved symbols, which can be reserved for other future uses. The reserved symbols should be randomized and may not be symbols on the constellation diagram of the modulation format used. Of course, in some applications, the reserved symbols may also be symbols on the constellation diagram of the modulation format used. A part of the reserved symbols may also be fixed for other purposes, such as optical signal to noise ratio (OSNR) measurement, end-to-end (E2E) delay measurement, etc. The reserved symbols may also be located in one of multiple second-class subframes, which is not limited in this application. The remaining symbols are pre-framing symbols (i.e., payload symbols) containing information and checksums, wherein there is no overlap between the pilot symbols and the reserved symbols, and there is no overlap between the pilot symbols and the pre-framing symbols. In other words, there is no symbol that is both a pilot symbol and a pre-framing symbol, and there is no symbol that is both a pilot symbol and a reserved symbol.

[0181] Figure 7 A schematic diagram of a constellation diagram in two polarization directions in an embodiment of the present application. Figure 8 Another schematic diagram of the constellation diagram in two polarization directions in the embodiment of the present application. It should be noted that each frame synchronization symbol and each pilot symbol is one of the four complex numbers -A-Aj, -A+Aj, A-Aj and A+Aj, and A is a real number. In the embodiment of the present application, the value of A is determined by the modulation format used when generating the symbol. In some practical application scenarios, -A-Aj, -A+Aj, A-Aj and A+Aj are symbols on the constellation diagram of the modulation format used. For example, using QPSK, there are only four symbols, and A=1 or -1 at this time. Each pilot symbol can be represented by one of -1-1j, -1+1j, 1-1j and 1+1j. In a subframe, the pilot symbols represented by the four complex numbers will exist; and using 16QAM, there are 16 symbols, and A=1, -1, 3 or -3 at this time. Usually, the pilot symbols are the outermost 4 symbols on the constellation diagram, such as Figure 7As shown by the hollow symbols in (a), A = 3 or -3. Each pilot symbol can be represented by one of -3-3j, -3+3j, 3-3j and 3+3j. In a subframe, these four complex numbers will all exist. Similarly, with 64QAM, there are 64 symbols. In this case, A = 1, -1, 3, -3, 5, -5, 7 or -7. Usually, among the complex numbers representing pilot symbols, A = 5, -5, 7 or -7. Assuming A = 7 or -7, as Figure 8 As shown in the hollow symbols in (a), each pilot symbol can be represented by one of -7-7j, -7+7j, 7-7j and 7+7j. In a subframe, these four complex numbered pilot symbols will exist, and the same is true for the pilot symbols. A higher-order modulation format can also be used, which will not be described in detail in this application. In the actual transmission process, the probability of symbol error can be reduced, which is convenient for channel estimation.

[0182] It should be noted that it is also possible to compress the symbols on the constellation diagram. Correspondingly, the value of A will also be compressed accordingly. Taking 16QAM as an example, the power of the 16 symbols on the 16QAM constellation diagram is normalized. At this time, the value becomes The value of A is It is also possible to use other normalization methods, which are not limited in this application.

[0183] Taking 64QAM as an example, the power of 64 symbols on the 64QAM constellation diagram is normalized. At this time, the value becomes The value of A is It is also possible to use other normalization methods, which are not limited in this application.

[0184] It should be understood that when the pilot symbols -A-Aj, -A+Aj, A-Aj, and A+Aj use the outermost 4 symbols of the constellation diagram, the sensitivity of the pilot symbols is higher, but the peak to average power ratio is larger; when the pilot symbols take the values ​​of -A-Aj, -A+Aj, A-Aj, and A+Aj and use the innermost 4 symbols of the constellation diagram, the pilot noise is smaller, but its sensitivity is lower.

[0185] It should be noted that in some practical application scenarios, the pilot symbols -A-Aj, -A+Aj, A-Aj, and A+Aj may not be symbols on the constellation diagram of the modulation format used, but may be 4 symbols in the middle area between the outermost 4 symbols and the innermost 4 symbols of the constellation diagram. In this case, the pilot symbol noise and sensitivity are average, but the peak-to-average power ratio is relatively low. Taking 16QAM as an example, the values ​​of the 16 symbols on the 16QAM constellation diagram are one of {±1±1j, ±1±3j, ±3±1j, ±3±3j}, and the value of the real number A satisfies 1≤A≤3. More specifically, if Figure 7 As shown in (b) in the figure, the outermost 4 symbols of the constellation diagram are 3+3j, 3-3j, -3+3j, -3-3j, and the innermost 4 symbols of the constellation diagram are 1+1j, 1-1j, -1+1j, -1-1j. The values ​​of the pilot symbols -A-Aj, -A+Aj, A-Aj, and A+Aj can be any 4 symbols in the middle area between the outermost 4 symbols and the innermost 4 symbols of the 16QAM constellation diagram. The specific value of the real number A can be selected according to the actual application scenario so that the peak-to-average power ratio, noise, and sensitivity of the pilot have a good compromise. For example, the real number The value of the pilot symbol is In addition, when the 16 symbols on the 16QAM constellation are power normalized, the value is One of the values ​​of real number A satisfies For example, real numbers The value of the pilot symbol is Taking 64QAM as an example, the values ​​of the 64 symbols on the 64QAM constellation are one of {±1±1j,±1±3j,±1±5j,±1±7j,±3±1j,±5±1j,±7±1j,±3±3j,±3±5j,±3±7j,±5±3j,±7±3j,±5±5j,±5±7j,±7±5j,±7±7j}, and the value of the real number A satisfies 1≤A≤7. More specifically, as Figure 8 As shown in (b) in the figure, the outermost 4 symbols of the constellation diagram are 7+7j, 7-7j, -7+7j, -7-7j, and the innermost 4 symbols of the constellation diagram are 1+1j, 1-1j, -1+1j, -1-1j. The values ​​of the pilot symbols -A-Aj, -A+Aj, A-Aj, and A+Aj can be any 4 symbols in the middle area between the outermost 4 symbols and the innermost 4 symbols of the 64QAM constellation diagram. The specific value of the real number A can be selected according to the actual application scenario so that the peak-to-average power ratio, noise, and sensitivity of the pilot have a good compromise. For example, the real number The value of the pilot symbol is In addition, when the 64 symbols on the 64QAM constellation are power normalized, the value is

[0186] One of the values ​​of real number A satisfies For example, real numbers The value of the pilot symbol is One of them.

[0187] It should be noted that in a subframe, the pilot symbol sequence including multiple pilot symbols in the X polarization direction is different from the pilot symbol sequence including multiple pilot symbols in the Y polarization direction. The X polarization direction and the Y polarization direction are orthogonal to each other. For example, the sequence of pilot symbols in the X polarization direction is -A-Aj, -A-Aj, A+Aj, A-Aj, and the sequence of pilot symbols in the Y polarization direction is -A-Aj, -A-Aj, A+Aj, A+Aj. There is a difference in the pilot symbol sequences in the two polarization directions, which avoids the problem that the receiving end cannot distinguish the two polarization directions in actual transmission.

[0188] It should be noted that in a subframe, the sum of the real parts of all pilot symbols in one polarization direction is 0, and the sum of the imaginary parts of all pilot symbols in one polarization direction is 0. Therefore, the pilot symbol sequence in each subframe can achieve DC balance, which is beneficial for the receiving end to restore the signal quality.

[0189] It should be noted that in the first type of subframe, N FAW The sum of the real parts of the frame synchronization symbols except for the symbols that are both pilot symbols and frame synchronization symbols is 0. FAW The sum of the imaginary parts of the frame synchronization symbols except for the symbols that are both pilot symbols and frame synchronization symbols is 0. Therefore, the frame synchronization symbol sequence combined with the pilot symbol sequence in the first type of subframe is N FAW +N PS -1 symbol can achieve DC balance, which helps the receiving end to restore the signal quality.

[0190] In a possible scenario, in a subframe, the number of symbols in the pilot symbol sequence in a polarization direction whose values ​​are -A-Aj, -A+Aj, A-Aj and A+Aj differ from each other by less than or equal to 2, and the number of pilot symbols whose values ​​are -A-Aj is the same as the number of pilot symbols whose values ​​are A+Aj, and the number of pilot symbols whose values ​​are -A+Aj is the same as the number of pilot symbols whose values ​​are A-Aj, which effectively ensures that the number of pilot symbols in each polarization direction approaches balance, and can also ensure that the sequence composed of pilot symbols achieves DC balance, which is beneficial to the quality of signal recovery at the receiving end. For example, in a polarization direction, the number of -A-Aj is -The number of A+Aj is The number of A-Aj is The number of A+Aj is For example, in one polarization direction, the number of -A-Aj is -The number of A+Aj is The number of A-Aj is The number of A+Aj is For another example, in one polarization direction, the number of -A-Aj is -The number of A+Aj is The number of A-Aj is The number of A+Aj is For example, in one polarization direction, the number of -A-Aj is -The number of A+Aj is The number of A-Aj is The number of A+Aj is in, Indicates that the positive real number a is rounded down.

[0191] In one possible scenario, N PS is an integer multiple of 4. In one subframe, the number of symbols in the pilot symbol sequence in one polarization direction, which are -A-Aj, -A+Aj, A-Aj and A+Aj, is N. PS / 4, which effectively ensures the balance of the number of pilot symbols in each polarization direction and can also ensure that the sequence composed of pilot symbols achieves DC balance, which is beneficial to the quality of signal recovery at the receiving end.

[0192] In one possible scenario, in the first type of subframe, the frame synchronization symbols and pilot symbols in two polarization directions are N FAW +N PS -1 symbol is -A-Aj, frame synchronization symbols and pilot symbols in two polarization directions are N in total FAW +N PS-1 symbol is -A+Aj, frame synchronization symbols and pilot symbols in two polarization directions are N in total FAW +N PS -1 symbol is the number of A-Aj and the frame synchronization symbol and pilot symbol in both polarization directions are N FAW +N PS -1 symbols are the same, which effectively ensures the balance of the number of symbols in the two polarization directions. It should be understood that since the frame synchronization symbol sequence and the pilot symbol sequence in the first type of subframe share one symbol, the repeated common symbol needs to be subtracted when the frame synchronization symbol sequence and the pilot symbol sequence are combined to calculate the number of symbols, that is, the frame synchronization symbol sequence and the pilot symbol sequence have a total of N FAW +N PS -1 symbol.

[0193] As an example, N FAW +N PS -1 pilot symbol and frame synchronization symbol in two polarization directions are -A-Aj, respectively. and N FAW +N PS The sum of the number of -1 pilot symbols and frame synchronization symbols in the two polarization directions is -A-Aj (N FAW +N PS -1) / 2; N FAW +N PS -1 pilot symbol and frame synchronization symbol in two polarization directions are -A+Aj, respectively. and N FAW +N PS The sum of the number of -1 pilot symbols and frame synchronization symbols in the two polarization directions is -A+Aj (N FAW +N PS -1) / 2; N FAW +N PS -1 The number of pilot symbols and frame synchronization symbols in the two polarization directions is A-Aj respectively and N FAW +N PS -1 pilot symbol and frame synchronization symbol in two polarization directions A-Aj the sum of the number is (N FAW +N PS -1) / 2; N FAW +N PS -1 The number of pilot symbols and frame synchronization symbols in the two polarization directions is A+Aj respectively and N FAW +NPS -1 pilot symbol and frame synchronization symbol in two polarization directions is A+Aj, the sum of the number is (N FAW +N PS -1) / 2.

[0194] As another example, N FAW +N PS -1 pilot symbol and frame synchronization symbol in two polarization directions are -A-Aj, respectively. and N FAW +N PS The sum of the number of -1 pilot symbols and frame synchronization symbols in the two polarization directions is -A-Aj (N FAW +N PS -1) / 2; N FAW +N PS -1 pilot symbol and frame synchronization symbol in two polarization directions are -A+Aj, respectively. and N FAW +N PS The sum of the number of -1 pilot symbols and frame synchronization symbols in the two polarization directions is -A+Aj (N FAW +N PS -1) / 2; N FAW +N PS -1 The number of pilot symbols and frame synchronization symbols in the two polarization directions is A-Aj respectively and N FAW +N PS -1 pilot symbol and frame synchronization symbol in two polarization directions A-Aj the sum of the number is (N FAW +N PS -1) / 2; N FAW +N PS -1 The number of pilot symbols and frame synchronization symbols in the two polarization directions is A+Aj respectively and N FAW +N PS -1 pilot symbol and frame synchronization symbol in two polarization directions is A+Aj, the sum of the number is (N FAW +N PS -1) / 2.

[0195] It should be noted that, in the embodiment of the present application, the number N of pre-framing symbols in the superframe is CWThe values ​​of include but are not limited to 172032, 344064, 516096, 688128, 150528, 129024, 107520, 175616, 351232, 526848, 702464, 172032, 344064, 516096, 688128, 150528, 129024, 107520, 175616, 351232, 526848, and 702464.

[0196] 102. The transmitting end sends a superframe to the receiving end.

[0197] The superframe sent by the transmitter will reach the receiver through the channel transmission.

[0198] Fig. 9 Schematic diagram of simulating symbolic data flow in the embodiment of the present application. Fig. 9 As shown in some possible scenarios, after the digital to analog conversion (DAC), the superframe symbol data stream can be regarded as four analog symbol data streams, which are marked as X and I , X Q , Y I and Y Q Among them, X I Simulate symbolic data flow and X Q The analog symbol data streams correspond to the real part sequence data stream and the imaginary part sequence data stream in the X polarization direction respectively. I Simulate symbolic data flow and Y Q The analog symbol data streams correspond to the real part sequence data stream and the imaginary part sequence data stream in the Y polarization direction, respectively. It should be understood that the X polarization direction and the Y polarization direction (also referred to as the H polarization direction and the V polarization direction) are two mutually orthogonal polarization directions, and there are two mutually orthogonal phase channels in each polarization direction, namely I (In-phase) and Q (Quadrature), and I and Q correspond to the real part sequence data stream and the imaginary part sequence data stream, respectively.

[0199] 103. The receiving end decodes the superframe.

[0200] It should be understood that the specific operations after the receiving end receives the superframe are not described in detail in this application. Figure 1 Related introduction of .

[0201] The following introduces some specific examples of the number of symbols in different parts of the superframe provided in the embodiments of the present application.

[0202] (1) Number of symbols before framing N CW= 172032, for example, an open code (Open FEC, OFEC) encoding method with a coding redundancy of about 15.3% is used, and other encoding methods can also be used; each consecutive N PG = The first symbol among the 128 symbols is the pilot symbol. At this time, the number of subframes is N SF , the number of pilot symbols in each subframe N PS , the number of symbols in each subframe N S , the number of symbols in the superframe N F , superframe redundancy OH, the number of frame synchronization symbols N FAW and the number of reserved symbols N RES The sum of the parameters is as shown in Table 1, where N FAW +N PS is an odd number, N FAW is an odd number, N PS is an even number, the corresponding N RES >0,OH=(N F -N CW ) / N CW .

[0203] Except for OH, the other parameters are the number of symbols, which can be understood as the number of dual-polarization symbols or the number of symbols in one polarization direction; moreover, the number of different symbols in the two polarization directions is the same, for example, there are 10 frame synchronization symbols in one polarization direction and 10 frame synchronization symbols in the other polarization direction. Overall, there are 10 dual-polarization frame synchronization symbols. Subsequent tables can be understood in this way, and this application will not repeat them.

[0204] The frame redundancy of the superframe architecture in the case listed in Table 1 is low, OH<1.20%. Table 1 shows the number of symbols N in each subframe. S and the number of symbols in the superframe N F There is no limitation.

[0205] Table 1

[0206] Serial number <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW +N RES ]]> 1 136 10 1280 174080 1.19％ 689 2 113 12 1536 173568 0.89％ 181 3 97 14 1792 173824 1.04％ 435 4 85 16 2048 174080 1.19％ 689 5 68 20 2560 174080 1.19％ 689 6 40 34 4352 174080 1.19％ 689 7 34 40 5120 174080 1.19％ 689 8 20 68 8704 174080 1.19％ 689 9 17 80 10240 174080 1.19％ 689 10 10 136 17408 174080 1.19％ 689 11 8 170 21760 174080 1.19％ 689 12 7 194 24832 173824 1.04％ 435 13 6 226 28928 173568 0.89％ 181 14 5 272 34816 174080 1.19％ 689 15 4 340 43520 174080 1.19％ 689

[0207] In some specific applications, the bus width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, the number of symbols N in the superframe is F It should be an integer multiple of 192 and 128. It should be understood that when N PG = 128, that is, in each subframe, a symbol at a fixed position in every 128 consecutive symbols is used as a pilot symbol, the number of symbols in the superframe is N F and the number of symbols in each subframe N Smust be an integer multiple of 128. Therefore, when a symbol at a fixed position in every 128 consecutive symbols in each subframe is used as a pilot symbol, only the number of symbols N in the superframe needs to be considered. F It can be an integer multiple of 192. The subsequent tables indicating that a symbol at a fixed position in every 128 consecutive symbols in each subframe is a pilot symbol can be understood in this way, and this application will not repeat them. Considering the number of symbols N in the superframe F It should be an integer multiple of 192. Combining Table 1, we can get Table 2. The frame redundancy OH of the cases listed in Table 2 is less than 1.20%, and the number of symbols N in the superframe is F is an integer multiple of 192 and 128. In addition, Table 2 shows the number of symbols N in each subframe. S No limitation.

[0208] Table 2

[0209] Serial number <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW +N RES ]]> 1 113 12 1536 173568 0.89％ 181 2 6 226 28928 173568 0.89％ 181

[0210] In some specific applications, the bit width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, it is better to use not only the number of symbols N of the superframe F It should be an integer multiple of 192 and 128, and the number of symbols in each subframe is N. S It should also be an integer multiple of 192 and 128. It should be understood that if N S is an integer multiple of 192 and 128, then N F It must be an integer multiple of 192 and 128, but not necessarily the opposite. Consider the number of symbols N in each subframe S is an integer multiple of 192. Combining Table 2, we can get Table 3. The frame redundancy OH of the cases listed in Table 3 is less than 1.20%, and the number of symbols N in the superframe is F and the number of symbols in each subframe N S Both are integer multiples of 192 and 128.

[0211] Table 3

[0212] Serial number <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW +N RES ]]> 1 113 12 1536 173568 0.89％ 181

[0213] (2) Number of symbols before framing N CW =344064, for example, an open code (Open FEC, OFEC) encoding method with a coding redundancy of about 15.3% is adopted, and other encoding methods can also be adopted; each consecutive N PG = The first symbol among the 128 symbols is the pilot symbol. At this time, the number of subframes is N SF , the number of pilot symbols in each subframe N PS , the number of symbols in each subframe N S , the number of symbols in the superframe NF , superframe redundancy OH, the number of frame synchronization symbols N FAW and the number of reserved symbols N RES The sum of the parameters is as shown in Table 4, where N FAW +N PS is an odd number, N FAW is an odd number, N PS is an even number, the corresponding N RES >0,OH=(N F -N CW ) / N CW The frame redundancy of the superframe architecture in the case listed in Table 4 is low, OH<1.20%. Table 4 shows the number of symbols N in each subframe. S and the number of symbols in the superframe N F There is no limitation.

[0214] Table 4

[0215] Serial number <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW +N RES ]]> 1 271 10 1280 346880 0.82％ 107 2 226 12 1536 347136 0.89％ 361 3 194 14 1792 347648 1.04％ 869 4 170 16 2048 348160 1.19％ 1377 5 151 18 2304 347904 1.12％ 1123 6 136 20 2560 348160 1.19％ 1377 7 113 24 3072 347136 0.89％ 361 8 97 28 3584 347648 1.04％ 869 9 85 32 4096 348160 1.19％ 1377 10 80 34 4352 348160 1.19％ 1377 11 68 40 5120 348160 1.19％ 1377 12 59 46 5888 347392 0.97％ 615 13 40 68 8704 348160 1.19％ 1377 14 34 80 10240 348160 1.19％ 1377 15 23 118 15104 347392 0.97％ 615 16 20 136 17408 348160 1.19％ 1377 17 17 160 20480 348160 1.19％ 1377 18 16 170 21760 348160 1.19％ 1377 19 14 194 24832 347648 1.04％ 869 20 12 226 28928 347136 0.89％ 361 21 10 272 34816 348160 1.19％ 1377 22 9 302 38656 347904 1.12％ 1123 23 8 340 43520 348160 1.19％ 1377 24 7 388 49664 347648 1.04％ 869

[0216] In some specific applications, the bit width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, the number of symbols N in the superframe is F It should be an integer multiple of 192 and 128. Consider the number of symbols N in the superframe F It should be an integer multiple of 192. Combining Table 4, we can get Table 5. The frame redundancy OH of the cases listed in Table 5 is less than 1.20%, and the number of symbols N in the superframe is F is an integer multiple of 192 and 128. In addition, Table 5 gives the number of symbols N in each subframe. S No limitation.

[0217] Table 5

[0218]

[0219]

[0220] In some specific applications, the bit width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, it is better to use not only the number of symbols N of the superframe F It should be an integer multiple of 192 and 128, and the number of symbols in each subframe is N. S It should also be an integer multiple of 192 and 128. It should be understood that if N S is an integer multiple of 192 and 128, then N F It must be an integer multiple of 192 and 128, but not necessarily the opposite. Consider the number of symbols N in each subframe Sis an integer multiple of 192. Combining Table 5, we can get Table 6. The frame redundancy OH of the cases listed in Table 6 is less than 1.20%, and the number of symbols N in the superframe is F and the number of symbols in each subframe N S Both are integer multiples of 192 and 128.

[0221] Table 6

[0222] Serial number <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW +N RES ]]> 1 226 12 1536 347136 0.89％ 361 2 151 18 2304 347904 1.12％ 1123 3 113 24 3072 347136 0.89％ 361

[0223] (3) Number of symbols before framing N CW =516096, for example, an open code (Open FEC, OFEC) encoding method with a coding redundancy of about 15.3% is used, and other encoding methods can also be used; each consecutive N PG = The first symbol among the 128 symbols is the pilot symbol. At this time, the number of subframes is N SF , the number of pilot symbols in each subframe N PS , the number of symbols in each subframe N S , the number of symbols in the superframe N F , superframe redundancy OH, the number of frame synchronization symbols N FAW and the number of reserved symbols N RES The sum of the parameters is as shown in Table 7, where N FAW +N PS is an odd number, N FAW is an odd number, N PS is an even number, the corresponding N RES >0,OH=(N F -N CW ) / N CW .

[0224] The frame redundancy of the superframe architecture in the case listed in Table 7 is low, OH<1.20%. Table 7 shows the number of symbols N in each subframe. S and the number of symbols in the superframe N F There is no limitation.

[0225] Table 7

[0226]

[0227]

[0228] In some specific applications, the bit width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, the number of symbols N in the superframe is F It should be an integer multiple of 192 and 128. Consider the number of symbols N in the superframe FIt should be an integer multiple of 192. Combining Table 7, we can get Table 8. The frame redundancy OH of the cases listed in Table 8 is less than 1.20%, and the number of symbols N in the superframe is F is an integer multiple of 192 and 128. In addition, Table 8 gives the number of symbols N in each subframe. S No limitation.

[0229] Table 8

[0230] Serial number <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW +N RES ]]> 1 339 12 1536 520704 0.89％ 541 2 291 14 1792 521472 1.04％ 1303 3 226 18 2304 520704 0.89％ 541 4 204 20 2560 522240 1.19％ 2065 5 170 24 3072 522240 1.19％ 2065 6 136 30 3840 522240 1.19％ 2065 7 120 34 4352 522240 1.19％ 2065 8 113 36 4608 520704 0.89％ 541 9 102 40 5120 522240 1.19％ 2065 10 97 42 5376 521472 1.04％ 1303 11 85 48 6144 522240 1.19％ 2065 12 68 60 7680 522240 1.19％ 2065 13 60 68 8704 522240 1.19％ 2065 14 51 80 10240 522240 1.19％ 2065 15 40 102 13056 522240 1.19％ 2065 16 34 120 15360 522240 1.19％ 2065 17 30 136 17408 522240 1.19％ 2065 18 24 170 21760 522240 1.19％ 2065 19 21 194 24832 521472 1.04％ 1303 20 20 204 26112 522240 1.19％ 2065 21 18 226 28928 520704 0.89％ 541 22 17 240 30720 522240 1.19％ 2065 23 15 272 34816 522240 1.19％ 2065 24 12 340 43520 522240 1.19％ 2065

[0231] In some specific applications, the bit width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, it is better to use not only the number of symbols N of the superframe F It should be an integer multiple of 192 and 128, and the number of symbols in each subframe is N. S It should also be an integer multiple of 192 and 128. It should be understood that if N S is an integer multiple of 192 and 128, then N F It must be an integer multiple of 192 and 128, but not necessarily the opposite. Consider the number of symbols N in each subframe S is an integer multiple of 192, combined with Table 8, we can get Table 9. The frame redundancy OH of the cases listed in Table 9 is less than 1.20%, and the number of symbols N in the superframe is F and the number of symbols in each subframe N S Both are integer multiples of 192 and 128.

[0232] Table 9

[0233] Serial number <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW +N RES ]]> 1 339 12 1536 520704 0.89％ 541 2 226 18 2304 520704 0.89％ 541 3 170 24 3072 522240 1.19％ 2065 4 136 30 3840 522240 1.19％ 2065 5 113 36 4608 520704 0.89％ 541 6 97 42 5376 521472 1.04％ 1303 7 85 48 6144 522240 1.19％ 2065 8 68 60 7680 522240 1.19％ 2065 9 40 102 13056 522240 1.19％ 2065 10 34 120 15360 522240 1.19％ 2065 11 20 204 26112 522240 1.19％ 2065 12 17 240 30720 522240 1.19％ 2065

[0234] (4) Number of symbols before framing N CW =688128, for example, an open code (Open FEC, OFEC) encoding method with a coding redundancy of about 15.3% is used, and other encoding methods can also be used; each consecutive N PG = The first symbol among the 128 symbols is the pilot symbol. At this time, the number of subframes is N SF , the number of pilot symbols in each subframe N PS , the number of symbols in each subframe N S , the number of symbols in the superframe N F , superframe redundancy OH, the number of frame synchronization symbols N FAW and the number of reserved symbols N RES The sum of the parameters is as shown in Table 10, where N FAW +N PS is an odd number, N FAW is an odd number, N PS is an even number, the corresponding N RES>0,OH=(N F -N CW ) / N CW .

[0235] The frame redundancy of the superframe architecture in the case listed in Table 10 is low, OH<1.20%. Table 10 shows the number of symbols N in each subframe. S and the number of symbols in the superframe N F There is no limitation.

[0236] Table 10

[0237]

[0238]

[0239] In some specific applications, the bit width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, the number of symbols N in the superframe is F It should be an integer multiple of 192 and 128. Consider the number of symbols N in the superframe F It should be an integer multiple of 192. Combining Table 10, we can get Table 11. The frame redundancy OH of the cases listed in Table 11 is less than 1.20%, and the number of symbols N in the superframe is F is an integer multiple of 192 and 128. In addition, Table 11 gives the number of symbols N in each subframe. S No limitation.

[0240] Table 11

[0241] Serial number <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW +N RES ]]> 1 452 12 1536 694272 0.89％ 721 2 339 16 2048 694272 0.89％ 721 3 302 18 2304 695808 1.12％ 2245 4 226 24 3072 694272 0.89％ 721 5 181 30 3840 695040 1.00％ 1483 6 151 36 4608 695808 1.12％ 2245 7 113 48 6144 694272 0.89％ 721 8 24 226 28928 694272 0.89％ 721 9 18 302 38656 695808 1.12％ 2245 10 15 362 46336 695040 1.00％ 1483

[0242] In some specific applications, the bit width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, it is better to use not only the number of symbols N of the superframe F It should be an integer multiple of 192 and 128, and the number of symbols in each subframe is N. S It should also be an integer multiple of 192 and 128. It should be understood that if N S is an integer multiple of 192 and 128, then N F It must be an integer multiple of 192 and 128, but not necessarily the opposite. Consider the number of symbols N in each subframe S is an integer multiple of 192, combined with Table 11, we can get Table 12. Then the frame redundancy OH of the cases listed in Table 12 is less than 1.20%, and the number of symbols N in the superframe is F and the number of symbols in each subframe N S Both are integer multiples of 192 and 128.

[0243] Table 12

[0244] Serial number <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW +N RES ]]> 1 452 12 1536 694272 0.89％ 721 2 302 18 2304 695808 1.12％ 2245 3 226 24 3072 694272 0.89％ 721 4 181 30 3840 695040 1.00％ 1483 5 151 36 4608 695808 1.12％ 2245 6 113 48 6144 694272 0.89％ 721

[0245] (5) Number of symbols before framing N CW = 150528, for example, an open code (Open FEC, OFEC) encoding method with a coding redundancy of about 17.9% is used, and other encoding methods can also be used; each consecutive N PG = The first symbol among the 128 symbols is the pilot symbol. At this time, the number of subframes is N SF , the number of pilot symbols in each subframe N PS , the number of symbols in each subframe N S , the number of symbols in the superframe N F , superframe redundancy OH, the number of frame synchronization symbols N FAW and the number of reserved symbols N RES The sum of the parameters is as shown in Table 13, where N FAW +N PS is an odd number, N FAW is an odd number, N PS is an even number, the corresponding N RES >0,OH=(N F -N CW ) / N CW .

[0246] The frame redundancy of the superframe structure of the case listed in Table 13 is low, OH<1.20%. Table 13 shows the number of symbols N in each subframe. S and the number of symbols in the superframe N F There is no limitation.

[0247] Table 13

[0248] Serial number <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW +N RES ]]> 1 119 10 1280 152320 1.19％ 603 2 99 12 1536 152064 1.02％ 349 3 85 14 1792 152320 1.19％ 603 4 66 18 2304 152064 1.02％ 349 5 54 22 2816 152064 1.02％ 349 6 35 34 4352 152320 1.19％ 603 7 33 36 4608 152064 1.02％ 349 8 27 44 5632 152064 1.02％ 349 9 22 54 6912 152064 1.02％ 349 10 18 66 8448 152064 1.02％ 349 11 17 70 8960 152320 1.19％ 603 12 11 108 13824 152064 1.02％ 349 13 9 132 16896 152064 1.02％ 349 14 7 170 21760 152320 1.19％ 603 15 6 198 25344 152064 1.02％ 349 16 5 238 30464 152320 1.19％ 603 17 3 396 50688 152064 1.02％ 349

[0249] In some specific applications, the bit width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, the number of symbols N in the superframe is F It should be an integer multiple of 192 and 128. Consider the number of symbols N in the superframe F It should be an integer multiple of 192. Combining Table 13, we can get Table 14. The frame redundancy OH of the cases listed in Table 14 is less than 1.20%, and the number of symbols N in the superframe is F is an integer multiple of 192 and 128. In addition, Table 14 shows the number of symbols N in each subframe. S No limitation.

[0250] Table 14

[0251]

[0252]

[0253] In some specific applications, the bit width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, it is better to use not only the number of symbols N of the superframe F It should be an integer multiple of 192 and 128, and the number of symbols in each subframe is N. S It should also be an integer multiple of 192 and 128. It should be understood that if N S is an integer multiple of 192 and 128, then N F It must be an integer multiple of 192 and 128, but not necessarily the opposite. Consider the number of symbols N in each subframe S is an integer multiple of 192, combined with Table 14, we can get Table 15. Then the frame redundancy OH of the case listed in Table 15 is less than 1.20%, and the number of symbols N in the superframe is F and the number of symbols in each subframe N S Both are integer multiples of 192 and 128.

[0254] Table 15

[0255] Serial number <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW +N RES <!-- 24 -->]]> 1 99 12 1536 152064 1.02％ 349 2 66 18 2304 152064 1.02％ 349 3 33 36 4608 152064 1.02％ 349 4 22 54 6912 152064 1.02％ 349 5 18 66 8448 152064 1.02％ 349 6 11 108 13824 152064 1.02％ 349 7 9 132 16896 152064 1.02％ 349 8 6 198 25344 152064 1.02％ 349 9 3 396 50688 152064 1.02％ 349

[0256] (6) Number of symbols before framing N CW = 129024, for example, an open code (Open FEC, OFEC) encoding method with a coding redundancy of about 21.5% is used, and other encoding methods can also be used; each consecutive N PG = The first symbol among the 128 symbols is the pilot symbol. At this time, the number of subframes is N SF , the number of pilot symbols in each subframe N PS , the number of symbols in each subframe N S , the number of symbols in the superframe N F , superframe redundancy OH, the number of frame synchronization symbols N FAW and the number of reserved symbols N RES The sum of the parameters is as shown in Table 16, where N FAW +N PS is an odd number, N FAW is an odd number, N PS is an even number, the corresponding N RES >0,OH=(N F -N CW ) / N CW .

[0257] The frame redundancy of the superframe structure of the case listed in Table 16 is low, OH<1.20%. Table 16 shows the number of symbols N in each subframe. S and the number of symbols in the superframe N FIn some specific applications, the bit width of the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, the number of symbols N in the superframe is F It should be an integer multiple of 192 and 128. It should be noted that the number of symbols N in each subframe for all cases listed in Table 16 is F are integer multiples of 192 and 128; in this case (6) there is no superframe symbol number N F The number is not an integer multiple of 192 or 128.

[0258] Table 16

[0259]

[0260]

[0261] In some specific applications, the bit width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, it is better to use not only the number of symbols N of the superframe F It should be an integer multiple of 192 and 128, and the number of symbols in each subframe is N. S It should also be an integer multiple of 192 and 128. It should be understood that if N S is an integer multiple of 192 and 128, then N F It must be an integer multiple of 192 and 128, but not necessarily the opposite. Consider the number of symbols N in each subframe S is an integer multiple of 192, combined with Table 16, we can get Table 17. Then the frame redundancy OH of the case listed in Table 17 is less than 1.20%, and the number of symbols N in the superframe is F and the number of symbols in each subframe N S Both are integer multiples of 192 and 128.

[0262] Table 17

[0263] Serial number <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW +N RES ]]> 1 85 12 1536 130560 1.19％ 517 2 34 30 3840 130560 1.19％ 517 3 17 60 7680 130560 1.19％ 517 4 10 102 13056 130560 1.19％ 517 5 5 204 26112 130560 1.19％ 517

[0264] (7) Number of symbols before framing N CW = 107520, for example, an open code (Open FEC, OFEC) encoding method with a coding redundancy of about 27.0% is used, and other encoding methods can also be used; each consecutive N PG = The first symbol among the 128 symbols is the pilot symbol. At this time, the number of subframes is N SF , the number of pilot symbols in each subframe N PS , the number of symbols in each subframe N S , the number of symbols in the superframe N F , superframe redundancy OH, the number of frame synchronization symbols N FAWand the number of reserved symbols N RES The sum of the parameters is as shown in Table 18, where N FAW +N PS is an odd number, N FAW is an odd number, N PS is an even number, the corresponding N RES >0,OH=(N F -N CW ) / N CW .

[0265] The frame redundancy of the superframe structure of the case listed in Table 18 is low, OH<1.20%. Table 18 shows the number of symbols N in each subframe. S and the number of symbols in the superframe N F It should be noted that the number of symbols N in each subframe for all cases listed in this table is F and the number of symbols in each subframe N S are not integer multiples of 192 and 128; in this case (7) there is no superframe symbol number N F When the number N is an integer multiple of 192 and 128, there is no superframe symbol number N. F and the number of symbols in each subframe N S Both are integer multiples of 192 and 128.

[0266] Table 18

[0267] Serial number <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW +N RES ]]> 1 85 10 1280 108800 1.19％ 431 2 53 16 2048 108544 0.95％ 177 3 25 34 4352 108800 1.19％ 431 4 17 50 6400 108800 1.19％ 431 5 8 106 13568 108544 0.95％ 177 6 5 170 21760 108800 1.19％ 431 7 4 212 27136 108544 0.95％ 177

[0268] (8) Number of symbols before framing N CW =175616, for example, a CFEC encoding method with a coding redundancy of about 15.3% is used, or other encoding methods may be used; each consecutive N PG = The first symbol among the 128 symbols is the pilot symbol. At this time, the number of subframes is N SF , the number of pilot symbols in each subframe N PS , the number of symbols in each subframe N S , the number of symbols in the superframe N F , superframe redundancy OH, the number of frame synchronization symbols N FAW and the number of reserved symbols N RES The sum of the parameters is as shown in Table 19, where N FAW +N PS is an odd number, N FAW is an odd number, N PS is an even number, the corresponding N RES >0,OH=(N F -N CW ) / N CW .

[0269] The frame redundancy of the superframe structure of the case listed in Table 19 is low, OH<1.20%. Table 19 shows the number of symbols N in each subframe. S and the number of symbols in the superframe N F There is no limitation.

[0270] Table 19

[0271]

[0272]

[0273] In some specific applications, the bit width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, the number of symbols N in the superframe is F It should be an integer multiple of 192 and 128. Consider the number of symbols N in the superframe F It should be an integer multiple of 192. Combining Table 19, we can get Table 20. The frame redundancy OH of the cases listed in Table 20 is less than 1.20%, and the number of symbols N in the superframe is F is an integer multiple of 192 and 128. In addition, Table 20 gives the number of symbols N in each subframe. S No limitation.

[0274] Table 20

[0275] Serial number <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW +N RES ]]> 1 99 14 1792 177408 1.02％ 407 2 77 18 2304 177408 1.02％ 407 3 63 22 2816 177408 1.02％ 407 4 33 42 5376 177408 1.02％ 407 5 21 66 8448 177408 1.02％ 407 6 11 126 16128 177408 1.02％ 407 7 9 154 19712 177408 1.02％ 407 8 7 198 25344 177408 1.02％ 407

[0276] In some specific applications, the bit width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, it is better to use not only the number of symbols N of the superframe F It should be an integer multiple of 192 and 128, and the number of symbols in each subframe is N. S It should also be an integer multiple of 192 and 128. It should be understood that if N S is an integer multiple of 192 and 128, then N F It must be an integer multiple of 192 and 128, but not necessarily the opposite. Consider the number of symbols N in each subframe S is an integer multiple of 192, combined with Table 20, Table 21 can be obtained. The frame redundancy OH of the case listed in Table 21 is less than 1.20%, and the number of symbols N in the superframe is F and the number of symbols in each subframe N S Both are integer multiples of 192 and 128.

[0277] Table 21

[0278] Serial number <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW +N RES ]]> 1 77 18 2304 177408 1.02％ 407 2 33 42 5376 177408 1.02％ 407 3 21 66 8448 177408 1.02％ 407 4 11 126 16128 177408 1.02％ 407 5 7 198 25344 177408 1.02％ 407

[0279] (9) Number of symbols before framing N CW=351232, for example, an open code (Open FEC, OFEC) encoding method with a coding redundancy of about 15.3% is used, and other encoding methods can also be used; each consecutive N PG = The first symbol among the 128 symbols is the pilot symbol. At this time, the number of subframes is N SF , the number of pilot symbols in each subframe N PS , the number of symbols in each subframe N S , the number of symbols in the superframe N F , superframe redundancy OH, the number of frame synchronization symbols N FAW and the number of reserved symbols N RES The sum of the parameters is as shown in Table 22, where N FAW +N PS is an odd number, N FAW is an odd number, N PS is an even number, the corresponding N RES >0,OH=(N F -N CW ) / N CW .

[0280] The frame redundancy of the superframe structure of the case listed in Table 22 is low, OH<1.20%. Table 22 shows the number of symbols N in each subframe. S and the number of symbols in the superframe N F There is no limitation.

[0281] Table 22

[0282] Serial number <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW +N RES ]]> 1 277 10 1280 354560 0.95％ 559 2 231 12 1536 354816 1.02％ 813 3 198 14 1792 354816 1.02％ 813 4 173 16 2048 354304 0.87％ 305 5 154 18 2304 354816 1.02％ 813 6 126 22 2816 354816 1.02％ 813 7 99 28 3584 354816 1.02％ 813 8 77 36 4608 354816 1.02％ 813 9 73 38 4864 355072 1.09％ 1067 10 66 42 5376 354816 1.02％ 813 11 63 44 5632 354816 1.02％ 813 12 42 66 8448 354816 1.02％ 813 13 33 84 10752 354816 1.02％ 813 14 22 126 16128 354816 1.02％ 813 15 21 132 16896 354816 1.02％ 813 16 19 146 18688 355072 1.09％ 1067 17 18 154 19712 354816 1.02％ 813 18 14 198 25344 354816 1.02％ 813 19 11 252 32256 354816 1.02％ 813 20 9 308 39424 354816 1.02％ 813 21 8 346 44288 354304 0.87％ 305 22 7 396 50688 354816 1.02％ 813

[0283] In some specific applications, the bit width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, the number of symbols N in the superframe is F It should be an integer multiple of 192 and 128. Consider the number of symbols N in the superframe F It should be an integer multiple of 192. Combining Table 22, we can get Table 23. The frame redundancy OH of the cases listed in Table 23 is less than 1.20%, and the number of symbols N in the superframe is F is an integer multiple of 192 and 128. In addition, Table 23 shows the number of symbols N in each subframe. S No limitation.

[0284] Table 23

[0285]

[0286]

[0287] In some specific applications, the bit width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, it is better to use not only the number of symbols N of the superframe F It should be an integer multiple of 192 and 128, and the number of symbols in each subframe is N. S It should also be an integer multiple of 192 and 128. It should be understood that if N S is an integer multiple of 192 and 128, then N F It must be an integer multiple of 192 and 128, but not necessarily the opposite. Consider the number of symbols N in each subframe S is an integer multiple of 192, combined with Table 23, we can get Table 24. Then the frame redundancy OH of the case listed in Table 24 is less than 1.20%, and the number of symbols N in the superframe is F and the number of symbols in each subframe N S Both are integer multiples of 192 and 128.

[0288] Table 24

[0289] Serial number <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW +N RES ]]> 1 231 12 1536 354816 1.02％ 813 2 154 18 2304 354816 1.02％ 813 3 77 36 4608 354816 1.02％ 813 4 66 42 5376 354816 1.02％ 813 5 42 66 8448 354816 1.02％ 813 6 33 84 10752 354816 1.02％ 813 7 22 126 16128 354816 1.02％ 813 8 21 132 16896 354816 1.02％ 813 9 14 198 25344 354816 1.02％ 813 10 11 252 32256 354816 1.02％ 813 11 7 396 50688 354816 1.02％ 813

[0290] (10) Number of symbols before framing N CW =526848, for example, an open code (Open FEC, OFEC) encoding method with a coding redundancy of about 15.3% is used, and other encoding methods can also be used; each consecutive N PG = The first symbol among the 128 symbols is the pilot symbol. At this time, the number of subframes is N SF , the number of pilot symbols in each subframe N PS , the number of symbols in each subframe N S , the number of symbols in the superframe N F , superframe redundancy OH, the number of frame synchronization symbols N FAW and the number of reserved symbols N RES The sum of the parameters is as shown in Table 25, where N FAW +N PS is an odd number, N FAW is an odd number, N PS is an even number, the corresponding N RES >0,OH=(N F -N CW ) / N CW .

[0291] The frame redundancy of the superframe structure of the case listed in Table 25 is low, OH<1.20%. Table 25 shows the number of symbols N in each subframe. S and the number of symbols in the superframe N F There is no limitation.

[0292] Table 25

[0293]

[0294]

[0295] In some specific applications, the bit width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, the number of symbols N in the superframe is F It should be an integer multiple of 192 and 128. Consider the number of symbols N in the superframe F It should be an integer multiple of 192. Combining Table 25, we can get Table 26. The frame redundancy OH of the cases listed in Table 26 is less than 1.20%, and the number of symbols N in the superframe is F is an integer multiple of 192 and 128. In addition, Table 26 gives the number of symbols N in each subframe. S No limitation.

[0296] Table 26

[0297] Serial number <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW +N RES ]]> 1 346 12 1536 531456 0.87％ 457 2 297 14 1792 532224 1.02％ 1219 3 231 18 2304 532224 1.02％ 1219 4 189 22 2816 532224 1.02％ 1219 5 173 24 3072 531456 0.87％ 457 6 99 42 5376 532224 1.02％ 1219 7 77 54 6912 532224 1.02％ 1219 8 63 66 8448 532224 1.02％ 1219 9 33 126 16128 532224 1.02％ 1219 10 27 154 19712 532224 1.02％ 1219 11 21 198 25344 532224 1.02％ 1219 12 12 346 44288 531456 0.87％ 457 13 11 378 48384 532224 1.02％ 1219

[0298] In some specific applications, the bit width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, it is better to use not only the number of symbols N of the superframe F It should be an integer multiple of 192 and 128, and the number of symbols in each subframe is N. S It should also be an integer multiple of 192 and 128. It should be understood that if N S is an integer multiple of 192 and 128, then N F It must be an integer multiple of 192 and 128, but not necessarily the opposite. Consider the number of symbols N in each subframe S is an integer multiple of 192, combined with Table 26, we can get Table 27. Then the frame redundancy OH of the case listed in Table 27 is less than 1.20%, and the number of symbols N in the superframe is F and the number of symbols in each subframe N S Both are integer multiples of 192 and 128.

[0299] Table 27

[0300]

[0301]

[0302] (11) Number of symbols before framing N CW =702464, for example, an open code (Open FEC, OFEC) encoding method with a coding redundancy of about 15.3% is used, and other encoding methods can also be used; each consecutive N PG= The first symbol among the 128 symbols is the pilot symbol. At this time, the number of subframes is N SF , the number of pilot symbols in each subframe N PS , the number of symbols in each subframe N S , the number of symbols in the superframe N F , superframe redundancy OH, the number of frame synchronization symbols N FAW and the number of reserved symbols N RES The sum of the parameters is as shown in Table 28, where N FAW +N PS is an odd number, N FAW is an odd number, N PS is an even number, the corresponding N RES >0,OH=(N F -N CW ) / N CW .

[0303] The frame redundancy of the superframe structure of the case listed in Table 28 is lower than OH<1.20%. Table 28 shows the number of symbols N in each subframe. S and the number of symbols in the superframe N F There is no limitation.

[0304] Table 28

[0305]

[0306]

[0307] In some specific applications, the bit width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, the number of symbols N in the superframe is F It should be an integer multiple of 192 and 128. Consider the number of symbols N in the superframe F It should be an integer multiple of 192. Combined with Table 28, Table 29 can be obtained. The frame redundancy OH of the case listed in Table 29 is less than 1.20%, and the number of symbols N in the superframe is F is an integer multiple of 192 and 128. In addition, Table 29 gives the number of symbols N in each subframe. S No limitation.

[0308] Table 29

[0309]

[0310]

[0311] In some specific applications, the bit width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, it is better to use not only the number of symbols N of the superframe FIt should be an integer multiple of 192 and 128, and the number of symbols in each subframe is N. S It should also be an integer multiple of 192 and 128. It should be understood that if N S is an integer multiple of 192 and 128, then N F It must be an integer multiple of 192 and 128, but not necessarily the opposite. Consider the number of symbols N in each subframe S is an integer multiple of 192, combined with Table 29, we can get Table 30. Then the frame redundancy OH of the case listed in Table 30 is less than 1.20%, and the number of symbols N in the superframe is F and the number of symbols in each subframe N S Both are integer multiples of 192 and 128.

[0312] Table 30

[0313] Serial number <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW +N RES ]]> 1 461 12 1536 708096 0.80％ 101 2 308 18 2304 709632 1.02％ 1625 3 231 24 3072 709632 1.02％ 1625 4 185 30 3840 710400 1.13％ 2387 5 154 36 4608 709632 1.02％ 1625 6 132 42 5376 709632 1.02％ 1625 7 84 66 8448 709632 1.02％ 1625 8 77 72 9216 709632 1.02％ 1625 9 71 78 9984 708864 0.91％ 863 10 66 84 10752 709632 1.02％ 1625 11 44 126 16128 709632 1.02％ 1625 12 42 132 16896 709632 1.02％ 1625 13 37 150 19200 710400 1.13％ 2387 14 33 168 21504 709632 1.02％ 1625 15 28 198 25344 709632 1.02％ 1625 16 25 222 28416 710400 1.13％ 2387 17 22 252 32256 709632 1.02％ 1625 18 21 264 33792 709632 1.02％ 1625 19 14 396 50688 709632 1.02％ 1625

[0314] (12) Number of symbols before framing N CW = 172032, for example, an open code (Open FEC, OFEC) encoding method with a coding redundancy of about 15.3% is used, and other encoding methods can also be used; each consecutive N PG = The first symbol among the 96 symbols is the pilot symbol. At this time, the number of subframes is N SF , the number of pilot symbols in each subframe N PS , the number of symbols in each subframe N S , the number of symbols in the superframe N F , superframe redundancy OH, the number of frame synchronization symbols N FAW and the number of reserved symbols N RES The sum of the parameters is as shown in Table 31, where N FAW +N PS is an odd number, N FAW is an odd number, N PS is an even number, the corresponding N RES >0,OH=(N F -N CW ) / N CW .

[0315] The frame redundancy of the superframe structure of the case listed in Table 31 is low, OH<1.50%. Table 31 shows the number of symbols N in each subframe. S and the number of symbols in the superframe N F There is no limitation.

[0316] Table 31

[0317] Serial number <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW +N RES ]]> 1 151 12 1152 173952 1.12％ 109 2 101 18 1728 174528 1.45％ 679 3 9 202 19392 174528 1.45％ 679 4 6 302 28992 173952 1.12％ 109

[0318] In some specific applications, the bit width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, the number of symbols N in the superframe is F It should be an integer multiple of 192 and 128. Consider the number of symbols N in the superframe F It should be an integer multiple of 192 and 128. Combining Table 31, we can get Table 32. The frame redundancy OH of the cases listed in Table 32 is less than 1.50%, and the number of symbols N in the superframe is F is an integer multiple of 192 and 128. In addition, Table 32 gives the number of symbols N in each subframe. S No limitation.

[0319] Table 32

[0320] Serial number <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW +N RES ]]> 1 151 12 1152 173952 1.12％ 109 2 6 302 28992 173952 1.12％ 109

[0321] In some specific applications, the bit width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, it is better to use not only the number of symbols N of the superframe F It should be an integer multiple of 192 and 128, and the number of symbols in each subframe is N. S It should also be an integer multiple of 192 and 128. It should be understood that if N S is an integer multiple of 192 and 128, then N F It must be an integer multiple of 192 and 128, but not necessarily the opposite. Consider the number of symbols N in each subframe S is an integer multiple of 192 and 128, combined with Table 32, we can get Table 33. Then the frame redundancy OH of the case listed in Table 33 is less than 1.50%, and the number of symbols N of the superframe F and the number of symbols in each subframe N S Both are integer multiples of 192 and 128.

[0322] Table 33

[0323] Serial number <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW +N RES ]]> 1 151 12 1152 173952 1.12％ 109

[0324] (13) Number of symbols before framing N CW =344064, for example, an open code (Open FEC, OFEC) encoding method with a coding redundancy of about 15.3% is adopted, and other encoding methods can also be adopted; each consecutive N PG = The first symbol among the 96 symbols is the pilot symbol. At this time, the number of subframes is N SF , the number of pilot symbols in each subframe N PS , the number of symbols in each subframe N S , the number of symbols in the superframe N F , superframe redundancy OH, the number of frame synchronization symbols N FAWand the number of reserved symbols N RES The sum of the parameters is as shown in Table 34, where N FAW +N PS is an odd number, N FAW is an odd number, N PS is an even number, the corresponding N RES >0,OH=(N F -N CW ) / N CW .

[0325] The frame redundancy of the superframe structure of the case listed in Table 34 is lower than OH<1.50%. Table 34 shows the number of symbols N in each subframe. S and the number of symbols in the superframe N F There is no limitation.

[0326] Table 34

[0327]

[0328]

[0329] In some specific applications, the bit width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, the number of symbols N in the superframe is F It should be an integer multiple of 192 and 128. Consider the number of symbols N in the superframe F It should be an integer multiple of 192 and 128. Combining Table 34, we can get Table 35. The frame redundancy OH of the case listed in Table 35 is less than 1.50%, and the number of symbols N in the superframe is F is an integer multiple of 192 and 128. In addition, Table 35 gives the number of symbols N in each subframe. S No limitation.

[0330] Table 35

[0331] Serial number <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW +N RES ]]> 1 302 12 1152 347904 1.12％ 217 2 227 16 1536 348672 1.34％ 977 3 202 18 1728 349056 1.45％ 1357 4 151 24 2304 347904 1.12％ 217 5 101 36 3456 349056 1.45％ 1357 6 18 202 19392 349056 1.45％ 1357 7 12 302 28992 347904 1.12％ 217

[0332] In some specific applications, the bit width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, it is better to use not only the number of symbols N of the superframe F It should be an integer multiple of 192 and 128, and the number of symbols in each subframe is N. S It should also be an integer multiple of 192 and 128. It should be understood that if N S is an integer multiple of 192 and 128, then N F It must be an integer multiple of 192 and 128, but not necessarily the opposite. Consider the number of symbols N in each subframe Sis an integer multiple of 192 and 128, combined with Table 35, Table 36 can be obtained. Then the frame redundancy OH of the case listed in Table 36 is less than 1.50%, and the number of symbols N in the superframe F and the number of symbols in each subframe N S Both are integer multiples of 192 and 128.

[0333] Table 36

[0334] Serial number <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW +N RES ]]> 1 302 12 1152 347904 1.12％ 217 2 227 16 1536 348672 1.34％ 977 3 151 24 2304 347904 1.12％ 217 4 101 36 3456 349056 1.45％ 1357

[0335] (14) Number of symbols before framing N CW =516096, for example, an open code (Open FEC, OFEC) encoding method with a coding redundancy of about 15.3% is used, and other encoding methods can also be used; each consecutive N PG = The first symbol among the 96 symbols is the pilot symbol. At this time, the number of subframes is N SF , the number of pilot symbols in each subframe N PS , the number of symbols in each subframe N S , the number of symbols in the superframe N F , superframe redundancy OH, the number of frame synchronization symbols N FAW and the number of reserved symbols N RES The sum of the parameters is as shown in Table 37, where N FAW +N PS is an odd number, N FAW is an odd number, N PS is an even number, the corresponding N RES >0,OH=(N F -N CW ) / N CW .

[0336] The frame redundancy of the superframe structure of the case listed in Table 37 is lower than OH<1.50%. Table 37 shows the number of symbols N in each subframe. S and the number of symbols in the superframe N F There is no limitation.

[0337] Table 37

[0338] Serial number <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW +N RES ]]> 1 544 10 960 522240 1.19％ 705 2 453 12 1152 521856 1.12％ 325 3 389 14 1344 522816 1.30％ 1275 4 340 16 1536 522240 1.19％ 705 5 302 18 1728 521856 1.12％ 325 6 272 20 1920 522240 1.19％ 705 7 247 22 2112 521664 1.08％ 135 8 227 24 2304 523008 1.34％ 1465 9 209 26 2496 521664 1.08％ 135 10 170 32 3072 522240 1.19％ 705 11 160 34 3264 522240 1.19％ 705 12 151 36 3456 521856 1.12％ 325 13 143 38 3648 521664 1.08％ 135 14 136 40 3840 522240 1.19％ 705 15 124 44 4224 523776 1.49％ 2225 16 109 50 4800 523200 1.38％ 1655 17 101 54 5184 523584 1.45％ 2035 18 94 58 5568 523392 1.41％ 1845 19 88 62 5952 523776 1.49％ 2225 20 85 64 6144 522240 1.19％ 705 21 80 68 6528 522240 1.19％ 705 22 68 80 7680 522240 1.19％ 705 23 62 88 8448 523776 1.49％ 2225 24 58 94 9024 523392 1.41％ 1845 25 47 116 11136 523392 1.41％ 1845 26 44 124 11904 523776 1.49％ 2225 27 40 136 13056 522240 1.19％ 705 28 34 160 15360 522240 1.19％ 705 29 32 170 16320 522240 1.19％ 705 30 31 176 16896 523776 1.49％ 2225 31 29 188 18048 523392 1.41％ 1845 32 27 202 19392 523584 1.45％ 2035 33 25 218 20928 523200 1.38％ 1655 34 22 248 23808 523776 1.49％ 2225 35 20 272 26112 522240 1.19％ 705 36 19 286 27456 521664 1.08％ 135 37 18 302 28992 521856 1.12％ 325 38 17 320 30720 522240 1.19％ 705 39 16 340 32640 522240 1.19％ 705

[0339] In some specific applications, the bit width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, the number of symbols N in the superframe is F It should be an integer multiple of 192 and 128. Consider the number of symbols N in the superframe F It should be an integer multiple of 192 and 128. Combining Table 37, we can get Table 38. The frame redundancy OH of the cases listed in Table 38 is less than 1.50%, and the number of symbols N in the superframe isF is an integer multiple of 192 and 128. In addition, Table 38 gives the number of symbols N in each subframe. S No limitation.

[0340] Table 38

[0341] Serial number <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW +N RES ]]> 1 544 10 960 522240 1.19％ 705 2 453 12 1152 521856 1.12％ 325 3 340 16 1536 522240 1.19％ 705 4 302 18 1728 521856 1.12％ 325 5 272 20 1920 522240 1.19％ 705 6 227 24 2304 523008 1.34％ 1465 7 170 32 3072 522240 1.19％ 705 8 160 34 3264 522240 1.19％ 705 9 151 36 3456 521856 1.12％ 325 10 136 40 3840 522240 1.19％ 705 11 124 44 4224 523776 1.49％ 2225 12 94 58 5568 523392 1.41％ 1845 13 88 62 5952 523776 1.49％ 2225 14 85 64 6144 522240 1.19％ 705 15 80 68 6528 522240 1.19％ 705 16 68 80 7680 522240 1.19％ 705 17 62 88 8448 523776 1.49％ 2225 18 58 94 9024 523392 1.41％ 1845 19 47 116 11136 523392 1.41％ 1845 20 44 124 11904 523776 1.49％ 2225 21 40 136 13056 522240 1.19％ 705 22 34 160 15360 522240 1.19％ 705 23 32 170 16320 522240 1.19％ 705 24 31 176 16896 523776 1.49％ 2225 25 29 188 18048 523392 1.41％ 1845 26 22 248 23808 523776 1.49％ 2225 27 20 272 26112 522240 1.19％ 705 28 18 302 28992 521856 1.12％ 325 29 17 320 30720 522240 1.19％ 705 30 16 340 32640 522240 1.19％ 705

[0342] In some specific applications, the bit width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, it is better to use not only the number of symbols N of the superframe F It should be an integer multiple of 192 and 128, and the number of symbols in each subframe is N. S It should also be an integer multiple of 192 and 128. It should be understood that if N S is an integer multiple of 192 and 128, then N F It must be an integer multiple of 192 and 128, but not necessarily the opposite. Consider the number of symbols N in each subframe S is an integer multiple of 192 and 128, combined with Table 38, Table 39 can be obtained. Then the frame redundancy OH of the case listed in Table 39 is less than 1.50%, and the number of symbols N in the superframe is F and the number of symbols in each subframe N S Both are integer multiples of 192 and 128.

[0343] Table 39

[0344]

[0345]

[0346] (15) Number of symbols before framing N CW =688128, for example, an open code (Open FEC, OFEC) encoding method with a coding redundancy of about 15.3% is used, and other encoding methods can also be used; each consecutive N PG = The first symbol among the 96 symbols is the pilot symbol. At this time, the number of subframes is N SF , the number of pilot symbols in each subframe N PS , the number of symbols in each subframe N S , the number of symbols in the superframe N F , superframe redundancy OH, the number of frame synchronization symbols N FAW and the number of reserved symbols N RES The sum of the parameters is as shown in Table 40, where N FAW +N PS is an odd number, N FAW is an odd number, N PS is an even number, the corresponding N RES>0,OH=(N F -N CW ) / N CW .

[0347] The frame redundancy of the superframe structure of the case listed in Table 40 is lower than OH<1.50%. Table 40 shows the number of symbols N in each subframe. S and the number of symbols in the superframe N F There is no limitation.

[0348] Table 40

[0349]

[0350]

[0351] In some specific applications, the bit width of the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, the number of symbols N in the superframe is F It should be an integer multiple of 192 and 128. Consider the number of symbols N in the superframe F It should be an integer multiple of 192 and 128. Combining Table 40, we can get Table 41. The frame redundancy OH of the case listed in Table 41 is less than 1.50%, and the number of symbols N in the superframe is F is an integer multiple of 192 and 128. In addition, Table 41 gives the number of symbols N in each subframe. S No limitation.

[0352] Table 41

[0353]

[0354]

[0355] In some specific applications, the bit width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, it is better to use not only the number of symbols N of the superframe F It should be an integer multiple of 192 and 128, and the number of symbols in each subframe is N. S It should also be an integer multiple of 192 and 128. It should be understood that if N S is an integer multiple of 192 and 128, then N F It must be an integer multiple of 192 and 128, but not necessarily the opposite. Consider the number of symbols N in each subframe S is an integer multiple of 192 and 128, combined with Table 41, Table 42 can be obtained. The frame redundancy OH of the case listed in Table 42 is less than 1.50%, and the number of symbols N in the superframe is F and the number of symbols in each subframe N S Both are integer multiples of 192 and 128.

[0356] Table 42

[0357]

[0358]

[0359] (16) Number of symbols before framing N CW = 150528, for example, an open code (Open FEC, OFEC) encoding method with a coding redundancy of about 17.9% is used, and other encoding methods can also be used; each consecutive N PG = The first symbol among the 96 symbols is the pilot symbol. At this time, the number of subframes is N SF , the number of pilot symbols in each subframe N PS , the number of symbols in each subframe N S , the number of symbols in the superframe N F , superframe redundancy OH, the number of frame synchronization symbols N FAW and the number of reserved symbols N RES The sum of the parameters is as shown in Table 43, where N FAW +N PS is an odd number, N FAW is an odd number, N PS is an even number, the corresponding N RES >0,OH=(N F -N CW ) / N CW .

[0360] The frame redundancy of the superframe structure of the case listed in Table 43 is lower than OH<1.50%. Table 43 shows the number of symbols N in each subframe. S and the number of symbols in the superframe N F In some specific applications, the bit width of the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, the number of symbols N in the superframe is F It should be an integer multiple of 192 and 128. Preferably, not only the number of symbols N in the superframe F It should be an integer multiple of 192 and 128, and the number of symbols in each subframe is N. S It should also be an integer multiple of 192 and 128. It should be understood that if N S is an integer multiple of 192 and 128, then N F It must be an integer multiple of 192 and 128, but not necessarily the other way around. It should be noted that the number of symbols N in the superframe for the cases listed in Table 43 is F and the number of symbols in each subframe N S are integer multiples of 192 and 128; in this case (16) there is no superframe symbol number N Fand the number of symbols in each subframe N S is an integer multiple of 192 and 128; there is no superframe symbol number N F The number of symbols in each subframe is N, which is an integer multiple of 192 and 128. S The number is not an integer multiple of 192 or 128.

[0361] Table 43

[0362] Serial number <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW +N RES ]]> 1 159 10 960 152640 1.40％ 523 2 61 26 2496 152256 1.15％ 143 3 53 30 2880 152640 1.40％ 523 4 15 106 10176 152640 1.40％ 523 5 13 122 11712 152256 1.15％ 143 6 5 318 30528 152640 1.40％ 523

[0363] (17) Number of symbols before framing N CW = 129024, for example, an open code (Open FEC, OFEC) encoding method with a coding redundancy of about 21.5% is used, and other encoding methods can also be used; each consecutive N PG = The first symbol among the 96 symbols is the pilot symbol. At this time, the number of subframes is N SF , the number of pilot symbols in each subframe N PS , the number of symbols in each subframe N S , the number of symbols in the superframe N F , superframe redundancy OH, the number of frame synchronization symbols N FAW and the number of reserved symbols N RES The sum of the parameters is as shown in Table 44, where N FAW +N PS is an odd number, N FAW is an odd number, N PS is an even number, the corresponding N RES >0,OH=(N F -N CW ) / N CW .

[0364] The frame redundancy of the superframe structure of the case listed in Table 44 is lower than OH<1.50%. Table 44 shows the number of symbols N in each subframe. S and the number of symbols in the superframe N F In some specific applications, the bit width of the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, the number of symbols N in the superframe is F Should be an integer multiple of 192 and 128. It should be noted that the number of symbols N in each subframe for all cases listed in this table is F are integer multiples of 192 and 128; in this case (17) there is no superframe symbol number N F The number is not an integer multiple of 192 or 128.

[0365] Table 44

[0366]

[0367]

[0368] In some specific applications, the bit width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, it is better to use not only the number of symbols N of the superframe F It should be an integer multiple of 192 and 128, and the number of symbols in each subframe is N. S It should also be an integer multiple of 192 and 128. It should be understood that if N S is an integer multiple of 192 and 128, then N F It must be an integer multiple of 192 and 128, but not necessarily the opposite. Consider the number of symbols N in each subframe S is an integer multiple of 192 and 128, combined with Table 44, we can get Table 45. Then the frame redundancy OH of the case listed in Table 45 is less than 1.50%, and the number of symbols N in the superframe is F and the number of symbols in each subframe N S Both are integer multiples of 192 and 128.

[0369] Table 45

[0370] Serial number <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW +N RES ]]> 1 85 16 1536 130560 1.19％ 177 2 68 20 1920 130560 1.19％ 177 3 34 40 3840 130560 1.19％ 177 4 31 44 4224 130944 1.49％ 557 5 20 68 6528 130560 1.19％ 177 6 17 80 7680 130560 1.19％ 177 7 11 124 11904 130944 1.49％ 557 8 10 136 13056 130560 1.19％ 177 9 5 272 26112 130560 1.19％ 177 10 4 340 32640 130560 1.19％ 177

[0371] (18) Number of symbols before framing N CW = 107520, for example, an open code (Open FEC, OFEC) encoding method with a coding redundancy of about 27.0% is used, and other encoding methods can also be used; each consecutive N PG = The first symbol among the 96 symbols is the pilot symbol. At this time, the number of subframes is N SF , the number of pilot symbols in each subframe N PS , the number of symbols in each subframe N S , the number of symbols in the superframe N F , superframe redundancy OH, the number of frame synchronization symbols N FAW and the number of reserved symbols N RES The sum of the parameters is as shown in Table 46, where N FAW +N PS is an odd number, N FAW is an odd number, N PS is an even number, the corresponding N RES >0,OH=(N F -N CW ) / N CW .

[0372] The frame redundancy of the superframe structure of the case listed in Table 46 is lower than OH<1.50%. Table 46 shows the number of symbols N in each subframe. S and the number of symbols in the superframe N F There is no limitation.

[0373] Table 46

[0374]

[0375]

[0376] In some specific applications, the bit width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, the number of symbols N in the superframe is F It should be an integer multiple of 192 and 128. Consider the number of symbols N in the superframe F It should be an integer multiple of 192 and 128. Combining Table 46, we can get Table 47. The frame redundancy OH of the case listed in Table 47 is less than 1.50%, and the number of symbols N in the superframe is F is an integer multiple of 192 and 128. In addition, Table 47 gives the number of symbols N in each subframe. S No limitation.

[0377] Table 47

[0378] Serial number <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW +N RES ]]> 1 71 16 1536 109056 1.43％ 401 2 8 142 13632 109056 1.43％ 401 3 4 284 27264 109056 1.43％ 401

[0379] In some specific applications, the bit width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, it is better to use not only the number of symbols N of the superframe F It should be an integer multiple of 192 and 128, and the number of symbols in each subframe is N. S It should also be an integer multiple of 192 and 128. It should be understood that if N S is an integer multiple of 192 and 128, then N F It must be an integer multiple of 192 and 128, but not necessarily the opposite. Consider the number of symbols N in each subframe S is an integer multiple of 192 and 128, combined with Table 47, Table 48 can be obtained. Then the frame redundancy OH of the case listed in Table 48 is less than 1.50%, and the number of symbols N in the superframe F and the number of symbols in each subframe N S Both are integer multiples of 192 and 128.

[0380] Table 48

[0381] Serial number <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW +N RES ]]> 1 71 16 1536 109056 1.43％ 401 2 4 284 27264 109056 1.43％ 401

[0382] (19) Number of symbols before framing N CW=175616, for example, using a CFEC encoding method with a coding redundancy of about 15.3%, or other encoding methods; each consecutive N PG = The first symbol among the 96 symbols is the pilot symbol. At this time, the number of subframes is N SF , the number of pilot symbols in each subframe N PS , the number of symbols in each subframe N S , the number of symbols in the superframe N F , superframe redundancy OH, the number of frame synchronization symbols N FAW and the number of reserved symbols N RES The sum of the parameters is as shown in Table 49, where N FAW +N PS is an odd number, N FAW is an odd number, N PS is an even number, the corresponding N RES >0,OH=(N F -N CW ) / N CW .

[0383] The frame redundancy of the superframe structure of the case listed in Table 49 is lower than OH<1.50%. Table 49 shows the number of symbols N in each subframe. S and the number of symbols in the superframe N F There is no limitation.

[0384] Table 49

[0385]

[0386] In some specific applications, the bit width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, the number of symbols N in the superframe is F It should be an integer multiple of 192 and 128. Consider the number of symbols N in the superframe F It should be an integer multiple of 192 and 128. Combining Table 49, we can get Table 50. The frame redundancy OH of the case listed in Table 50 is less than 1.50%, and the number of symbols N in the superframe is F is an integer multiple of 192 and 128. In addition, Table 50 gives the number of symbols N in each subframe. S No limitation.

[0387] Table 50

[0388] Serial number <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW +N RES ]]> 1 116 16 1536 178176 1.46％ 705 2 58 32 3072 178176 1.46％ 705 3 32 58 5568 178176 1.46％ 705 4 29 64 6144 178176 1.46％ 705 5 16 116 11136 178176 1.46％ 705 6 8 232 22272 178176 1.46％ 705

[0389] In some specific applications, the bit width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, it is better to use not only the number of symbols N of the superframe FIt should be an integer multiple of 192 and 128, and the number of symbols in each subframe is N. S It should also be an integer multiple of 192 and 128. It should be understood that if N S is an integer multiple of 192 and 128, then N F It must be an integer multiple of 192 and 128, but not necessarily the opposite. Consider the number of symbols N in each subframe S is an integer multiple of 192 and 128, combined with Table 50, Table 51 can be obtained. Then the frame redundancy OH of the case listed in Table 51 is less than 1.50%, and the number of symbols N of the superframe F and the number of symbols in each subframe N S Both are integer multiples of 192 and 128.

[0390] Table 51

[0391] Serial number <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW +N RES ]]> 1 116 16 1536 178176 1.46％ 705 2 58 32 3072 178176 1.46％ 705 3 29 64 6144 178176 1.46％ 705 4 16 116 11136 178176 1.46％ 705 5 8 232 22272 178176 1.46％ 705

[0392] (20) Number of symbols before framing N CW =351232, for example, an open code (Open FEC, OFEC) encoding method with a coding redundancy of about 15.3% is used, and other encoding methods can also be used; each consecutive N PG = The first symbol among the 96 symbols is the pilot symbol. At this time, the number of subframes is N SF , the number of pilot symbols in each subframe N PS , the number of symbols in each subframe N S , the number of symbols in the superframe N F , superframe redundancy OH, the number of frame synchronization symbols N FAW and the number of reserved symbols N RES The sum of the parameters is as shown in Table 52, where N FAW +N PS is an odd number, N FAW is an odd number, N PS is an even number, the corresponding N RES >0,OH=(N F -N CW ) / N CW .

[0393] The frame redundancy of the superframe structure of the case listed in Table 52 is lower than OH<1.50%. Table 52 shows the number of symbols N in each subframe. S and the number of symbols in the superframe N F There is no limitation.

[0394] Table 52

[0395]

[0396]

[0397] In some specific applications, the bit width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, the number of symbols N in the superframe is F It should be an integer multiple of 192 and 128. Consider the number of symbols N in the superframe F It should be an integer multiple of 192 and 128. Combining Table 52, we can get Table 53. Then the frame redundancy OH of the case listed in Table 53 is less than 1.50%, and the number of symbols N in the superframe is F is an integer multiple of 192 and 128. In addition, Table 53 shows the number of symbols N in each subframe. S No limitation.

[0398] Table 53

[0399] Serial number <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW +N RES ]]> 1 370 10 960 355200 1.13％ 269 2 309 12 1152 355968 1.35％ 1029 3 232 16 1536 356352 1.46％ 1409 4 206 18 1728 355968 1.35％ 1029 5 185 20 1920 355200 1.13％ 269 6 116 32 3072 356352 1.46％ 1409 7 103 36 3456 355968 1.35％ 1029 8 74 50 4800 355200 1.13％ 269 9 64 58 5568 356352 1.46％ 1409 10 58 64 6144 356352 1.46％ 1409 11 50 74 7104 355200 1.13％ 269 12 37 100 9600 355200 1.13％ 269 13 32 116 11136 356352 1.46％ 1409 14 29 128 12288 356352 1.46％ 1409 15 25 148 14208 355200 1.13％ 269 16 18 206 19776 355968 1.35％ 1029 17 16 232 22272 356352 1.46％ 1409 18 10 370 35520 355200 1.13％ 269

[0400] In some specific applications, the bit width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, it is better to use not only the number of symbols N of the superframe F It should be an integer multiple of 192 and 128, and the number of symbols in each subframe is N. S It should also be an integer multiple of 192 and 128. It should be understood that if N S is an integer multiple of 192 and 128, then N F It must be an integer multiple of 192 and 128, but not necessarily the opposite. Consider the number of symbols N in each subframe S is an integer multiple of 192 and 128, combined with Table 53, Table 54 can be obtained. Then the frame redundancy OH of the case listed in Table 54 is less than 1.50%, and the number of symbols N in the superframe F and the number of symbols in each subframe N S Both are integer multiples of 192 and 128.

[0401] Table 54

[0402] Serial number <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW +N RES ]]> 1 309 12 1152 355968 1.35％ 1029 2 232 16 1536 356352 1.46％ 1409 3 185 20 1920 355200 1.13％ 269 4 116 32 3072 356352 1.46％ 1409 5 103 36 3456 355968 1.35％ 1029 6 58 64 6144 356352 1.46％ 1409 7 37 100 9600 355200 1.13％ 269 8 32 116 11136 356352 1.46％ 1409 9 29 128 12288 356352 1.46％ 1409 10 25 148 14208 355200 1.13％ 269 11 16 232 22272 356352 1.46％ 1409

[0403] (21) Number of symbols before framing N CW =526848, for example, an open code (Open FEC, OFEC) encoding method with a coding redundancy of about 15.3% is used, and other encoding methods can also be used; each consecutive N PG = The first symbol among the 96 symbols is the pilot symbol. At this time, the number of subframes is N SF , the number of pilot symbols in each subframe N PS , the number of symbols in each subframe N S , the number of symbols in the superframe N F, superframe redundancy OH, the number of frame synchronization symbols N FAW and the number of reserved symbols N RES The sum of the parameters is as shown in Table 55, where N FAW +N PS is an odd number, N FAW is an odd number, N PS is an even number, the corresponding N RES >0,OH=(N F -N CW ) / N CW .

[0404] The frame redundancy of the superframe structure of the case listed in Table 55 is lower than OH<1.50%. Table 55 shows the number of symbols N in each subframe. S and the number of symbols in the superframe N F There is no limitation.

[0405] Table 55

[0406]

[0407]

[0408] In some specific applications, the bit width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, the number of symbols N in the superframe is F It should be an integer multiple of 192 and 128. Consider the number of symbols N in the superframe F It should be an integer multiple of 192 and 128. Combining Table 55, we can get Table 56. The frame redundancy OH of the case listed in Table 56 is less than 1.50%, and the number of symbols N in the superframe is F is an integer multiple of 192 and 128. In addition, Table 56 gives the number of symbols N in each subframe. S No limitation.

[0409] Table 56

[0410]

[0411]

[0412] In some specific applications, the bit width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, it is better to use not only the number of symbols N of the superframe F It should be an integer multiple of 192 and 128, and the number of symbols in each subframe is N. S It should also be an integer multiple of 192 and 128. It should be understood that if N S is an integer multiple of 192 and 128, then N FIt must be an integer multiple of 192 and 128, but not necessarily the opposite. Consider the number of symbols N in each subframe S is an integer multiple of 192 and 128, combined with Table 56, Table 57 can be obtained. Then the frame redundancy OH of the case listed in Table 57 is less than 1.50%, and the number of symbols N of the superframe F and the number of symbols in each subframe N S Both are integer multiples of 192 and 128.

[0413] Table 57

[0414] Serial number <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW +N RES ]]> 1 463 12 1152 533376 1.24％ 973 2 347 16 1536 532992 1.17％ 593 3 278 20 1920 533760 1.31％ 1353 4 232 24 2304 534528 1.46％ 2113 5 174 32 3072 534528 1.46％ 2113 6 139 40 3840 533760 1.31％ 1353 7 116 48 4608 534528 1.46％ 2113 8 107 52 4992 534144 1.38％ 1733 9 87 64 6144 534528 1.46％ 2113 10 73 76 7296 532608 1.09％ 213 11 58 96 9216 534528 1.46％ 2113 12 48 116 11136 534528 1.46％ 2113 13 29 192 18432 534528 1.46％ 2113 14 24 232 22272 534528 1.46％ 2113 15 19 292 28032 532608 1.09％ 213 16 16 348 33408 534528 1.46％ 2113

[0415] (22) Number of symbols before framing N CW =702464, for example, an open code (Open FEC, OFEC) encoding method with a coding redundancy of about 15.3% is used, and other encoding methods can also be used; each consecutive N PG = The first symbol among the 96 symbols is the pilot symbol. At this time, the number of subframes is N SF , the number of pilot symbols in each subframe N PS , the number of symbols in each subframe N S , the number of symbols in the superframe N F , superframe redundancy OH, the number of frame synchronization symbols N FAW and the number of reserved symbols N RES The sum of the parameters is as shown in Table 58, where N FAW +N PS is an odd number, N FAW is an odd number, N PS is an even number, the corresponding N RES >0,OH=(N F -N CW ) / N CW .

[0416] The frame redundancy of the superframe structure of the case listed in Table 58 is lower than OH<1.50%. Table 58 shows the number of symbols N in each subframe. S and the number of symbols in the superframe N F There is no limitation.

[0417] Table 58

[0418]

[0419]

[0420] In some specific applications, the bit width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, the number of symbols N in the superframe is FIt should be an integer multiple of 192 and 128. Consider the number of symbols N in the superframe F It should be an integer multiple of 192 and 128. Combining Table 58, we can get Table 59. The frame redundancy OH of the case listed in Table 59 is less than 1.50%, and the number of symbols N in the superframe is F is an integer multiple of 192 and 128. In addition, Table 59 gives the number of symbols N in each subframe. S No limitation.

[0421] Table 59

[0422] Serial number <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW +N RES ]]> 1 740 10 960 710400 1.13％ 537 2 617 12 1152 710784 1.18％ 917 3 463 16 1536 711168 1.24％ 1297 4 370 20 1920 710400 1.13％ 537 5 309 24 2304 711936 1.35％ 2057 6 265 28 2688 712320 1.40％ 2437 7 232 32 3072 712704 1.46％ 2817 8 218 34 3264 711552 1.29％ 1677 9 206 36 3456 711936 1.35％ 2057 10 185 40 3840 710400 1.13％ 537 11 148 50 4800 710400 1.13％ 537 12 128 58 5568 712704 1.46％ 2817 13 116 64 6144 712704 1.46％ 2817 14 109 68 6528 711552 1.29％ 1677 15 106 70 6720 712320 1.40％ 2437 16 103 72 6912 711936 1.35％ 2057 17 100 74 7104 710400 1.13％ 537 18 86 86 8256 710016 1.08％ 157 19 74 100 9600 710400 1.13％ 537 20 70 106 10176 712320 1.40％ 2437 21 64 116 11136 712704 1.46％ 2817 22 58 128 12288 712704 1.46％ 2817 23 53 140 13440 712320 1.40％ 2437 24 50 148 14208 710400 1.13％ 537 25 43 172 16512 710016 1.08％ 157 26 37 200 19200 710400 1.13％ 537 27 36 206 19776 711936 1.35％ 2057 28 35 212 20352 712320 1.40％ 2437 29 34 218 20928 711552 1.29％ 1677 30 32 232 22272 712704 1.46％ 2817 31 29 256 24576 712704 1.46％ 2817 32 25 296 28416 710400 1.13％ 537 33 20 370 35520 710400 1.13％ 537

[0423] In some specific applications, the bit width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, it is better to use not only the number of symbols N of the superframe F It should be an integer multiple of 192 and 128, and the number of symbols in each subframe is N. S It should also be an integer multiple of 192 and 128. It should be understood that if N S is an integer multiple of 192 and 128, then N F It must be an integer multiple of 192 and 128, but not necessarily the opposite. Consider the number of symbols N in each subframe S is an integer multiple of 192 and 128, combined with Table 59, Table 60 can be obtained. The frame redundancy OH of the case listed in Table 60 is less than 1.50%, and the number of symbols N in the superframe is F and the number of symbols in each subframe N S Both are integer multiples of 192 and 128.

[0424] Table 60

[0425] Serial number <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW +N RES ]]> 1 617 12 1152 710784 1.18％ 917 2 463 16 1536 711168 1.24％ 1297 3 370 20 1920 710400 1.13％ 537 4 309 24 2304 711936 1.35％ 2057 5 265 28 2688 712320 1.40％ 2437 6 232 32 3072 712704 1.46％ 2817 7 206 36 3456 711936 1.35％ 2057 8 185 40 3840 710400 1.13％ 537 9 116 64 6144 712704 1.46％ 2817 10 109 68 6528 711552 1.29％ 1677 11 103 72 6912 711936 1.35％ 2057 12 74 100 9600 710400 1.13％ 537 13 64 116 11136 712704 1.46％ 2817 14 58 128 12288 712704 1.46％ 2817 15 53 140 13440 712320 1.40％ 2437 16 50 148 14208 710400 1.13％ 537 17 43 172 16512 710016 1.08％ 157 18 37 200 19200 710400 1.13％ 537 19 35 212 20352 712320 1.40％ 2437 20 32 232 22272 712704 1.46％ 2817 21 29 256 24576 712704 1.46％ 2817 22 25 296 28416 710400 1.13％ 537

[0426] It should be noted that in some specific applications, the number of frame synchronization symbols N FAW = 23. Several specific frame synchronization symbol sequences are given below.

[0427]

[0428]

[0429]

[0430] This application also provides several specific embodiments, which are described as follows:

[0431] Embodiment 1: A specific form of a frame synchronization symbol sequence.

[0432] Number of frame synchronization symbols N FAW=23, where, in one polarization direction, the 2nd to 23rd frame synchronization symbols (a total of 22 frame synchronization symbols) are: 3-3j, 3+3j, 3+3j, 3+3j, 3-3j, 3-3j, -3-3j, 3+3j, -3-3j, -3+3j, -3+3j, 3-3j, -3-3j, -3-3j, -3+3j, 3-3j, -3-3j, -3+3j, 3+3j, -3-3j, 3-3j, -3+3j, 3+3j, -3-3j, 3-3j, -3+3j, 3+3j, -3-3j, 3-3j, -3+3j, 3+3j, -3-3j, -3+ 3j; in another polarization direction, the 2nd to 23rd frame synchronization symbols (a total of 22 frame synchronization symbols) are: 3+3j, -3+3j, -3-3j, -3+3j, 3-3j, 3+3j, 3-3j, 3-3j, -3-3j, 3-3j, 3+3j, -3+3j, -3+3j, 3+3j, -3-3j, 3+3j, -3-3j, 3+3j, -3-3j, -3+3j, 3-3j, -3+3j, 3-3j, -3+3j, 3-3j, -3+3j, 3-3j, -3+3j, 3-3j, -3+3j, 3-3j, -3+3j.

[0433] The first symbol of the first type of subframe is both a frame synchronization symbol and a pilot symbol, that is, the first symbol of the subframe is located at the first symbol of the frame synchronization symbol sequence and also at the first symbol of the pilot symbol sequence. Then, the first symbol of the frame synchronization symbol sequence is also the first symbol in the pilot symbol sequence, that is, the first symbol of the frame synchronization symbol sequence has the same value as the first symbol in the pilot symbol sequence. It should be understood that the value of the first symbol of the frame synchronization symbol sequence (i.e., the first symbol of the pilot symbol sequence) has the following 16 cases: -3-3j in one polarization direction and -3-3j in another polarization direction; or -3+3j in one polarization direction and -3-3j in another polarization direction; or 3-3j in one polarization direction and -3-3j in another polarization direction; or 3+3j in one polarization direction and -3-3j in another polarization direction; or -3-3j in one polarization direction and -3+3j in another polarization direction; or -3+3j in one polarization direction and -3+3j in another polarization direction; or 3-3j in one polarization direction and -3+3j in another polarization direction; or 3-3j in one polarization direction and -3+3j in another polarization direction; or 3+3j in one polarization direction and -3+3j in the other polarization direction; or -3-3j in one polarization direction and 3-3j in the other polarization direction; or -3+3j in one polarization direction and 3-3j in the other polarization direction; or 3-3j in one polarization direction and 3-3j in the other polarization direction; or 3+3j in one polarization direction and 3-3j in the other polarization direction; or -3-3j in one polarization direction and 3+3j in the other polarization direction; or -3+3j in one polarization direction and 3+3j in the other polarization direction; or 3-3j in one polarization direction and 3+3j in the other polarization direction; or 3+3j in one polarization direction and 3+3j in the other polarization direction; or 3+3j in one polarization direction and 3+3j in the other polarization direction.

[0434] For example, when the first symbol of the frame synchronization symbol sequence (that is, the first symbol of the pilot symbol sequence) is -3+3j in one polarization direction and 3+3j in the other polarization direction, the frame synchronization symbol sequence in one polarization direction is -3+3j, 3-3j, 3+3j, 3+3j, 3+3j, 3-3j, 3-3j, -3-3j, 3+3j, -3-3j, -3+3j, -3+3j, 3-3j, -3-3j, -3+3j, -3+3j, 3-3j, -3-3j, -3+3j, 3+3j, -3 In this case, the sequence of the real part of the complex number corresponding to the frame synchronization symbol sequence in one polarization direction (such as polarization direction X) is 3+3j, 3+3j, -3+3j, -3-3j, -3+3j, 3-3j, 3+3j, 3-3j, 3-3j, -3-3j, 3+3j, 3-3j, -3-3j, 3+3j, -3+3j, 3+3j, -3+3j, 3+3j, -3-3j, 3+3j, -3-3j, 3+3j, -3-3j, 3+3j, -3-3j, 3+3j, -3+3j, 3-3j, -3+3j, 3-3j, -3+3j. At this time, the sequence of the real part of the complex number corresponding to the frame synchronization symbol sequence in one polarization direction (such as polarization direction X) is denoted as X I , the corresponding sequence of the imaginary parts of the complex numbers is recorded as X Q The sequence of the real part of the complex number corresponding to the frame synchronization symbol sequence in another polarization direction (such as polarization direction Y) is recorded as Y I , the corresponding sequence of the imaginary parts of the complex numbers is recorded as Y Q ; then X I , X Q , Y I , Y Q The length of these four sequences is 23.

[0435] Fig.10 It is a schematic diagram of the effects of cross-correlation and autocorrelation in the embodiment of the present application. Fig.10 The horizontal axis in represents the offset (the unit is the offset position bit), and the vertical axis represents the normalized amplitude. Fig.10 (a) shows X I and Y I , X Q and Y Q , X I and X Q , Y I and Y Q The cross-correlation result has a normalized sidelobe value of no more than 0.39. Fig.10 (b) shows X I , X Q , Y I , Y QThe autocorrelation result of the frame synchronization symbol sequence (i.e., the first symbol of the pilot symbol sequence) has an absolute value of no more than 0.39. It should be understood that when the first symbol of the frame synchronization symbol sequence (i.e., the first symbol of the pilot symbol sequence) takes other values ​​in the two polarization directions, its X I , X Q , Y I , Y Q The autocorrelation normalized magnitude and X I and Y I , X Q and Y Q , X I and X Q , Y I and Y Q The normalized amplitude of the cross-correlation sidelobe value may be greater than 0.4.

[0436] Embodiment 2: A specific superframe format.

[0437] The pre-framing symbol is obtained by OFEC encoding with a code redundancy of about 15.3%. The number of pre-framing symbols is 172032, and each consecutive N PG = The fixed position symbol among the 128 symbols is the pilot symbol, and its corresponding N SF 、N PS 、N FAW 、N RES 、N S 、N F , OH and other parameters are shown in Table 61 below:

[0438] Table 61

[0439] <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW ]]> <![CDATA[N RES ]]> 113 12 1536 173568 0.89％ 23 158

[0440] Fig.11 Schematic diagram of the first implementation of superframe and subframe in the embodiment of the present application. The superframe includes 113 subframes, each subframe includes 1536 symbols, such as Fig.11 The structure of the first type of subframe is as shown in (a). Fig.11 As shown in (b) of FIG. 1 , there are 12 pilot symbols, 23 frame synchronization symbols, and 158 reserved symbols. The structure of the second type of subframe is as follows: Fig.11 As shown in (c), there are also 12 pilot symbols. In each subframe, the first symbol in every 128 symbols is a pilot symbol. In some specific applications, the bit width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, the number of symbols N in the superframe is F is an integer multiple of 192 and 128. Preferably, the number of symbols in each subframe is N S It is also an integer multiple of 192 and 128.

[0441] Embodiment 3: A specific superframe format

[0442] The pre-framing symbol is obtained by OFEC encoding with a code redundancy of about 15.3%. The number of pre-framing symbols is 344064, and each consecutive N PG = The fixed position symbol among the 128 symbols is the pilot symbol, and its corresponding N SF 、N PS 、N FAW 、N RES 、N S 、N F , OH and other parameters are shown in Table 62 below:

[0443] Table 62

[0444] <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW ]]> <![CDATA[N RES ]]> 113 24 3072 347136 0.89％ 23 338

[0445] Fig.12 Schematic diagram of the second implementation of superframe and subframe in the embodiment of the present application. The superframe includes 113 subframes, each subframe includes 3072 symbols, such as Fig.12 The structure of the first type of subframe is as shown in (a). Fig.12 As shown in (b) of FIG. 1 , there are 24 pilot symbols, 23 frame synchronization symbols, and 338 reserved symbols. The structure of the second type of subframe is as follows: Fig.12 As shown in (c), there are also 24 pilot symbols. In each subframe, the first symbol in every 128 symbols is a pilot symbol; in some specific applications, the bit width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, the number of symbols N in the superframe is F is an integer multiple of 192 and 128. Preferably, the number of symbols N in each subframe in the superframe S It is also an integer multiple of 192 and 128.

[0446] Embodiment 4: A specific superframe format

[0447] The pre-framing symbol is obtained by OFEC encoding with a code redundancy of about 15.3%. The number of pre-framing symbols is 516096, and each consecutive N PG = The fixed position symbol among the 128 symbols is the pilot symbol, and its corresponding N SF 、N PS 、N FAW 、N RES 、N S 、N F , OH and other parameters are shown in Table 63 below:

[0448] Table 63

[0449]

[0450]

[0451] Fig.13 FIG. 1 is a schematic diagram of a third implementation of a superframe and a subframe in an embodiment of the present application. The superframe includes 113 subframes, each of which includes 4608 symbols. Fig.13 The structure of the first type of subframe is as shown in (a). Fig.13 As shown in (b) of FIG. 1 , there are 36 pilot symbols, 23 frame synchronization symbols, and 518 reserved symbols. The structure of the second type of subframe is as follows: Fig.13 As shown in (c), there are also 36 pilot symbols. In each subframe, the first symbol in every 128 symbols is a pilot symbol; in some specific applications, the bit width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, the number of symbols N in the superframe is F is an integer multiple of 192 and 128. Preferably, the number of symbols N in each subframe in the superframe S It is also an integer multiple of 192 and 128.

[0452] Embodiment 5: A specific superframe format.

[0453] The pre-framing symbol is obtained by OFEC encoding with a code redundancy of about 15.3%. The number of pre-framing symbols is 688128, and each consecutive N PG = The fixed position symbol among the 128 symbols is the pilot symbol, and its corresponding N SF 、N PS 、N FAW 、N RES 、N S 、N F , OH and other parameters are shown in Table 64 below:

[0454] Table 64

[0455] <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW ]]> <![CDATA[N RES ]]> 113 48 6144 694272 0.89％ 23 698

[0456] Fig.14 FIG. 4 is a schematic diagram of a fourth implementation of a superframe and a subframe in an embodiment of the present application. The superframe includes 113 subframes, each of which includes 6144 symbols. Fig.14 The structure of the first type of subframe is as shown in (a). Fig.14 As shown in (b) of FIG. 1 , there are 48 pilot symbols, 23 frame synchronization symbols, and 698 reserved symbols. The structure of the second type of subframe is as follows: Fig.14As shown in (c), there are also 48 pilot symbols. In each subframe, the first symbol in every 128 symbols is a pilot symbol; in some specific applications, the bit width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, the number of symbols N in the superframe is F is an integer multiple of 192 and 128. Preferably, the number of symbols N in each subframe in the superframe S It is also an integer multiple of 192 and 128.

[0457] Embodiment 6: A specific superframe format.

[0458] The pre-framing symbol is obtained by OFEC encoding with a code redundancy of about 17.9%. The number of pre-framing symbols is 150528, and each consecutive N PG = The fixed position symbol among the 128 symbols is the pilot symbol, and its corresponding N SF 、N PS 、N FAW 、N RES 、N S 、N F , OH and other parameters are shown in Table 65 below:

[0459] Table 65

[0460] <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW ]]> <![CDATA[N RES ]]> 22 54 6912 152064 1.02％ 23 326

[0461] Fig.15 FIG. 5 is a schematic diagram of a fifth implementation of a superframe and a subframe in an embodiment of the present application. The superframe includes 22 subframes, each of which includes 6912 symbols. Fig.15 The structure of the first type of subframe is as shown in (a). Fig.15 As shown in (b) of FIG. 1 , there are 54 pilot symbols, 23 frame synchronization symbols, and 326 reserved symbols. The structure of the second type of subframe is as follows: Fig.15 As shown in (c), there are also 54 pilot symbols. In each subframe, the first symbol in every 128 symbols is a pilot symbol; in some specific applications, the bit width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, the number of symbols N in the superframe is F is an integer multiple of 192 and 128. Preferably, the number of symbols N in each subframe in the superframe S It is also an integer multiple of 192 and 128.

[0462] Embodiment 7: A specific superframe format.

[0463] The pre-framing symbol is obtained by CFEC encoding with a code redundancy of about 15.3%. The number of pre-framing symbols is 175616, and each consecutive N PG= The fixed position symbol among the 128 symbols is the pilot symbol, and its corresponding N SF 、N PS 、N FAW 、N RES 、N S 、N F , OH and other parameters are shown in Table 66 below:

[0464] Table 66

[0465] <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW ]]> <![CDATA[N RES ]]> 21 66 8448 177408 1.02％ 23 384

[0466] Fig.16 FIG. 6 is a schematic diagram of a sixth implementation of a superframe and a subframe in an embodiment of the present application. The superframe includes 21 subframes, each of which includes 8848 symbols. Fig.16 The structure of the first type of subframe is as shown in (a). Fig.16 As shown in (b) of FIG. 1 , there are 66 pilot symbols, 23 frame synchronization symbols, and 384 reserved symbols. The structure of the second type of subframe is as follows: Fig.16 As shown in (c), there are also 66 pilot symbols. In each subframe, the first symbol in every 128 symbols is a pilot symbol; in some specific applications, the bit width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, the number of symbols N in the superframe is F is an integer multiple of 192 and 128. Preferably, the number of symbols N in each subframe in the superframe S It is also an integer multiple of 192 and 128.

[0467] Embodiment 8: A specific superframe format.

[0468] The pre-framing symbol is obtained by CFEC encoding with a code redundancy of about 15.3%. The number of pre-framing symbols is 526848. The symbol at a fixed position in each continuous NPG=128 symbols is a pilot symbol, and its corresponding N SF 、N PS 、N FAW 、N RES 、N S 、N F , OH and other parameters are shown in Table 67 below:

[0469] Table 67

[0470] <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW ]]> <![CDATA[N RES ]]> 173 24 3072 531456 0.87％ 23 434

[0471] Fig.17 FIG. 7 is a schematic diagram of a seventh implementation of a superframe and a subframe in an embodiment of the present application. The superframe includes 173 subframes, each of which includes 3072 symbols. Fig.17 The structure of the first type of subframe is as shown in (a). Fig.17 As shown in (b) of FIG. 1 , there are 24 pilot symbols, 23 frame synchronization symbols, and 434 reserved symbols. The structure of the second type of subframe is as follows: Fig.17 As shown in (b), there are also 24 pilot symbols. In each subframe, the first symbol in every 128 symbols is a pilot symbol; in some specific applications, the bit width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, the number of symbols N in the superframe is F is an integer multiple of 192 and 128. Preferably, the number of symbols N in each subframe in the superframe S It is also an integer multiple of 192 and 128.

[0472] Embodiment 9: A specific superframe format.

[0473] The pre-framing symbol is obtained by CFEC encoding with a code redundancy of about 15.3%. The number of pre-framing symbols is 702464. The symbol at a fixed position in each continuous NPG=128 symbols is a pilot symbol, and its corresponding N SF 、N PS 、N FAW 、N RES 、N S 、N F , OH and other parameters are shown in Table 68 below:

[0474] Table 68

[0475] <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW ]]> <![CDATA[N RES ]]> 71 78 9984 708864 0.91％ 23 840

[0476] Fig.18 FIG. 8 is a schematic diagram of an eighth implementation of a superframe and a subframe in an embodiment of the present application. The superframe includes 71 subframes, each of which includes 9984 symbols. Fig.18 The structure of the first type of subframe is as shown in (a). Fig.18 As shown in (b) of FIG. 1 , there are 78 pilot symbols, 23 frame synchronization symbols, and 840 reserved symbols. The structure of the second type of subframe is as follows: Fig.18 As shown in (c), there are also 78 pilot symbols. In each subframe, the first symbol in every 128 symbols is a pilot symbol; in some specific applications, the bit width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, the number of symbols N in the superframe is F is an integer multiple of 192 and 128. Preferably, the number of symbols N in each subframe in the superframe S It is also an integer multiple of 192 and 128.

[0477] Embodiment 10: A specific superframe format.

[0478] The pre-framing symbols are obtained by OFEC encoding with a code redundancy of about 15.3%. The number of pre-framing symbols is 688128. The symbol at a fixed position in each continuous NPG=96 symbols is a pilot symbol, and its corresponding N SF 、N PS 、N FAW 、N RES 、N S 、N F , OH and other parameters are shown in Table 69 below:

[0479] Table 69

[0480] <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW ]]> <![CDATA[N RES ]]> 151 48 4608 695808 1.12％ 23 410

[0481] Fig.19 FIG. 9 is a schematic diagram of a ninth implementation of a superframe and a subframe in an embodiment of the present application. The superframe includes 151 subframes, each of which includes 4608 symbols. Fig.19 The structure of the first type of subframe is as shown in (a). Fig.19 As shown in (b) of FIG. 1 , there are 48 pilot symbols, 23 frame synchronization symbols, and 410 reserved symbols. The structure of the second type of subframe is as follows: Fig.19 As shown in (c), there are also 48 pilot symbols. In each subframe, the first symbol in every 96 symbols is a pilot symbol; in some specific applications, the bit width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, the number of symbols N in the superframe is F is an integer multiple of 192 and 128. Preferably, the number of symbols N in each subframe in the superframe S It is also an integer multiple of 192 and 128.

[0482] Embodiment 11: A specific superframe format.

[0483] The pre-framing symbol is obtained by OFEC encoding with a code redundancy of about 21.5%. The number of pre-framing symbols is 129024. The symbol at a fixed position in each continuous NPG=96 symbols is a pilot symbol, and its corresponding N SF 、N PS 、N FAW 、N RES 、N S 、N F , OH and other parameters are shown in Table 70 below:

[0484] Table 70

[0485] <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW ]]> <![CDATA[N RES ]]> 20 68 6528 130560 1.19％ 23 154

[0486] Fig. 20FIG. 1 is a schematic diagram of the tenth implementation of a superframe and a subframe in an embodiment of the present application. The superframe includes 20 subframes, each subframe includes 6528 symbols, such as Fig. 20 The structure of the first type of subframe is as shown in (a). Fig. 20 As shown in (b) of FIG. 1 , there are 68 pilot symbols, 23 frame synchronization symbols, and 154 reserved symbols. The structure of the second type of subframe is as follows: Fig. 20 As shown in (c), there are also 68 pilot symbols. In each subframe, the first symbol in every 96 symbols is a pilot symbol; in some specific applications, the bit width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, the number of symbols N in the superframe is F is an integer multiple of 192 and 128. Preferably, the number of symbols N in each subframe in the superframe S It is also an integer multiple of 192 and 128.

[0487] Embodiment 12: A specific superframe format.

[0488] The pre-framing symbol is obtained by OFEC encoding with a code redundancy of about 21.5%. The number of pre-framing symbols is 129024. The symbol at a fixed position in each continuous NPG=96 symbols is a pilot symbol, and its corresponding N SF 、N PS 、N FAW 、N RES 、N S 、N F , OH and other parameters are shown in Table 71 below:

[0489] Table 71

[0490] <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW ]]> <![CDATA[N RES ]]> 17 80 7680 130560 1.19％ 23 154

[0491] Fig.21 FIG. 1 is a schematic diagram of the eleventh implementation of a superframe and a subframe in an embodiment of the present application. The superframe includes 17 subframes, each of which includes 7680 symbols. Fig.21 The structure of the first type of subframe is as shown in (a). Fig.21 As shown in (b) of FIG. 1 , there are 80 pilot symbols, 23 frame synchronization symbols, and 154 reserved symbols. The structure of the second type of subframe is as follows: Fig.21 As shown in (c), there are also 80 pilot symbols. In each subframe, the first symbol in every 96 symbols is a pilot symbol; in some specific applications, the bit width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, the number of symbols N in the superframe is F is an integer multiple of 192 and 128. Preferably, the number of symbols N in each subframe in the superframe S It is also an integer multiple of 192 and 128.

[0492] Embodiment 13: A specific superframe format.

[0493] The pre-framing symbol is obtained by CFEC encoding with a code redundancy of about 15.3%. The number of pre-framing symbols is 351232. The symbol at a fixed position in each continuous NPG=96 symbols is a pilot symbol, and its corresponding N SF 、N PS 、N FAW 、N RES 、N S 、N F , OH and other parameters are shown in Table 72 below:

[0494] Table 72

[0495] <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW ]]> <![CDATA[N RES ]]> 37 100 9600 355200 1.13％ 23 246

[0496] Fig. 22 FIG. 12 is a schematic diagram of a twelfth implementation of a superframe and a subframe in an embodiment of the present application. The superframe includes 37 subframes, each of which includes 9600 symbols. Fig. 22 The structure of the first type of subframe is as shown in (a). Fig. 22 As shown in (b) of FIG. 1 , there are 100 pilot symbols, 23 frame synchronization symbols, and 246 reserved symbols. The structure of the second type of subframe is as follows: Fig. 22 As shown in (c), there are also 100 pilot symbols. In each subframe, the first symbol in every 96 symbols is a pilot symbol; in some specific applications, the bit width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, the number of symbols N in the superframe is F is an integer multiple of 192 and 128. Preferably, the number of symbols N in each subframe in the superframe S It is also an integer multiple of 192 and 128.

[0497] Embodiment 14: A specific superframe format.

[0498] The pre-framing symbol is obtained by CFEC encoding with a code redundancy of about 15.3%. The number of pre-framing symbols is 526848. The symbol at a fixed position in each continuous NPG=96 symbols is a pilot symbol, and its corresponding N SF 、N PS 、N FAW 、N RES 、N S 、N F , OH and other parameters are shown in Table 73 below:

[0499] Table 73

[0500] <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW ]]> <![CDATA[N RES ]]> 73 76 7296 532608 1.09％ 23 190

[0501] Fig.23 FIG. 13 is a schematic diagram of the thirteenth implementation of the superframe and subframe in the embodiment of the present application. The superframe includes 73 subframes, each subframe includes 7296 symbols, such as Fig.23 The structure of the first type of subframe is as shown in (a). Fig.23 As shown in (b) of FIG. 1 , there are 76 pilot symbols, 23 frame synchronization symbols, and 190 reserved symbols. The structure of the second type of subframe is as follows: Fig.23 As shown in (c), there are also 76 pilot symbols. In each subframe, the first symbol in every 96 symbols is a pilot symbol; in some specific applications, the bit width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, the number of symbols N in the superframe is F is an integer multiple of 192 and 128. Preferably, the number of symbols N in each subframe in the superframe S It is also an integer multiple of 192 and 128.

[0502] Embodiment 15: A specific superframe format.

[0503] The pre-framing symbol is obtained by CFEC encoding with a code redundancy of about 15.3%. The number of pre-framing symbols is 702464. The symbol at a fixed position in each continuous NPG=96 symbols is a pilot symbol, and its corresponding N SF 、N PS 、N FAW 、N RES 、N S 、N F , OH and other parameters are shown in Table 74 below:

[0504] Table 74

[0505] <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW ]]> <![CDATA[N RES ]]> 43 172 16512 710016 1.08％ 23 134

[0506] Fig.24 FIG. 14 is a schematic diagram of the fourteenth implementation of the superframe and subframe in the embodiment of the present application. The superframe includes 43 subframes, each subframe includes 16512 symbols, such as Fig.24 The structure of the first type of subframe is as shown in (a). Fig.24 As shown in (b) of FIG. 1 , there are 172 pilot symbols, 23 frame synchronization symbols, and 134 reserved symbols. The structure of the second type of subframe is as follows: Fig.24 As shown in (c), there are also 172 pilot symbols. In each subframe, the first symbol in every 96 symbols is a pilot symbol; in some specific applications, the bit width in the specific DSP implementation of the transceiver is 192 or 128. In order to facilitate hardware implementation, the number of symbols N in the superframe is Fis an integer multiple of 192 and 128. Preferably, the number of symbols N in each subframe in the superframe S It is also an integer multiple of 192 and 128.

[0507] Fig.25 FIG. 1 is a schematic diagram of the structure of a data transmission device applied to a transmitting end in an embodiment of the present application. Fig.25 As shown, the data transmission device includes: a processing unit 201 and a sending unit 202. The processing unit 201 is used to perform the operation of the above step 101, and the sending unit 202 is used to perform the operation of the above step 102. It should be understood that the data transmission device provided in the embodiment of the present application can also be implemented in other ways. For example, the unit division in the above device is only a logical function division, and there may be other division methods in actual implementation, for example, multiple units or components can be combined or integrated into another system. In addition, each functional unit in each embodiment of the present application can be integrated in a processing unit, or it can be each independent physical unit, or it can be two or more functional units integrated in a processing unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units.

[0508] Fig.26 FIG. 1 is a schematic diagram of the structure of a data transmission device applied to a receiving end in an embodiment of the present application. Fig.26 As shown, the data transmission device includes: a receiving unit 301 and a processing unit 302. The receiving unit 301 is used to perform the operation of the above step 102, and the processing unit 302 is used to perform the operation of the above step 103. It should be understood that the data transmission device provided in the embodiment of the present application can also be implemented in other ways. For example, the unit division in the above device is only a logical function division, and there may be other division methods in actual implementation, for example, multiple units or components can be combined or integrated into another system. In addition, each functional unit in each embodiment of the present application can be integrated in a processing unit, or it can be each independent physical unit, or it can be two or more functional units integrated in a processing unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units.

[0509] Fig. 27 FIG. 2 is another structural diagram of a data transmission device in an embodiment of the present application. The data transmission device can be applied to a transmitting end or a receiving end. Fig. 27 As shown, the data transmission device includes a processor 401 and a transceiver 402. The processor 401 and the transceiver 402 are connected to each other through a line. Specifically, the transceiver 402 is used to perform data transmission and reception operations, and the processor 401 is used to perform other operations except data transmission and reception. In a possible implementation, the processor 401 may include the above Fig.25 The processing unit 201 and the transceiver 402 shown include the above Fig.25 In another possible implementation, the processor 401 may include the above Fig.26 The processing unit 301 and the transceiver 402 shown include the above Fig.26 The receiving unit 301 is shown. Optionally, the data transmission device may further include a memory 403, wherein the memory 403 is used to store program instructions and data.

[0510] The embodiment of the present application also provides a chip. The chip integrates a circuit and one or more interfaces for implementing the functions of the above-mentioned processor 401. When the chip integrates a memory, the chip can complete the method steps of any one or more embodiments in the above-mentioned embodiments. When the chip does not integrate a memory, it can be connected to an external memory through an interface. The chip implements the actions performed by the sending end device or the receiving end device in the above-mentioned embodiment according to the program code stored in the external memory.

[0511] Finally, it should be noted that the above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A transmission method for optical communication, characterized in that: include: Obtain a superframe comprising a plurality of subframes, wherein the subframes comprise pilot symbols, wherein in one polarization direction, the number N of the pilot symbols in the subframes PS is an even number greater than 0, each of the pilot symbols is one of the four complex numbers -A-Aj, -A+Aj, A-Aj and A+Aj, A is a real number, and each consecutive N in the subframe PG The symbols include a pilot symbol located at a fixed position, the superframe includes a first type of subframe, and the first type of subframe also includes N FAW frame synchronization symbols, each frame synchronization symbol is one of four complex numbers including -A-Aj, -A+Aj, A-Aj and A+Aj, one symbol in the first type of subframe is both a pilot symbol and a frame synchronization symbol, and the N FAW is an odd number; The superframe is transmitted.

2. The method according to claim 1, characterized in that The N PG is 96 or 128.

3. The method according to claim 1 or 2, characterized in that: In one subframe, a pilot symbol sequence including a plurality of pilot symbols in a first polarization direction is different from a pilot symbol sequence including a plurality of pilot symbols in a second polarization direction, and the first polarization direction and the second polarization direction are orthogonal to each other.

4. The method according to any one of claims 1 to 3, characterized in that In one subframe, the sum of the real parts of all pilot symbols in one polarization direction is 0, and the sum of the imaginary parts of all pilot symbols in one polarization direction is 0; In the first type of subframe, N FAW The sum of the real parts of the frame synchronization symbols except for the symbols that are both pilot symbols and frame synchronization symbols is 0. FAW The sum of the imaginary parts of the frame synchronization symbols is 0 except for the symbols that are both pilot symbols and frame synchronization symbols.

5. The method according to any one of claims 1 to 4, characterized in that In a subframe, the number of pilot symbols having values ​​of -A-Aj, -A+Aj, A-Aj and A+Aj in a polarization direction differs from each other by less than or equal to 2.

6. The method according to any one of claims 1 to 5, characterized in that In a subframe, the number of pilot symbols -A-Aj in two polarization directions, the number of pilot symbols -A+Aj in two polarization directions, the number of pilot symbols A-Aj in two polarization directions, and the number of pilot symbols A+Aj in two polarization directions are the same, and the two polarization directions are orthogonal to each other.

7. The method according to any one of claims 1 to 6, characterized in that N FAW The consecutive frame synchronization symbols are arranged starting from the start position of the first type of subframe.

8. The method according to claim 7, characterized in that N FAW The symbol located at the starting position among the consecutive frame synchronization symbols is both a pilot symbol and a frame synchronization symbol.

9. The method according to any one of claims 1 to 8, characterized in that The first type of subframe also includes a reserved symbol and a pre-framing symbol. In the first type of subframe, the frame synchronization symbol is located before the reserved symbol, and the reserved symbol is located before the pre-framing symbol.

10. The method according to any one of claims 1 to 9, characterized in that The superframe includes at least one second-type subframe, and the second-type subframe also includes a pre-framing symbol.

11. The method according to any one of claims 1 to 10, characterized in that The number of pre-framing symbols in the superframe is N CW , the number of all symbols in the superframe is N F , N PG 、N CW and N F The corresponding relationship between them is one of the following items: N PG =128, N CW =172032,N F =173440 or 173568 or 173696 or 173824 or 173952 or 174080; N PG =128, N CW =344064,N F =346880 or 347136 or 347392 or 347520 or 347648 or 347776 or 347904 or 348160; N PG =128, N CW =516096,N F =520192 or 520320 or 520448 or 520576 or 520704 or 520832 or 520960 or 521088 or 521472 or 521600 or 521856 or 522240; N PG =128, N CW =688128,N F =693760 or 693888 or 694144 or 694272 or 694400 or 694656 or 694784 or 694912 or 695040 or 695296 or 695552 or 695808 or 696192 or 696320; N PG =128, N CW =150528,N F =152064 or 152192 or 152320; N PG =128, N CW =129024,N F =130176 or 130560; N PG =128, N CW =107520,N F =108416 or 108544 or 108672 or 108800; N PG =128, N CW =175616,N F =177152 or 177280 or 177408 or 177536 or 177664; N PG =128, N CW =351232,N F =354304 or 354432 or 354560 or 354688 or 354816 or 354944 or 355072 or 355200 or 355328; N PG =128, N CW =526848,N F =531200 or 531456 or 531712 or 531840 or 532224 or 532480 or 532608 or 532864 or 532992 or 533120; N PG =128, N CW =702464,N F =708096 or 708224 or 708480 or 708608 or 708736 or 708864 or 708992 or 709120 or 709376 or 709504 or 709632 or 709888 or 710016 or 710144 or 710272 or 710400 or 710528 or 710656; N PG =96, N CW =172032,N F =173952 or 174048 or 174240 or 174336 or 174432 or 174528; N PG =96, N CW =344064,N F =347904 or 348000 or 348096 or 348192 or 348384 or 348480 or 348672 or 348768 or 348864 or 349056; N PG =96, N CW =516096,N F =521664 or 521856 or 522144 or 522240 or 522720 or 522816 or 523008 or 523200 or 523296 or 523393 or 523488 or 523584 or 523776; N PG =96, N CW =688128,N F =695520 or 695808 or 695904 or 696000 or 696192 or 696384 or 696672 or 696768 or 696864 or 696960 or 697056 or 697248 or 697344 or 697536 or 697632 or 697728 or 698112 or 698400; N PG =96, N CW =150528,N F =152160 or 152256 or 152352 or 152448 or 152544 or 152640 or 152736; N PG =96, N CW =129024,N F =130464 or 130560 or 130752 or 130848 or 130944; N PG =96, N CW =107520,N F =108768 or 108864 or 108960 or 109056; N PG =96, N CW =175616,N F =177504 or 177600 or 177888 or 177984 or 178080 or 178176; N PG =96, N CW =351232,N F =355008 or 355104 or 355200 or 355488 or 355680 or 355776 or 355872 or 355968 or 356160 or 356352 or 356448; N PG =96, N CW =526848,N F =532416 or 532512 or 532608 or 532704 or 532800 or 532896 or 532992 or 533280 or 533376 or 533568 or 533664 or 533760 or 533856 or 533952 or 534144 or 534240 or 534336 or 534432 or 534528; N PG =96, N CW =702464,N F =709920 or 710016 or 710112 or 710208 or 710304 or 710400 or 710688 or 710784 or 710976 or 711168 or 711264 or 711360 or 711552 or 711648 or 711744 or 711936 or 712320 or 712416 or 712704 or 712800 or 712896.

12. The method according to any one of claims 1 to 11, characterized in that In one polarization direction, the modulation format of the symbols in the superframe is quadrature phase shift keying QPSK, A=-1 or 1; Alternatively, in one polarization direction, the modulation format of the symbols in the superframe is 16QAM, A=-1, 1, -3, 3, -√5 or √5; Alternatively, in one polarization direction, the modulation format of the symbols in the superframe is 64QAM, A=-1, 1, -3, 3, -√21, √21, -5, 5, -7 or 7.

13. A transmission method for optical communication, characterized in that: include: A superframe comprising a plurality of subframes is received, wherein the subframes include pilot symbols, wherein in one polarization direction, the number N of the pilot symbols in the subframes is PS is an even number greater than 0, each of the pilot symbols is one of the four complex numbers -A-Aj, -A+Aj, A-Aj and A+Aj, A is a real number, and each consecutive N in the subframe PG The symbols include a pilot symbol located at a fixed position, the superframe includes a first type of subframe, and the first type of subframe also includes N FAW frame synchronization symbols, each frame synchronization symbol is one of four complex numbers including -A-Aj, -A+Aj, A-Aj and A+Aj, one symbol in the first type of subframe is both a pilot symbol and a frame synchronization symbol, and the N FAW is an odd number; The superframe is decoded.

14. The method according to claim 13, characterized in that The N PG is 96 or 128.

15. The method according to claim 13 or 14, characterized in that N FAW The consecutive frame synchronization symbols are arranged starting from the start position of the first type of subframe.

16. The method according to claim 15, characterized in that N FAW The symbol located at the starting position among the consecutive frame synchronization symbols is both a pilot symbol and a frame synchronization symbol.

17. A chip, characterized in that: The chip includes a processor and a memory, wherein the memory and the processor are connected to each other via a line, instructions are stored in the memory, and the processor is used to execute the method according to any one of claims 1 to 16.

18. A data transmission device applied to a transmitting end, characterized in that: include: A processing unit and a sending unit; The processing unit is used to: obtain a superframe including a plurality of subframes, wherein the subframe includes a pilot symbol, wherein in one polarization direction, the number N of the pilot symbols in the subframe PS is an even number greater than 0, each of the pilot symbols is one of the four complex numbers -A-Aj, -A+Aj, A-Aj and A+Aj, A is a real number, and each consecutive N in the subframe PG The symbols include a pilot symbol located at a fixed position, the superframe includes a first type of subframe, and the first type of subframe also includes N FAW frame synchronization symbols, each frame synchronization symbol is one of four complex numbers including -A-Aj, -A+Aj, A-Aj and A+Aj, one symbol in the first type of subframe is both a pilot symbol and a frame synchronization symbol, and the N FAW is an odd number; The sending unit is used to send the superframe.

19. The data transmission device according to claim 18, characterized in that: The N PG is 96 or 128.

20. The data transmission device according to claim 18 or 19, characterized in that: In one subframe, a pilot symbol sequence including a plurality of pilot symbols in a first polarization direction is different from a pilot symbol sequence including a plurality of pilot symbols in a second polarization direction, and the first polarization direction and the second polarization direction are orthogonal to each other.

21. The data transmission device according to any one of claims 18 to 20, characterized in that: In one subframe, the sum of the real parts of all pilot symbols in one polarization direction is 0, and the sum of the imaginary parts of all pilot symbols in one polarization direction is 0; In the first type of subframe, N FAW The sum of the real parts of the frame synchronization symbols except for the symbols that are both pilot symbols and frame synchronization symbols is 0. FAW The sum of the imaginary parts of the frame synchronization symbols is 0 except for the symbols that are both pilot symbols and frame synchronization symbols.

22. The data transmission device according to any one of claims 18 to 21, characterized in that: In a subframe, the number of pilot symbols having values ​​of -A-Aj, -A+Aj, A-Aj and A+Aj in a polarization direction differs from each other by less than or equal to 2.

23. The data transmission device according to any one of claims 18 to 22, characterized in that: In a subframe, the number of pilot symbols -A-Aj in two polarization directions, the number of pilot symbols -A+Aj in two polarization directions, the number of pilot symbols A-Aj in two polarization directions, and the number of pilot symbols A+Aj in two polarization directions are the same, and the two polarization directions are orthogonal to each other.

24. The data transmission device according to any one of claims 18 to 23, characterized in that: N FAW The consecutive frame synchronization symbols are arranged starting from the start position of the first type of subframe.

25. The data transmission device according to claim 24, characterized in that: N FAW The symbol located at the starting position among the consecutive frame synchronization symbols is both a pilot symbol and a frame synchronization symbol.

26. The data transmission device according to any one of claims 18 to 25, characterized in that: The first type of subframe also includes a reserved symbol and a pre-framing symbol. In the first type of subframe, the frame synchronization symbol is located before the reserved symbol, and the reserved symbol is located before the pre-framing symbol.

27. The data transmission device according to any one of claims 18 to 26, characterized in that: The superframe includes at least one second-type subframe, and the second-type subframe also includes a pre-framing symbol.

28. The data transmission device according to any one of claims 18 to 27, characterized in that: The number of pre-framing symbols in the superframe is N CW , the number of all symbols in the superframe is N F , N PG 、N CW and N F The corresponding relationship between them is one of the following items: N PG =128, N CW =172032,N F =173440 or 173568 or 173696 or 173824 or 173952 or 174080; N PG =128, N CW =344064,N F =346880 or 347136 or 347392 or 347520 or 347648 or 347776 or 347904 or 348160; N PG =128, N CW =516096,N F =520192 or 520320 or 520448 or 520576 or 520704 or 520832 or 520960 or 521088 or 521472 or 521600 or 521856 or 522240; N PG =128, N CW =688128,N F =693760 or 693888 or 694144 or 694272 or 694400 or 694656 or 694784 or 694912 or 695040 or 695296 or 695552 or 695808 or 696192 or 696320; N PG =128, N CW =150528,N F =152064 or 152192 or 152320; N PG =128, N CW =129024,N F =130176 or 130560; N PG =128, N CW =107520,N F =108416 or 108544 or 108672 or 108800; N PG =128, N CW =175616,N F =177152 or 177280 or 177408 or 177536 or 177664; N PG =128, N CW =351232,N F =354304 or 354432 or 354560 or 354688 or 354816 or 354944 or 355072 or 355200 or 355328; N PG =128, N CW =526848,N F =531200 or 531456 or 531712 or 531840 or 532224 or 532480 or 532608 or 532864 or 532992 or 533120; N PG =128, N CW =702464,N F =708096 or 708224 or 708480 or 708608 or 708736 or 708864 or 708992 or 709120 or 709376 or 709504 or 709632 or 709888 or 710016 or 710144 or 710272 or 710400 or 710528 or 710656; N PG =96, N CW =172032,N F =173952 or 174048 or 174240 or 174336 or 174432 or 174528; N PG =96, N CW =344064,N F =347904 or 348000 or 348096 or 348192 or 348384 or 348480 or 348672 or 348768 or 348864 or 349056; N PG =96, N CW =516096,N F =521664 or 521856 or 522144 or 522240 or 522720 or 522816 or 523008 or 523200 or 523296 or 523393 or 523488 or 523584 or 523776; N PG =96, N CW =688128,N F =695520 or 695808 or 695904 or 696000 or 696192 or 696384 or 696672 or 696768 or 696864 or 696960 or 697056 or 697248 or 697344 or 697536 or 697632 or 697728 or 698112 or 698400; N PG =96, N CW =150528,N F =152160 or 152256 or 152352 or 152448 or 152544 or 152640 or 152736; N PG =96, N CW =129024,N F =130464 or 130560 or 130752 or 130848 or 130944; N PG =96, N CW =107520,N F =108768 or 108864 or 108960 or 109056; N PG =96, N CW =175616,N F =177504 or 177600 or 177888 or 177984 or 178080 or 178176; N PG =96, N CW =351232,N F =355008 or 355104 or 355200 or 355488 or 355680 or 355776 or 355872 or 355968 or 356160 or 356352 or 356448; N PG =96, N CW =526848,N F =532416 or 532512 or 532608 or 532704 or 532800 or 532896 or 532992 or 533280 or 533376 or 533568 or 533664 or 533760 or 533856 or 533952 or 534144 or 534240 or 534336 or 534432 or 534528; N PG =96, N CW =702464,N F =709920 or 710016 or 710112 or 710208 or 710304 or 710400 or 710688 or 710784 or 710976 or 711168 or 711264 or 711360 or 711552 or 711648 or 711744 or 711936 or 712320 or 712416 or 712704 or 712800 or 712896.

29. The data transmission device according to any one of claims 18 to 28, characterized in that: In one polarization direction, the modulation format of the symbols in the superframe is quadrature phase shift keying QPSK, A=-1 or 1; Alternatively, in one polarization direction, the modulation format of the symbols in the superframe is 16QAM, A=-1, 1, -3, 3, -√5 or √5; Alternatively, in one polarization direction, the modulation format of the symbols in the superframe is 64QAM, A=-1, 1, -3, 3, -√21, √21, -5, 5, -7 or 7.

30. A data transmission device applied to a receiving end, characterized in that: include: a receiving unit and a processing unit; The receiving unit is used to: receive a superframe including a plurality of subframes, wherein the subframe includes a pilot symbol, wherein in one polarization direction, the number N of the pilot symbols in the subframe PS is an even number greater than 0, each of the pilot symbols is one of the four complex numbers -A-Aj, -A+Aj, A-Aj and A+Aj, A is a real number, and each consecutive N in the subframe PG The symbols include a pilot symbol located at a fixed position, the superframe includes a first type of subframe, and the first type of subframe also includes N FAW frame synchronization symbols, each frame synchronization symbol is one of four complex numbers including -A-Aj, -A+Aj, A-Aj and A+Aj, one symbol in the first type of subframe is both a pilot symbol and a frame synchronization symbol, and the N FAW is an odd number; The processing unit is used for decoding the super frame.

31. The data transmission device according to claim 30, characterized in that: The N PG is 96 or 128.

32. The data transmission device according to claim 30 or 31, characterized in that: N FAW The consecutive frame synchronization symbols are arranged starting from the start position of the first type of subframe.

33. The data transmission device according to claim 32, characterized in that: N FAW The symbol located at the starting position among the consecutive frame synchronization symbols is both a pilot symbol and a frame synchronization symbol.

34. A data transmission system, characterized in that: include: The data transmission device according to any one of claims 18 to 29 and the data transmission device according to any one of claims 30 to 33.

Images