Data 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, and solves the problem that a transmission symbol sequence in the prior art cannot be suitable for scenes above 800Gbps. 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 sub-frame 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, A is a real number, every continuous NPG symbols in the sub-frame comprise a pilot symbol located at a fixed position, NPG is 96 or 128, the superframe comprises a first type of sub-frame, and the sub-frame comprises a second type of sub-frame. The first type of subframes further comprise NFAW frame synchronization symbols, each frame synchronization symbol is one of four complex numbers including-AFAW-AFAWj,-AFAW + AFAWj, AFAW-AFAWj and AFAW + AFAWj, the AFAW is a real number, and the NFAW is an even number. And further, the transmitting end transmits the superframe. It can be seen that the interval of inserting the pilot symbols in the sub-frame is larger, and redundancy is reduced.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of optical communications, and in particular, to a data 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 data 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. A is a real number. Each consecutive N in a subframe PG symbols include a pilot symbol located at a fixed position, N PG is 96 or 128, the superframe includes a first-type subframe, and the first-type subframe also includes N FAW frame synchronization symbols, each frame synchronization symbol is -A FAW -A FAW j, -A FAW +A FAW j. A FAW -A FAW j and A FAW +A FAW j is one of the four plural forms, A FAW is a real number, N FAWis an even 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 acquisition of the superframe by the module 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 sending of the superframe by the module 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, every 96 or 128 consecutive symbols in the subframe include a pilot symbol. It can be seen that the interval for inserting the pilot symbol in the subframe is larger, which reduces redundancy.

[0006] 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.

[0007] 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 is 0. FAW The sum of the imaginary parts of the frame synchronization symbols is 0, so that DC balance can be achieved, which is beneficial for the receiving end to restore the signal quality.

[0008] 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.

[0009] 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.

[0010] In some possible implementations, the starting position of the first type of subframe is a pilot symbol, so that the arrangement of the pilot symbols is more conducive to standardization.

[0011] In some possible implementations, NFAW The continuous frame synchronization symbols are arranged starting from the last bit of the pilot symbol in the first type of subframe, so that the structure of the subframe is more neat.

[0012] 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.

[0013] In some possible implementations, the superframe includes at least one second-type subframe, and the second-type subframe also includes a pre-framing symbol.

[0014] 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:

[0015] N PG =128,N CW =172032,N F =173440 or 173568 or 173696 or 173824 or 173952 or 174080;

[0016] N PG =128, N CW =344064,N F =346880 or 347136 or 347392 or 347520 or 347648 or 347776 or 347904 or 348160;

[0017] 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;

[0018] 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;

[0019] N PG =128,N CW =150528,N F =152064 or 152192 or 152320;

[0020] N PG =128,N CW =129024,N F =130176 or 130560;

[0021] N PG =128,N CW =107520,N F =108416 or 108544 or 108672 or 108800;

[0022] N PG =128,N CW =175616,N F =177152 or 177280 or 177408 or 177536 or 177664;

[0023] 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;

[0024] 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;

[0025] 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;

[0026] N PG =96, N CW =172032,N F=173952 or 174048 or 174240 or 174336 or 174432 or 174528;

[0027] 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;

[0028] 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;

[0029] 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;

[0030] N PG =96, N CW =150528,N F =152160 or 152256 or 152352 or 152448 or 152544 or 152640 or 152736;

[0031] N PG =96, N CW =129024,N F =130464 or 130560 or 130752 or 130848 or 130944;

[0032] N PG =96, N CW =107520,N F =108768 or 108864 or 108960 or 109056;

[0033] N PG =96, N CW =175616,NF =177504 or 177600 or 177888 or 177984 or 178080 or 178176;

[0034] 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;

[0035] 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;

[0036] 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.

[0037] 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.

[0038] In a second aspect, an embodiment of the present application provides a data transmission method for optical communication, the method being applied to a receiving end. Specifically, the receiving end receives a superframe including a plurality of subframes, the subframe including 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 symbols include a pilot symbol located at a fixed position, N PG is 96 or 128. The superframe includes a first-type subframe, and the first-type subframe also includes N FAW frame synchronization symbols, each frame synchronization symbol is -A FAW -A FAW j, -A FAW +A FAW j. A FAW -A FAW j and A FAW +A FAW j is one of the four plural forms, A FAW is a real number, N FAW is an even number. Then, the receiving end decodes the superframe.

[0039] 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.

[0040] 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 is 0. FAW The sum of the imaginary parts of the frame synchronization symbols is 0, so that DC balance can be achieved, which is beneficial for the receiving end to restore the signal quality.

[0041] 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.

[0042] 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.

[0043] In some possible implementations, the starting position of the first type of subframe is a pilot symbol, so that the arrangement of the pilot symbols is more conducive to standardization.

[0044] In some possible implementations, N FAW The continuous frame synchronization symbols are arranged starting from the last bit of the pilot symbol in the first type of subframe, so that the structure of the subframe is more neat.

[0045] 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.

[0046] In some possible implementations, the superframe includes at least one second-type subframe, and the second-type subframe also includes a pre-framing symbol.

[0047] 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:

[0048] N PG =128,N CW =172032,N F =173440 or 173568 or 173696 or 173824 or 173952 or 174080;

[0049] N PG =128,N CW =344064,N F =346880 or 347136 or 347392 or 347520 or 347648 or 347776 or 347904 or 348160;

[0050] 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;

[0051] 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;

[0052] N PG =128, N CW =150528,N F =152064 or 152192 or 152320;

[0053] N PG =128, N CW =129024,N F =130176 or 130560;

[0054] N PG =128, N CW =107520,N F =108416 or 108544 or 108672 or 108800;

[0055] N PG =128, N CW =175616,N F =177152 or 177280 or 177408 or 177536 or 177664;

[0056] 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;

[0057] 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;

[0058] 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;

[0059] N PG =96, N CW =172032,N F =173952 or 174048 or 174240 or 174336 or 174432 or 174528;

[0060] 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;

[0061] 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;

[0062] 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;

[0063] N PG =96, N CW =150528,N F =152160 or 152256 or 152352 or 152448 or 152544 or 152640 or 152736;

[0064] N PG =96, N CW =129024,N F =130464 or 130560 or 130752 or 130848 or 130944;

[0065] N PG =96, N CW =107520,N F =108768 or 108864 or 108960 or 109056;

[0066] N PG =96, N CW =175616,N F =177504 or 177600 or 177888 or 177984 or 178080 or 178176;

[0067] 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;

[0068] 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;

[0069] 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.

[0070] 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.

[0071] 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.

[0072] 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 symbols include a pilot symbol located at a fixed position, N PG is 96 or 128. The superframe includes a first-type subframe, and the first-type subframe also includes N FAW frame synchronization symbols, each frame synchronization symbol is -A FAW -A FAW j, -A FAW +A FAW j. A FAW -A FAW j and A FAW +A FAW j is one of the four plural forms, A FAW is a real number, N FAW is an even number. The sending unit is used to send a superframe.

[0073] 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.

[0074] 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 is 0. FAW The sum of the imaginary parts of the frame synchronization symbols is 0, so that DC balance can be achieved, which is beneficial for the receiving end to restore the signal quality.

[0075] 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.

[0076] 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.

[0077] In some possible implementations, the starting position of the first type of subframe is a pilot symbol, so that the arrangement of the pilot symbols is more conducive to standardization.

[0078] In some possible implementations, N FAW The continuous frame synchronization symbols are arranged starting from the last bit of the pilot symbol in the first type of subframe, so that the structure of the subframe is more neat.

[0079] 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.

[0080] In some possible implementations, the superframe includes at least one second-type subframe, and the second-type subframe also includes a pre-framing symbol.

[0081] 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:

[0082] N PG =128,N CW =172032,N F =173440 or 173568 or 173696 or 173824 or 173952 or 174080;

[0083] N PG =128,N CW =344064,N F =346880 or 347136 or 347392 or 347520 or 347648 or 347776 or 347904 or 348160;

[0084] 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;

[0085] 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;

[0086] N PG =128,N CW =150528,N F =152064 or 152192 or 152320;

[0087] N PG =128,N CW =129024,N F =130176 or 130560;

[0088] N PG =128,N CW =107520,N F =108416 or 108544 or 108672 or 108800;

[0089] N PG =128,N CW =175616,N F=177152 or 177280 or 177408 or 177536 or 177664;

[0090] 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;

[0091] 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;

[0092] 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;

[0093] N PG =96, N CW =172032,N F =173952 or 174048 or 174240 or 174336 or 174432 or 174528;

[0094] 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;

[0095] 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;

[0096] 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;

[0097] N PG =96, N CW =150528,N F =152160 or 152256 or 152352 or 152448 or 152544 or 152640 or 152736;

[0098] N PG =96, N CW =129024,N F =130464 or 130560 or 130752 or 130848 or 130944;

[0099] N PG =96, N CW =107520,N F =108768 or 108864 or 108960 or 109056;

[0100] N PG =96, N CW =175616,N F =177504 or 177600 or 177888 or 177984 or 178080 or 178176;

[0101] 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;

[0102] 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;

[0103] 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.

[0104] 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.

[0105] 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. PG symbols include a pilot symbol located at a fixed position, N PG is 96 or 128. The superframe includes a first-type subframe, and the first-type subframe also includes N FAW frame synchronization symbols, each frame synchronization symbol is -A FAW -A FAW j, -A FAW +A FAW j. A FAW -A FAW j and A FAW +A FAWj is one of the four plural forms, A FAW is a real number, N FAW is an even number. The processing unit is used for: decoding the super frame.

[0106] 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.

[0107] 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 is 0. FAW The sum of the imaginary parts of the frame synchronization symbols is 0, so that DC balance can be achieved, which is beneficial for the receiving end to restore the signal quality.

[0108] 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.

[0109] 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.

[0110] In some possible implementations, the starting position of the first type of subframe is a pilot symbol, so that the arrangement of the pilot symbols is more conducive to standardization.

[0111] In some possible implementations, N FAW The continuous frame synchronization symbols are arranged starting from the last bit of the pilot symbol in the first type of subframe, so that the structure of the subframe is more neat.

[0112] 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.

[0113] In some possible implementations, the superframe includes at least one second-type subframe, and the second-type subframe also includes a pre-framing symbol.

[0114] 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:

[0115] N PG =128, N CW =172032,N F =173440 or 173568 or 173696 or 173824 or 173952 or 174080;

[0116] N PG =128, N CW =344064,N F =346880 or 347136 or 347392 or 347520 or 347648 or 347776 or 347904 or 348160;

[0117] 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;

[0118] 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;

[0119] N PG =128, N CW =150528,N F =152064 or 152192 or 152320;

[0120] N PG =128, N CW =129024,NF =130176 or 130560;

[0121] N PG =128,N CW =107520,N F =108416 or 108544 or 108672 or 108800;

[0122] N PG =128,N CW =175616,N F =177152 or 177280 or 177408 or 177536 or 177664;

[0123] 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;

[0124] 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;

[0125] 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;

[0126] N PG =96, N CW =172032,N F =173952 or 174048 or 174240 or 174336 or 174432 or 174528;

[0127] 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;

[0128] 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;

[0129] 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;

[0130] N PG =96, N CW =150528,N F =152160 or 152256 or 152352 or 152448 or 152544 or 152640 or 152736;

[0131] N PG =96, N CW =129024,N F =130464 or 130560 or 130752 or 130848 or 130944;

[0132] N PG =96, N CW =107520,N F =108768 or 108864 or 108960 or 109056;

[0133] N PG =96, N CW =175616,N F =177504 or 177600 or 177888 or 177984 or 178080 or 178176;

[0134] 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;

[0135] 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;

[0136] 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.

[0137] 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0138] Figure 1 A schematic diagram of a communication system used in an embodiment of the present application;

[0139] Figure 2 A schematic diagram of a framing process in an embodiment of the present application;

[0140] Figure 3 A schematic diagram of a data transmission method in an embodiment of the present application;

[0141] Figure 4 This is a schematic diagram of the structure of a superframe in an embodiment of the present application;

[0142] Figure 5 A schematic diagram of a structure of a subframe in an embodiment of the present application;

[0143] Figure 6 Another structural diagram of a subframe in an embodiment of the present application;

[0144] Figure 7 A schematic diagram of a constellation diagram in two polarization directions in an embodiment of the present application;

[0145] Figure 8 is another schematic diagram of a constellation diagram in two polarization directions in an embodiment of the present application;

[0146] Fig. 9 A schematic diagram of simulating symbol data flow in an embodiment of the present application;

[0147] Fig.10 This is a schematic diagram of the effects of cross-correlation and autocorrelation in an embodiment of the present application;

[0148] Fig.11 This is a schematic diagram of a first implementation of a superframe and a subframe in an embodiment of the present application;

[0149] Fig.12 This is a schematic diagram of a second implementation of a superframe and a subframe in an embodiment of the present application;

[0150] Fig.13 This is a schematic diagram of a third implementation of a superframe and a subframe in an embodiment of the present application;

[0151] Fig.14 This is a schematic diagram of a fourth implementation of a superframe and a subframe in an embodiment of the present application;

[0152] Fig.15 This is a schematic diagram of a fifth implementation of a superframe and a subframe in an embodiment of the present application;

[0153] Fig.16 Schematic diagram of a sixth implementation of a superframe and a subframe in an embodiment of the present application;

[0154] Fig.17 Schematic diagram of a seventh implementation of a superframe and a subframe in an embodiment of the present application;

[0155] Fig.18 This is a schematic diagram of an eighth implementation of a superframe and a subframe in an embodiment of the present application;

[0156] Fig.19 Schematic diagram of a ninth implementation of a superframe and a subframe in an embodiment of the present application;

[0157] Fig. 20 Schematic diagram of the tenth implementation of a superframe and a subframe in the embodiment of the present application;

[0158] 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;

[0159] 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;

[0160] 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;

[0161] 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;

[0162] 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;

[0163] Fig.26 Schematic diagram of the structure of a data transmission device applied to a receiving end in an embodiment of the present application;

[0164] Fig. 27 Another structural schematic diagram of the data transmission device in an embodiment of the present application. DETAILED DESCRIPTION

[0165] The embodiments of the present application provide a data transmission method and related devices for optical communication. Every 96 or 128 consecutive symbols in a subframe include a pilot symbol. It can be seen that the interval for inserting pilot symbols in the subframe is larger, which reduces redundancy.

[0166] 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 data transmission method 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.

[0167] 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.

[0168] 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, and N is an integer greater than 1.

[0169] Typically, the received data sequence is the information and check sequence obtained through the forward error correction code (FEC). Figure 2 The 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.

[0170] Figure 3 Schematic diagram of a data transmission method in an embodiment of the present application. Figure 3 As shown, the data transmission method includes the following steps.

[0171] 101. Acquire a superframe including multiple subframes.

[0172] 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.

[0173] 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.

[0174] 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, the number of frame synchronization symbols in the first type of subframe is recorded as N FAW , N FAW is an even number. Usually, the starting position of the first type of subframe is a pilot symbol, N FAW A frame synchronization symbol is arranged adjacent to the pilot symbol.

[0175] 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 at each consecutive N PG Any position in the symbol, no limitation is made here.

[0176] It should be noted that the frame synchronization symbol is used for synchronization between superframes, that is, N consecutive symbols starting from the second 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 N FAW frame synchronization symbols are arranged next to the pilot symbol, or N FAWA frame synchronization symbol may also be separated from a pilot symbol by one or more symbols. After a plurality of frame synchronization symbols, there are usually a plurality of reserved symbols, which can be reserved for other purposes in the future. 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 portion 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 a plurality of second-class subframes, which is not limited in this application. The remaining symbols are pre-framing symbols (i.e., payload symbols) containing information and verification, wherein there is no overlap between the pilot symbol and the reserved symbol, and there is no overlap between the pilot symbol and the pre-framing symbol. 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.

[0177] 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 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, pilot symbols represented by 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 7 As 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 8As 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.

[0178] It should be noted that each frame synchronization symbol is -A FAW -A FAW j, -A FAW +A FAW j. A FAW -A FAW j and A FAW +A FAW j is one of the four plural forms, A FAW is a real number, where A FAW It may or may not be equal to A. Typically, A FAW Equal to A, at this time, the operation of inserting training symbols, pilot symbols, and frame synchronization symbols during the framing operation is relatively simple.

[0179] 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 or It is also possible to use other normalization methods, which are not limited in this application.

[0180] 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 or It is also possible to use other normalization methods, which are not limited in this application.

[0181] 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.

[0182] 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 One of the values ​​of real number A satisfies For example, real numbers The value of the pilot symbol is One of them.

[0183] 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.

[0184] 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.

[0185] It should be noted that in the first type of subframe, N FAW The sum of the real parts of the frame synchronization symbols is 0. FAW The sum of the imaginary parts of the frame synchronization symbols is 0. Therefore, the frame synchronization symbol sequence in the first type of subframe can achieve DC balance, which is beneficial for the receiving end to restore the signal quality.

[0186] 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 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.

[0187] 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.

[0188] In one possible scenario, in one subframe, the frame synchronization symbols and pilot symbols in two polarization directions are N in total. FAW +N PS The number of -A-Aj in the symbols, the frame synchronization symbols and pilot symbols in the two polarization directions are N FAW +N PS The number of symbols is -A+Aj, the number of frame synchronization symbols and pilot symbols in two polarization directions is N FAW +N PS The number of A-Aj in the symbols and the number of frame synchronization symbols and pilot symbols in the two polarization directions are N FAW +N PS The number of A+Aj in each symbol is the same, which effectively ensures the balance of the number of symbols in the two polarization directions.

[0189] As an example, N FAW +N PS The number of pilot symbols and frame synchronization symbols in the two polarization directions is -A-Aj respectively. and N FAW +N PSThe sum of the number of pilot symbols and frame synchronization symbols in the two polarization directions is -A-Aj is (N FAW +N PS ) / 2; N FAW +N PS The number of pilot symbols and frame synchronization symbols in the two polarization directions is -A+Aj respectively. and N FAW +N PS The sum of the number of pilot symbols and frame synchronization symbols in the two polarization directions is -A+Aj is (N FAW +N PS ) / 2; N FAW +N PS The number of pilot symbols and frame synchronization symbols in the two polarization directions is A-Aj respectively. and N FAW +N PS The sum of the number of pilot symbols and frame synchronization symbols A-Aj in the two polarization directions is (N FAW +N PS ) / 2; N FAW +N PS The number of pilot symbols and frame synchronization symbols in the two polarization directions is A+Aj respectively. and N FAW +N PS The sum of the number of pilot symbols and frame synchronization symbols in the two polarization directions is A+Aj is (N FAW +N PS ) / 2.

[0190] As another example, N FAW +N PS The number of pilot symbols and frame synchronization symbols in the two polarization directions is -A-Aj respectively. and N FAW +N PS The sum of the number of pilot symbols and frame synchronization symbols in the two polarization directions is -A-Aj is (N FAW +N PS ) / 2; N FAW +N PS The number of pilot symbols and frame synchronization symbols in the two polarization directions is -A+Aj respectively. and N FAW +N PS The sum of the number of pilot symbols and frame synchronization symbols in the two polarization directions is -A+Aj is (N FAW +N PS ) / 2; NFAW +N PS The number of pilot symbols and frame synchronization symbols in the two polarization directions is A-Aj respectively. and N FAW +N PS The sum of the number of pilot symbols and frame synchronization symbols A-Aj in the two polarization directions is (N FAW +N PS ) / 2; N FAW +N PS The number of pilot symbols and frame synchronization symbols in the two polarization directions is A+Aj respectively. and N FAW +N PS The sum of the number of pilot symbols and frame synchronization symbols in the two polarization directions is A+Aj is (N FAW +N PS ) / 2.

[0191] It should be noted that, in the embodiment of the present application, the number N of pre-framing symbols in the superframe is CW The 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.

[0192] 102. Send a superframe.

[0193] The superframe sent by the transmitter will reach the receiver through the channel transmission.

[0194] 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 QThe 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.

[0195] 103. The receiving end decodes the superframe.

[0196] 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 .

[0197] 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.

[0198] (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 even number, N FAW is an even number, N PS is an even number, the corresponding N RES >0,OH=(N F -N CW ) / N CW .

[0199] 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.

[0200] The frame redundancy of the superframe structure of 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.

[0201] Table 1

[0202]

[0203]

[0204] 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 S must 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.

[0205] Table 2

[0206] 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％ 180 2 6 226 28928 173568 0.89％ 180

[0207] 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. 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.

[0208] Table 3

[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％ 180

[0210] (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 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 4, where N FAW +N PS is an even number, N FAW is an even number, N PS is an even number, the corresponding N RES >0,OH=(N F -N CW ) / N CW .

[0211] The frame redundancy of the superframe architecture of 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.

[0212] Table 4

[0213]

[0214]

[0215] 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. 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, for the number of symbols N in each subframe S No limitation.

[0216] Table 5

[0217] 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％ 360 2 151 18 2304 347904 1.12％ 1122 3 113 24 3072 347136 0.89％ 360 4 12 226 28928 347136 0.89％ 360 5 9 302 38656 347904 1.12％ 1122

[0218] 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 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.

[0219] Table 6

[0220] 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％ 360 2 151 18 2304 347904 1.12％ 1122 3 113 24 3072 347136 0.89％ 360

[0221] (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 even number, N FAW is an even number, NPS is an even number, the corresponding N RES >0,OH=(N F -N CW ) / N CW .

[0222] 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.

[0223] Table 7

[0224] Serial number <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW +N RES ]]> 1 407 10 1280 520960 0.94％ 794 2 339 12 1536 520704 0.89％ 540 3 291 14 1792 521472 1.04％ 1302 4 254 16 2048 520192 0.79％ 32 5 226 18 2304 520704 0.89％ 540 6 204 20 2560 522240 1.19％ 2064 7 185 22 2816 520960 0.94％ 794 8 170 24 3072 522240 1.19％ 2064 9 136 30 3840 522240 1.19％ 2064 10 127 32 4096 520192 0.79％ 32 11 120 34 4352 522240 1.19％ 2064 12 113 36 4608 520704 0.89％ 540 13 107 38 4864 520448 0.84％ 286 14 102 40 5120 522240 1.19％ 2064 15 97 42 5376 521472 1.04％ 1302 16 85 48 6144 522240 1.19％ 2064 17 68 60 7680 522240 1.19％ 2064 18 60 68 8704 522240 1.19％ 2064 19 55 74 9472 520960 0.94％ 794 20 51 80 10240 522240 1.19％ 2064 21 40 102 13056 522240 1.19％ 2064 22 37 110 14080 520960 0.94％ 794 23 34 120 15360 522240 1.19％ 2064 24 30 136 17408 522240 1.19％ 2064 25 24 170 21760 522240 1.19％ 2064 26 21 194 24832 521472 1.04％ 1302 27 20 204 26112 522240 1.19％ 2064 28 19 214 27392 520448 0.84％ 286 29 18 226 28928 520704 0.89％ 540 30 17 240 30720 522240 1.19％ 2064 31 16 254 32512 520192 0.79％ 32 32 15 272 34816 522240 1.19％ 2064 33 12 340 43520 522240 1.19％ 2064 34 11 370 47360 520960 0.94％ 794

[0225] 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 7, we can get Table 8. Then the frame redundancy OH of the case listed in is less than 1.20%, and the number of symbols in the superframe N 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.

[0226] Table 8

[0227] 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％ 540 2 291 14 1792 521472 1.04％ 1302 3 226 18 2304 520704 0.89％ 540 4 204 20 2560 522240 1.19％ 2064 5 170 24 3072 522240 1.19％ 2064 6 136 30 3840 522240 1.19％ 2064 7 120 34 4352 522240 1.19％ 2064 8 113 36 4608 520704 0.89％ 540 9 102 40 5120 522240 1.19％ 2064 10 97 42 5376 521472 1.04％ 1302 11 85 48 6144 522240 1.19％ 2064 12 68 60 7680 522240 1.19％ 2064 13 60 68 8704 522240 1.19％ 2064 14 51 80 10240 522240 1.19％ 2064 15 40 102 13056 522240 1.19％ 2064 16 34 120 15360 522240 1.19％ 2064 17 30 136 17408 522240 1.19％ 2064 18 24 170 21760 522240 1.19％ 2064 19 21 194 24832 521472 1.04％ 1302 20 20 204 26112 522240 1.19％ 2064 21 18 226 28928 520704 0.89％ 540 22 17 240 30720 522240 1.19％ 2064 23 15 272 34816 522240 1.19％ 2064 24 12 340 43520 522240 1.19％ 2064

[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, 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.

[0229] Table 9

[0230]

[0231]

[0232] (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 even number, N FAW is an even number, N PS is an even number, the corresponding N RES >0,OH=(N F -N CW ) / N CW .

[0233] The frame redundancy of the superframe structure of the case listed in Table 10 is low, OH<1.20%. For the number of symbols N in each subframe in Table 10, S and the number of symbols in the superframe N F There is no limitation.

[0234] Table 10

[0235]

[0236]

[0237] 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 10, we can get the frame redundancy OH<1.20% in the case listed in Table 11, and the number of symbols N in the superframe 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.

[0238] Table 11

[0239] 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％ 720 2 339 16 2048 694272 0.89％ 720 3 302 18 2304 695808 1.12％ 2244 4 226 24 3072 694272 0.89％ 720 5 181 30 3840 695040 1.00％ 1482 6 151 36 4608 695808 1.12％ 2244 7 113 48 6144 694272 0.89％ 720 8 24 226 28928 694272 0.89％ 720 9 18 302 38656 695808 1.12％ 2244 10 15 362 46336 695040 1.00％ 1482

[0240] 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.

[0241] Table 12

[0242] 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％ 720 2 302 18 2304 695808 1.12％ 2244 3 226 24 3072 694272 0.89％ 720 4 181 30 3840 695040 1.00％ 1482 5 151 36 4608 695808 1.12％ 2244 6 113 48 6144 694272 0.89％ 720

[0243] (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 even number, N FAW is an even 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 structure in 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.

[0244] Table 13

[0245]

[0246]

[0247] 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.

[0248] Table 14

[0249] Serial number <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW +N RES ]]> 1 99 12 1536 152064 1.02％ 348 2 66 18 2304 152064 1.02％ 348 3 54 22 2816 152064 1.02％ 348 4 33 36 4608 152064 1.02％ 348 5 27 44 5632 152064 1.02％ 348 6 22 54 6912 152064 1.02％ 348 7 18 66 8448 152064 1.02％ 348 8 11 108 13824 152064 1.02％ 348 9 9 132 16896 152064 1.02％ 348 10 6 198 25344 152064 1.02％ 348 11 3 396 50688 152064 1.02％ 348

[0250] 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.

[0251] Table 15

[0252]

[0253]

[0254] (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 even number, N FAW is an even 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 structure in the case listed in Table 16 is low, OH<1.20%, and 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 (6) there is no superframe symbol number N F The number is not an integer multiple of 192 or 128.

[0255] Table 16

[0256] Serial number <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW +N RES ]]> 1 102 10 1280 130560 1.19％ 516 2 85 12 1536 130560 1.19％ 516 3 51 20 2560 130560 1.19％ 516 4 34 30 3840 130560 1.19％ 516 5 30 34 4352 130560 1.19％ 516 6 17 60 7680 130560 1.19％ 516 7 15 68 8704 130560 1.19％ 516 8 10 102 13056 130560 1.19％ 516 9 6 170 21760 130560 1.19％ 516 10 5 204 26112 130560 1.19％ 516 11 3 340 43520 130560 1.19％ 516

[0257] 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 SBoth are integer multiples of 192 and 128.

[0258] Table 17

[0259] 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％ 516 2 34 30 3840 130560 1.19％ 516 3 17 60 7680 130560 1.19％ 516 4 10 102 13056 130560 1.19％ 516 5 5 204 26112 130560 1.19％ 516

[0260] (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 FAW and 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 even number, N FAW is an even 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 structure in the case listed in Table 18 is low, OH<1.20%. Table 18 gives 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.

[0261] Table 18

[0262] 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％ 430 2 53 16 2048 108544 0.95％ 176 3 25 34 4352 108800 1.19％ 430 4 17 50 6400 108800 1.19％ 430 5 8 106 13568 108544 0.95％ 176 6 5 170 21760 108800 1.19％ 430 7 4 212 27136 108544 0.95％ 176

[0263] (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 even number, N FAW is an even number, N PS is an even number, the corresponding N RES >0,OH=(N F -N CW ) / N CW .

[0264] 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.

[0265] Table 19

[0266] 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％ 406 2 77 18 2304 177408 1.02％ 406 3 63 22 2816 177408 1.02％ 406 4 33 42 5376 177408 1.02％ 406 5 21 66 8448 177408 1.02％ 406 6 11 126 16128 177408 1.02％ 406 7 9 154 19712 177408 1.02％ 406 8 7 198 25344 177408 1.02％ 406 9 4 346 44288 177152 0.87％ 152

[0267] 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.

[0268] Table 20

[0269]

[0270]

[0271] 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. SIt 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.

[0272] Table 21

[0273] 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％ 406 2 33 42 5376 177408 1.02％ 406 3 21 66 8448 177408 1.02％ 406 4 11 126 16128 177408 1.02％ 406 5 7 198 25344 177408 1.02％ 406

[0274] (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 even number, N FAW is an even 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 structure in 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.

[0275] Table 22

[0276]

[0277]

[0278] 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, for the number of symbols N in each subframe S No limitation.

[0279] Table 23

[0280] 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％ 812 2 198 14 1792 354816 1.02％ 812 3 154 18 2304 354816 1.02％ 812 4 126 22 2816 354816 1.02％ 812 5 99 28 3584 354816 1.02％ 812 6 77 36 4608 354816 1.02％ 812 7 66 42 5376 354816 1.02％ 812 8 63 44 5632 354816 1.02％ 812 9 42 66 8448 354816 1.02％ 812 10 33 84 10752 354816 1.02％ 812 11 22 126 16128 354816 1.02％ 812 12 21 132 16896 354816 1.02％ 812 13 18 154 19712 354816 1.02％ 812 14 14 198 25344 354816 1.02％ 812 15 11 252 32256 354816 1.02％ 812 16 9 308 39424 354816 1.02％ 812 17 7 396 50688 354816 1.02％ 812

[0281] 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.

[0282] Table 24

[0283]

[0284]

[0285] (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 even number, N FAW is an even 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 structure of the case listed in Table 25 is low, OH<1.20%. Table 25 gives the number of symbols N in each subframe. S and the number of symbols in the superframe N F There is no limitation.

[0286] Table 25

[0287] Serial number <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW +N RES ]]> 1 415 10 1280 531200 0.83％ 202 2 346 12 1536 531456 0.87％ 456 3 297 14 1792 532224 1.02％ 1218 4 260 16 2048 532480 1.07％ 1472 5 231 18 2304 532224 1.02％ 1218 6 208 20 2560 532480 1.07％ 1472 7 189 22 2816 532224 1.02％ 1218 8 173 24 3072 531456 0.87％ 456 9 160 26 3328 532480 1.07％ 1472 10 130 32 4096 532480 1.07％ 1472 11 104 40 5120 532480 1.07％ 1472 12 99 42 5376 532224 1.02％ 1218 13 83 50 6400 531200 0.83％ 202 14 80 52 6656 532480 1.07％ 1472 15 77 54 6912 532224 1.02％ 1218 16 67 62 7936 531712 0.92％ 710 17 65 64 8192 532480 1.07％ 1472 18 63 66 8448 532224 1.02％ 1218 19 52 80 10240 532480 1.07％ 1472 20 40 104 13312 532480 1.07％ 1472 21 33 126 16128 532224 1.02％ 1218 22 32 130 16640 532480 1.07％ 1472 23 31 134 17152 531712 0.92％ 710 24 27 154 19712 532224 1.02％ 1218 25 26 160 20480 532480 1.07％ 1472 26 25 166 21248 531200 0.83％ 202 27 21 198 25344 532224 1.02％ 1218 28 20 208 26624 532480 1.07％ 1472 29 16 260 33280 532480 1.07％ 1472 30 13 320 40960 532480 1.07％ 1472 31 12 346 44288 531456 0.87％ 456 32 11 378 48384 532224 1.02％ 1218

[0288] 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.

[0289] Table 26

[0290] 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％ 456 2 297 14 1792 532224 1.02％ 1218 3 231 18 2304 532224 1.02％ 1218 4 189 22 2816 532224 1.02％ 1218 5 173 24 3072 531456 0.87％ 456 6 99 42 5376 532224 1.02％ 1218 7 77 54 6912 532224 1.02％ 1218 8 63 66 8448 532224 1.02％ 1218 9 33 126 16128 532224 1.02％ 1218 10 27 154 19712 532224 1.02％ 1218 11 21 198 25344 532224 1.02％ 1218 12 12 346 44288 531456 0.87％ 456 13 11 378 48384 532224 1.02％ 1218

[0291] 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 Fand the number of symbols in each subframe N S Both are integer multiples of 192 and 128.

[0292] Table 27

[0293] 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％ 456 2 231 18 2304 532224 1.02％ 1218 3 173 24 3072 531456 0.87％ 456 4 99 42 5376 532224 1.02％ 1218 5 77 54 6912 532224 1.02％ 1218 6 63 66 8448 532224 1.02％ 1218 7 33 126 16128 532224 1.02％ 1218 8 21 198 25344 532224 1.02％ 1218 9 11 378 48384 532224 1.02％ 1218

[0294] (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 even number, N FAW is an even 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 structure in the case listed in Table 28 is low, OH<1.20%. Table 28 gives the number of symbols N in each subframe. S and the number of symbols in the superframe N F There is no limitation.

[0295] Table 28

[0296]

[0297]

[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, 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.

[0299] Table 29

[0300] 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％ 100 2 396 14 1792 709632 1.02％ 1624 3 308 18 2304 709632 1.02％ 1624 4 252 22 2816 709632 1.02％ 1624 5 231 24 3072 709632 1.02％ 1624 6 213 26 3328 708864 0.91％ 862 7 198 28 3584 709632 1.02％ 1624 8 185 30 3840 710400 1.13％ 2386 9 154 36 4608 709632 1.02％ 1624 10 132 42 5376 709632 1.02％ 1624 11 126 44 5632 709632 1.02％ 1624 12 111 50 6400 710400 1.13％ 2386 13 99 56 7168 709632 1.02％ 1624 14 84 66 8448 709632 1.02％ 1624 15 77 72 9216 709632 1.02％ 1624 16 75 74 9472 710400 1.13％ 2386 17 71 78 9984 708864 0.91％ 862 18 66 84 10752 709632 1.02％ 1624 19 63 88 11264 709632 1.02％ 1624 20 44 126 16128 709632 1.02％ 1624 21 42 132 16896 709632 1.02％ 1624 22 39 142 18176 708864 0.91％ 862 23 37 150 19200 710400 1.13％ 2386 24 36 154 19712 709632 1.02％ 1624 25 33 168 21504 709632 1.02％ 1624 26 28 198 25344 709632 1.02％ 1624 27 25 222 28416 710400 1.13％ 2386 28 22 252 32256 709632 1.02％ 1624 29 21 264 33792 709632 1.02％ 1624 30 18 308 39424 709632 1.02％ 1624 31 15 370 47360 710400 1.13％ 2386 32 14 396 50688 709632 1.02％ 1624

[0301] 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 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.

[0302] Table 30

[0303]

[0304]

[0305] (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 even number, N FAW is an even number, N PS is an even number, the corresponding N RES >0,OH=(N F -N CW ) / N CW .

[0306] 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.

[0307] Table 31

[0308] 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％ 108 2 101 18 1728 174528 1.45％ 678 3 9 202 19392 174528 1.45％ 678 4 6 302 28992 173952 1.12％ 108

[0309] 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.

[0310] Table 32

[0311] 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％ 108 2 6 302 28992 173952 1.12％ 108

[0312] 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.

[0313] Table 33

[0314] 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％ 108

[0315] (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 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 34, where N FAW +N PS is an even number, N FAW is an even number, N PS is an even number, the corresponding N RES >0,OH=(N F -N CW ) / N CW .

[0316] 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.

[0317] Table 34

[0318] Serial number <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW +N RES ]]> 1 363 10 960 348480 1.28％ 786 2 302 12 1152 347904 1.12％ 216 3 259 14 1344 348096 1.17％ 406 4 227 16 1536 348672 1.34％ 976 5 202 18 1728 349056 1.45％ 1356 6 165 22 2112 348480 1.28％ 786 7 151 24 2304 347904 1.12％ 216 8 121 30 2880 348480 1.28％ 786 9 101 36 3456 349056 1.45％ 1356 10 79 46 4416 348864 1.40％ 1166 11 55 66 6336 348480 1.28％ 786 12 49 74 7104 348096 1.17％ 406 13 37 98 9408 348096 1.17％ 406 14 33 110 10560 348480 1.28％ 786 15 23 158 15168 348864 1.40％ 1166 16 18 202 19392 349056 1.45％ 1356 17 15 242 23232 348480 1.28％ 786 18 12 302 28992 347904 1.12％ 216 19 11 330 31680 348480 1.28％ 786

[0319] 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.

[0320] Table 35

[0321]

[0322]

[0323] 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 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.

[0324] Table 36

[0325] 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％ 216 2 227 16 1536 348672 1.34％ 976 3 151 24 2304 347904 1.12％ 216 4 101 36 3456 349056 1.45％ 1356

[0326] (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 even number, N FAW is an even number, N PS is an even number, the corresponding N RES >0,OH=(N F -N CW ) / N CW .

[0327] 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.

[0328] Table 37

[0329]

[0330]

[0331] 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 is F is an integer multiple of 192 and 128. In addition, Table 38 gives the number of symbols N in each subframe. S No limitation.

[0332] Table 38

[0333]

[0334]

[0335] 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.

[0336] Table 39

[0337] Serial number <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW +N RES <!-- 37 -->]]> 1 453 12 1152 521856 1.12％ 324 2 340 16 1536 522240 1.19％ 704 3 272 20 1920 522240 1.19％ 704 4 227 24 2304 523008 1.34％ 1464 5 170 32 3072 522240 1.19％ 704 6 151 36 3456 521856 1.12％ 324 7 136 40 3840 522240 1.19％ 704 8 124 44 4224 523776 1.49％ 2224 9 85 64 6144 522240 1.19％ 704 10 80 68 6528 522240 1.19％ 704 11 68 80 7680 522240 1.19％ 704 12 62 88 8448 523776 1.49％ 2224 13 47 116 11136 523392 1.41％ 1844 14 44 124 11904 523776 1.49％ 2224 15 40 136 13056 522240 1.19％ 704 16 34 160 15360 522240 1.19％ 704 17 31 176 16896 523776 1.49％ 2224 18 29 188 18048 523392 1.41％ 1844 19 22 248 23808 523776 1.49％ 2224 20 20 272 26112 522240 1.19％ 704 21 17 320 30720 522240 1.19％ 704 22 16 340 32640 522240 1.19％ 704

[0338] (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 even number, N FAW is an even number, N PS is an even number, the corresponding N RES >0,OH=(N F -N CW ) / N CW .

[0339] 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.

[0340] Table 40

[0341]

[0342]

[0343] 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.

[0344] Table 41

[0345]

[0346]

[0347] 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 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.

[0348] Table 42

[0349] Serial number <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW +N RES ]]> 1 604 12 1152 695808 1.12％ 432 2 453 16 1536 695808 1.12％ 432 3 363 20 1920 696960 1.28％ 1572 4 302 24 2304 695808 1.12％ 432 5 259 28 2688 696192 1.17％ 812 6 227 32 3072 697344 1.34％ 1952 7 202 36 3456 698112 1.45％ 2712 8 165 44 4224 696960 1.28％ 1572 9 151 48 4608 695808 1.12％ 432 10 121 60 5760 696960 1.28％ 1572 11 101 72 6912 698112 1.45％ 2712 12 79 92 8832 697728 1.40％ 2332 13 55 132 12672 696960 1.28％ 1572 14 49 148 14208 696192 1.17％ 812 15 37 196 18816 696192 1.17％ 812 16 33 220 21120 696960 1.28％ 1572 17 23 316 30336 697728 1.40％ 2332

[0350] (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 even number, N FAW is an even number, N PS is an even number, the corresponding N RES >0,OH=(N F -N CW ) / N CW .

[0351] 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 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 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 F and the number of symbols in each subframe N S The number of symbols in the superframe is not 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.

[0352] Table 43

[0353]

[0354]

[0355] (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 even number, N FAW is an even number, N PS is an even number, the corresponding N RES >0,OH=(N F -N CW ) / N CW .

[0356] 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. Sand 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.

[0357] Table 44

[0358] Serial number <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW +N RES ]]> 1 136 10 960 130560 1.19％ 176 2 85 16 1536 130560 1.19％ 176 3 68 20 1920 130560 1.19％ 176 4 62 22 2112 130944 1.49％ 556 5 40 34 3264 130560 1.19％ 176 6 34 40 3840 130560 1.19％ 176 7 31 44 4224 130944 1.49％ 556 8 22 62 5952 130944 1.49％ 556 9 20 68 6528 130560 1.19％ 176 10 17 80 7680 130560 1.19％ 176 11 11 124 11904 130944 1.49％ 556 12 10 136 13056 130560 1.19％ 176 13 8 170 16320 130560 1.19％ 176 14 5 272 26112 130560 1.19％ 176 15 4 340 32640 130560 1.19％ 176

[0359] 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.

[0360] Table 45

[0361]

[0362]

[0363] (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 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 46, where N FAW +N PS is an even number, N FAW is an even 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 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.

[0365] Table 46

[0366] Serial number <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW +N RES ]]> 1 81 14 1344 108864 1.25％ 210 2 71 16 1536 109056 1.43％ 400 3 63 18 1728 108864 1.25％ 210 4 27 42 4032 108864 1.25％ 210 5 21 54 5184 108864 1.25％ 210 6 9 126 12096 108864 1.25％ 210 7 8 142 13632 109056 1.43％ 400 8 7 162 15552 108864 1.25％ 210 9 4 284 27264 109056 1.43％ 400 10 3 378 36288 108864 1.25％ 210

[0367] 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.

[0368] Table 47

[0369] 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％ 400 2 8 142 13632 109056 1.43％ 400 3 4 284 27264 109056 1.43％ 400

[0370] 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 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.

[0371] Table 48

[0372]

[0373]

[0374] (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 even number, N FAW is an even number, N PS is an even number, the corresponding N RES >0,OH=(N F -N CW ) / N CW .

[0375] 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.

[0376] Table 49

[0377] Serial number <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW +N RES ]]> 1 185 10 960 177600 1.13％ 134 2 116 16 1536 178176 1.46％ 704 3 103 18 1728 177984 1.35％ 514 4 58 32 3072 178176 1.46％ 704 5 37 50 4800 177600 1.13％ 134 6 32 58 5568 178176 1.46％ 704 7 29 64 6144 178176 1.46％ 704 8 25 74 7104 177600 1.13％ 134 9 16 116 11136 178176 1.46％ 704 10 9 206 19776 177984 1.35％ 514 11 8 232 22272 178176 1.46％ 704 12 5 370 35520 177600 1.13％ 134

[0378] 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 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.

[0379] Table 50

[0380] 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％ 704 2 58 32 3072 178176 1.46％ 704 3 32 58 5568 178176 1.46％ 704 4 29 64 6144 178176 1.46％ 704 5 16 116 11136 178176 1.46％ 704 6 8 232 22272 178176 1.46％ 704

[0381] 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 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.

[0382] Table 51

[0383]

[0384]

[0385] (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 PSis an even number, N FAW is an even number, N PS is an even number, the corresponding N RES >0,OH=(N F -N CW ) / N CW .

[0386] 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.

[0387] Table 52

[0388] 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％ 268 2 309 12 1152 355968 1.35％ 1028 3 265 14 1344 356160 1.40％ 1218 4 232 16 1536 356352 1.46％ 1408 5 206 18 1728 355968 1.35％ 1028 6 185 20 1920 355200 1.13％ 268 7 116 32 3072 356352 1.46％ 1408 8 109 34 3264 355776 1.29％ 838 9 103 36 3456 355968 1.35％ 1028 10 74 50 4800 355200 1.13％ 268 11 64 58 5568 356352 1.46％ 1408 12 58 64 6144 356352 1.46％ 1408 13 53 70 6720 356160 1.40％ 1218 14 50 74 7104 355200 1.13％ 268 15 43 86 8256 355008 1.08％ 78 16 37 100 9600 355200 1.13％ 268 17 35 106 10176 356160 1.40％ 1218 18 32 116 11136 356352 1.46％ 1408 19 29 128 12288 356352 1.46％ 1408 20 25 148 14208 355200 1.13％ 268 21 18 206 19776 355968 1.35％ 1028 22 17 218 20928 355776 1.29％ 838 23 16 232 22272 356352 1.46％ 1408 24 10 370 35520 355200 1.13％ 268

[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, 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.

[0390] Table 53

[0391] 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％ 268 2 309 12 1152 355968 1.35％ 1028 3 232 16 1536 356352 1.46％ 1408 4 206 18 1728 355968 1.35％ 1028 5 185 20 1920 355200 1.13％ 268 6 116 32 3072 356352 1.46％ 1408 7 103 36 3456 355968 1.35％ 1028 8 74 50 4800 355200 1.13％ 268 9 64 58 5568 356352 1.46％ 1408 10 58 64 6144 356352 1.46％ 1408 11 50 74 7104 355200 1.13％ 268 12 37 100 9600 355200 1.13％ 268 13 32 116 11136 356352 1.46％ 1408 14 29 128 12288 356352 1.46％ 1408 15 25 148 14208 355200 1.13％ 268 16 18 206 19776 355968 1.35％ 1028 17 16 232 22272 356352 1.46％ 1408 18 10 370 35520 355200 1.13％ 268

[0392] 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.

[0393] Table 54

[0394] 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％ 1028 2 232 16 1536 356352 1.46％ 1408 3 185 20 1920 355200 1.13％ 268 4 116 32 3072 356352 1.46％ 1408 5 103 36 3456 355968 1.35％ 1028 6 58 64 6144 356352 1.46％ 1408 7 37 100 9600 355200 1.13％ 268 8 32 116 11136 356352 1.46％ 1408 9 29 128 12288 356352 1.46％ 1408 10 25 148 14208 355200 1.13％ 268 11 16 232 22272 356352 1.46％ 1408

[0395] (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 even number, N FAW is an even number, N PS is an even number, the corresponding N RES >0,OH=(N F -N CW ) / N CW .

[0396] 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.

[0397] Table 55

[0398] Serial number <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW +N RES ]]> 1 555 10 960 532800 1.13％ 402 2 463 12 1152 533376 1.24％ 972 3 397 14 1344 533568 1.28％ 1162 4 347 16 1536 532992 1.17％ 592 5 309 18 1728 533952 1.35％ 1542 6 278 20 1920 533760 1.31％ 1352 7 253 22 2112 534336 1.42％ 1922 8 232 24 2304 534528 1.46％ 2112 9 214 26 2496 534144 1.38％ 1732 10 185 30 2880 532800 1.13％ 402 11 174 32 3072 534528 1.46％ 2112 12 146 38 3648 532608 1.09％ 212 13 139 40 3840 533760 1.31％ 1352 14 121 46 4416 534336 1.42％ 1922 15 116 48 4608 534528 1.46％ 2112 16 111 50 4800 532800 1.13％ 402 17 107 52 4992 534144 1.38％ 1732 18 103 54 5184 533952 1.35％ 1542 19 96 58 5568 534528 1.46％ 2112 20 87 64 6144 534528 1.46％ 2112 21 75 74 7104 532800 1.13％ 402 22 73 76 7296 532608 1.09％ 212 23 59 94 9024 532416 1.06％ 22 24 58 96 9216 534528 1.46％ 2112 25 48 116 11136 534528 1.46％ 2112 26 47 118 11328 532416 1.06％ 22 27 38 146 14016 532608 1.09％ 212 28 37 150 14400 532800 1.13％ 402 29 32 174 16704 534528 1.46％ 2112 30 29 192 18432 534528 1.46％ 2112 31 27 206 19776 533952 1.35％ 1542 32 26 214 20544 534144 1.38％ 1732 33 25 222 21312 532800 1.13％ 402 34 24 232 22272 534528 1.46％ 2112 35 23 242 23232 534336 1.42％ 1922 36 20 278 26688 533760 1.31％ 1352 37 19 292 28032 532608 1.09％ 212 38 16 348 33408 534528 1.46％ 2112 39 15 370 35520 532800 1.13％ 402

[0399] 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.

[0400] Table 56

[0401] 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％ 972 2 347 16 1536 532992 1.17％ 592 3 278 20 1920 533760 1.31％ 1352 4 232 24 2304 534528 1.46％ 2112 5 214 26 2496 534144 1.38％ 1732 6 174 32 3072 534528 1.46％ 2112 7 146 38 3648 532608 1.09％ 212 8 139 40 3840 533760 1.31％ 1352 9 116 48 4608 534528 1.46％ 2112 10 107 52 4992 534144 1.38％ 1732 11 96 58 5568 534528 1.46％ 2112 12 87 64 6144 534528 1.46％ 2112 13 73 76 7296 532608 1.09％ 212 14 58 96 9216 534528 1.46％ 2112 15 48 116 11136 534528 1.46％ 2112 16 38 146 14016 532608 1.09％ 212 17 32 174 16704 534528 1.46％ 2112 18 29 192 18432 534528 1.46％ 2112 19 26 214 20544 534144 1.38％ 1732 20 24 232 22272 534528 1.46％ 2112 21 20 278 26688 533760 1.31％ 1352 22 19 292 28032 532608 1.09％ 212 23 16 348 33408 534528 1.46％ 2112

[0402] 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 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.

[0403] Table 57

[0404]

[0405]

[0406] (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 even number, N FAW is an even number, N PS is an even number, the corresponding N RES >0,OH=(N F -N CW ) / N CW .

[0407] 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 NF There is no limitation.

[0408] Table 58

[0409]

[0410]

[0411] 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 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.

[0412] Table 59

[0413]

[0414]

[0415] 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. Then the frame redundancy OH of the case listed in Table 60 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.

[0416] Table 60

[0417]

[0418]

[0419] It should be noted that in some specific applications, the number of frame synchronization symbols NFAW =22, the specific frame synchronization symbol sequence is as follows:

[0420]

[0421] The present application also provides several embodiments, which are described as follows:

[0422] Embodiment 1: A specific form of a frame synchronization symbol sequence.

[0423] Number of frame synchronization symbols N FAW=22, where, in one polarization direction, the 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 the other polarization direction, the 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. It should be noted that in some specific applications, the first pilot symbol will be combined with the frame synchronization symbol for frame synchronization or link training and other purposes. The first symbol of the first type of subframe is the first symbol of the pilot symbol sequence, and its value can be one of 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 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.

[0424] For example, when the first symbol of the pilot symbol sequence is -3+3j in one polarization direction and 3+3j in the other polarization direction, the first symbol of the pilot symbol sequence in one polarization direction and the frame synchronization symbol sequence (23 symbols in total) 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, and the first symbol of the pilot symbol sequence and the frame synchronization symbol sequence (a total of 23 symbols) in another polarization direction 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. At this time, the sequence of the real part of the complex number corresponding to the first symbol of the pilot symbol sequence and 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 first symbol of the pilot symbol sequence and 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.

[0425] 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 , YQ The 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.

[0426] Embodiment 2: A specific superframe format.

[0427] 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:

[0428] Table 61

[0429] <![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％ 22 158

[0430] 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, 22 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 N in each subframe in the superframe S It is also an integer multiple of 192 and 128.

[0431] Embodiment 3: A specific superframe format

[0432] 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:

[0433] Table 62

[0434] <![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％ 22 338

[0435] 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, 22 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.

[0436] Embodiment 4: 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 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:

[0438] Table 63

[0439] <![CDATA[N SF ]]> <![CDATA[N PS ]]> <![CDATA[N S ]]> <![CDATA[N F ]]> OH <![CDATA[N FAW ]]> <![CDATA[N RES ]]> 113 36 4608 520704 0.89％ 22 518

[0440] 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, 22 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.

[0441] Embodiment 5: 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 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:

[0443] Table 64

[0444] <![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％ 22 698

[0445] 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, 22 frame synchronization symbols, and 698 reserved symbols. The structure of the second type of subframe is as follows: Fig.14 As 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 isF 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 6: A specific superframe format.

[0447] 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:

[0448] Table 65

[0449] <![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％ 22 326

[0450] 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, 22 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.

[0451] Embodiment 7: A specific superframe format.

[0452] 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:

[0453] Table 66

[0454] <![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％ 22 384

[0455] 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 8448 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, 22 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.

[0456] Embodiment 8: A specific superframe format.

[0457] 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, 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 67 below:

[0458] Table 67

[0459] <![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％ 22 434

[0460] 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, 22 frame synchronization symbols, and 434 reserved symbols. The structure of the second type of subframe is as follows: Fig.17As shown in (c), there are also 24 pilot symbols. In each subframe, the first symbol in every 128 symbols is a pilot symbol. In the existing 400G-ZR and 800G-ZR standards, the first subframe also contains 22 frame synchronization symbols, which is conducive to multiplexing. 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.

[0461] Embodiment 9: A specific superframe format.

[0462] 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, 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 68 below:

[0463] Table 68

[0464] <![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％ 22 840

[0465] 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, 22 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 the existing 400G-ZR and 800G-ZR standards, the first subframe also contains 22 frame synchronization symbols, which is conducive to multiplexing. 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.

[0466] Embodiment 10: A specific superframe format.

[0467] 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, and the pilot symbol interval is 96 symbols. The corresponding N SF 、N PS 、N FAW 、N RES 、N S 、N F , OH and other parameters are shown in Table 69 below:

[0468] Table 69

[0469] <![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％ 22 410

[0470] 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), there are 48 pilot symbols, 22 frame synchronization symbols, and 410 reserved symbols. In the existing 400G-ZR and 800G-ZR standards, the first type of subframe also contains 22 frame synchronization symbols, which is conducive to multiplexing. 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.

[0471] Embodiment 11: A specific superframe format.

[0472] 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, and each consecutive N PG = The fixed position symbol among the 96 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 70 below:

[0473] Table 70

[0474] <![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％ 22 154

[0475] Fig. 20 FIG. 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), there are 68 pilot symbols, 22 frame synchronization symbols, and 154 reserved symbols. In the existing 400G-ZR and 800G-ZR standards, the first subframe also contains 22 frame synchronization symbols, which is conducive to multiplexing. 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.

[0476] Embodiment 12: A specific superframe format.

[0477] 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, and each consecutive N PG = The fixed position symbol among the 96 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 71 below:

[0478] Table 71

[0479] <![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

[0480] Fig.21 FIG. 11 is a schematic diagram of the eleventh implementation of the superframe and subframe in the embodiment of the present application. The superframe includes 17 subframes, each subframe includes 7680 symbols, such as Fig.21 The structure of the first type of subframe is as shown in (a). Fig.21 As shown in (b), there are 80 pilot symbols, 22 frame synchronization symbols, and 154 reserved symbols. In the existing 400G-ZR and 800G-ZR standards, the first subframe also contains 22 frame synchronization symbols, which is conducive to multiplexing. The structure of the second type of subframe is as follows Fig.21As 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.

[0481] Embodiment 13: A specific superframe format.

[0482] 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, and each consecutive N PG = The fixed position symbol among the 96 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 72 below:

[0483] Table 72

[0484] <![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％ 22 246

[0485] 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), there are 100 pilot symbols, 22 frame synchronization symbols, and 246 reserved symbols. In the existing 400G-ZR and 800G-ZR standards, the first subframe also contains 22 frame synchronization symbols, which is conducive to multiplexing. 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.

[0486] Embodiment 14: A specific superframe format.

[0487] 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, and each consecutive N PG = The fixed position symbol among the 96 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 73 below:

[0488] Table 73

[0489] <![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％ 22 190

[0490] 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), there are 76 pilot symbols, 22 frame synchronization symbols, and 190 reserved symbols. In the existing 400G-ZR and 800G-ZR standards, the first subframe also contains 22 frame synchronization symbols, which is conducive to multiplexing. 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.

[0491] Embodiment 15: A specific superframe format.

[0492] 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, and each consecutive N PG = The fixed position symbol among the 96 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 74 below:

[0493] Table 74

[0494] <![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％ 22 134

[0495] 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 shown in (a). Fig.24 As shown in (b), there are 172 pilot symbols, 22 frame synchronization symbols, and 134 reserved symbols. In the existing 400G-ZR and 800G-ZR standards, the first subframe also contains 22 frame synchronization symbols, which is conducive to multiplexing. The structure of the second type of subframe is shown in Fig.24 As shown in (c), there are also 172 pilot symbols, such as Fig.24 (c) in each subframe; in each 96 symbols, the first symbol is a pilot symbol; 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 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.

[0496] 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.

[0497] 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.26As 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.

[0498] 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 shown in the figure, the transceiver 402 includes 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.

[0499] 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.

[0500] 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 data 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 N symbols include a pilot symbol located at a fixed position. PG is 96 or 128, 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 -A FAW -A FAW j, -A FAW +A FAW j. A FAW -A FAW j and A FAW +A FAW j is one of the four plural forms, A FAW is a real number, the N FAW is an even number; The superframe is transmitted.

2. The method according to claim 1, 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.

3. The method according to claim 1 or 2, 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 is 0. FAW The sum of the imaginary parts of the frame synchronization symbols is 0.

4. The method according to any one of claims 1 to 3, 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.

5. The method according to any one of claims 1 to 4, 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.

6. The method according to any one of claims 1 to 5, characterized in that The starting position of the first type of subframe is a pilot symbol.

7. The method according to claim 6, characterized in that N FAW The consecutive frame synchronization symbols are arranged starting from the next bit of the pilot symbol in the first type of subframe.

8. The method according to any one of claims 1 to 7, 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.

9. The method according to any one of claims 1 to 8, characterized in that The superframe includes at least one second-type subframe, and the second-type subframe also includes a pre-framing symbol.

10. The method according to any one of claims 1 to 9, 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.

11. The method according to any one of claims 1 to 10, 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.

12. The method according to any one of claims 1 to 11, characterized in that A=A FAW 。 13. A data 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 N symbols include a pilot symbol located at a fixed position. PG is 96 or 128, 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 -A FAW -A FAW j, -A FAW +A FAW j. A FAW -A FAW j and A FAW +A FAW j is one of the four plural forms, A FAW is a real number, the N FAW is an even number; The superframe is decoded.

14. The method according to claim 13, characterized in that The starting position of the first type of subframe is a pilot symbol.

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

16. 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 15.

17. 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 N symbols include a pilot symbol located at a fixed position. PG is 96 or 128, 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 -A FAW -A FAW j, -A FAW +A FAW j. A FAW -A FAW j and A FAW +A FAW j is one of the four plural forms, A FAW is a real number, the N FAW is an even number; The sending unit is used to send the superframe.

18. The data transmission device according to claim 17, 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.

19. The data transmission device according to claim 17 or 18, 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 is 0. FAW The sum of the imaginary parts of the frame synchronization symbols is 0.

20. The data transmission device according to any one of claims 17 to 19, 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.

21. The data transmission device according to any one of claims 17 to 20, 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.

22. The data transmission device according to any one of claims 17 to 21, characterized in that: The starting position of the first type of subframe is a pilot symbol.

23. The data transmission device according to claim 22, characterized in that: N FAW The consecutive frame synchronization symbols are arranged starting from the next bit of the pilot symbol in the first type of subframe.

24. The data transmission device according to any one of claims 17 to 23, 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.

25. The data transmission device according to any one of claims 17 to 24, characterized in that: The superframe includes at least one second-type subframe, and the second-type subframe also includes a pre-framing symbol.

26. The data transmission device according to any one of claims 17 to 25, 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.

27. The data transmission device according to any one of claims 17 to 26, 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.

28. The data transmission device according to any one of claims 17 to 27, characterized in that: A=A FAW 。 29. 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 N symbols include a pilot symbol located at a fixed position. PG is 96 or 128, 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 -A FAW -A FAW j, -A FAW +A FAW j. A FAW -A FAW j and A FAW +A FAW j is one of the four plural forms, A FAW is a real number, the N FAW is an even number; The processing unit is used for decoding the super frame.

30. The data transmission device according to claim 29, 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.

31. The data transmission device according to claim 29 or 30, 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 is 0. FAW The sum of the imaginary parts of the frame synchronization symbols is 0.

32. A data transmission system, characterized in that: include: The data transmission device according to any one of claims 17 to 28 and the data transmission device according to any one of claims 29 to 31.

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