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Coding modulation method and apparatus for high-order modulation, and decoding method and apparatus for high-order modulation

A high-order modulation and demodulation method technology, applied in the field of communication, can solve problems such as the deterioration of the bit error rate, the impact on system performance, and burst errors, and achieve the improvement of demodulation accuracy, high transmission efficiency, and optimal correction of random or The effect of sudden errors

Inactive Publication Date: 2013-12-04
HUAWEI TECH CO LTD
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  • Claims
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Problems solved by technology

[0004] In the communication system using the above-mentioned prior art, under some specific nonlinear transmission channels, such as in the environment of continuous burst errors, it is difficult to guarantee the bit error performance, and a large number of burst errors or random errors may occur. And lead to deterioration of the bit error rate (or frame error rate) of the system, thus affecting system performance

Method used

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  • Coding modulation method and apparatus for high-order modulation, and decoding method and apparatus for high-order modulation
  • Coding modulation method and apparatus for high-order modulation, and decoding method and apparatus for high-order modulation
  • Coding modulation method and apparatus for high-order modulation, and decoding method and apparatus for high-order modulation

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Embodiment 1

[0054] An embodiment of the present invention provides a coding and modulation method for high-order modulation in a communication system, and the method is applied to a communication system, such as figure 2 As shown, the method includes:

[0055]Step 101: converting the information to be transmitted into a bit data stream, and demultiplexing the bit data stream into more than one bit data stream;

[0056] Step 102: performing first-type encoding on at least one bit data stream among more than one bit data streams to obtain first output data;

[0057] Wherein, the first type of coding mentioned in step 102 can specifically be low density parity check code (LDPC, Low Density Parity Check) coding, or convolutional coding, or Polar code, or Turbo coding, or generalized Concatenated codes, or product codes, etc., are not exhaustive here, and may also be other advanced high-performance channel coding methods. If LDPC encoding is adopted, and the code rate of the LDPC encoder is...

Embodiment 2

[0070] An embodiment of the present invention provides a coding and modulation method for high-order modulation in a communication system. This method is similar to Embodiment 1, the difference is that in this embodiment, the first type of coding is LDPC coding, and the second type of coding is using LDPC coding. A specific example of BCH encoding. like image 3 As shown, the method includes:

[0071] Step 201: converting the information to be transmitted into a bit data stream, and demultiplexing the bit data stream into more than one bit data stream;

[0072] Step 202: performing LDPC encoding on more than one bit stream in the demultiplexed bit stream;

[0073] Step 203: punching out the LDPC encoded bit data stream;

[0074] Step 204: exclude the bit data streams used for LDPC encoding, and perform BCH encoding on all the bit data streams in the remaining bit data streams;

[0075] Step 205: Quadrature Amplitude Modulation (QAM) is performed on the bit data stream afte...

Embodiment 3

[0082] An embodiment of the present invention provides a coding and modulation method for high-order modulation in a communication system. This method is similar to Embodiment 2 and is applied to a communication system. The difference is that in this embodiment, high-order QAM processing is performed. , including bit streams that have not been type 1 or type 2 encoded. like Figure 5 As shown, in this embodiment, the first type of encoding still uses LDPC encoding as an example, and still includes puncturing processing, and the second type of encoding uses BCH encoding or RS encoding. The N-way bit data stream after the bit data stream is demultiplexed, that is, a 0 to a N , if the code rate of the current LDPC encoder is 3 / 4, then the bit data stream input to the LDPC encoder is 3-way, assuming a 0 to a 2 , output the bit data stream after LDPC encoding, punch the bit data stream after LDPC encoding, and output b 0 to b 3 These 4 bit data streams; a 3 to a 3+x After t...

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Abstract

Disclosed are a code modulation method and apparatus for high order modulation. The method comprises: converting information that needs to be transmitted into a bit data stream, and demultiplexing the bit data stream into more than one channel of bit data stream; performing first-type encoding on at least one channel of bit data stream in the more than one channel of bit data stream, to obtain first output data; performing second-type encoding on at least one of the remaining channels of bit data stream on which the first-type encoding is not performed, to obtain second output data; and performing quadrature amplitude modulation on the first output data and the second output data, to generate a modulation symbol for output. Compared with the prior art, the correctness rate of demodulation in the technical solution is improved significantly, achieving higher transmission efficiency.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a coding modulation and demodulation method and device for high-order modulation in a communication system. Background technique [0002] As the communication system's requirements for transmission rate and spectrum efficiency continue to increase, the communication system will adopt a higher-order quadrature amplitude modulation (QAM, Quadrature Amplitude Modulation) mode to meet the requirements for transmission rate and spectrum efficiency. [0003] In the prior art, a multi-layer coding and modulation solution is proposed, that is, the transmitted bit stream is demultiplexed and divided into parallel sub-information streams for channel coding, and then a unified symbol mapping is performed on each coded bit data to generate Symbolic data flow. Based on this scheme, the existing technology has proposed many engineering-realizable schemes from the perspective of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L27/36H04L27/38
CPCH04L1/007H04L1/0057H04L1/00H04L27/38H04L27/361
Inventor 王光健曾雁星刘坤鹏
Owner HUAWEI TECH CO LTD
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