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Low density odd-even check coding control method, system and terminal device

A technology of low-density parity and terminal equipment, which is applied in the field of data communication to achieve the effect of improving spectrum utilization and throughput

Inactive Publication Date: 2007-03-28
HUAWEI TECH CO LTD +1
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Problems solved by technology

[0005] The present invention provides a low-density parity-check coding control method, system and terminal equipment, which are used to solve the problem of how to improve the system throughput in the existing adaptive control mode based on low-density parity-check coding

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  • Low density odd-even check coding control method, system and terminal device
  • Low density odd-even check coding control method, system and terminal device
  • Low density odd-even check coding control method, system and terminal device

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Embodiment Construction

[0040] The decoding of LDPC is iterative decoding, so there is a maximum number of iterations. When the channel condition is good, only a few iterations can be used to decode correctly. Therefore, if the channel is in good condition and the appropriate puncturing is performed, then It can ensure the correct decoding in the decoding process lower than the maximum number of iterations, and improve the throughput of the system at the same time. The performance of LDPC with different code rates is quite different. In the case of puncturing and decoding errors, the decoding accuracy can be greatly improved by retransmitting the little data that was knocked out. The present invention fully combines the above-mentioned characteristics of LDPC, and in order to achieve higher spectrum utilization, proposes a method for adaptively performing low-density parity-check coding control according to the number of LDPC decoding iterations, which is hereinafter referred to as the LDPC-AMC method...

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Abstract

This low density odd-even check coding control method, system and terminal device are used to solve how to raise the system throughput in the existed self-adapting control mode based on the low density odd-even check coding. This technique scheme considers fully that the decoding of LDPC is an iterative decoding, where there is a max iterative number. When the channel situation is good, only a few iterative number is enough to do decoding well. Thus some properly punching on the good channel can still keep the correct decoding with the iterative number less than the max value. Thus system throughput and frequency spectrum utilization are raised. This scheme considers that the LDPC feature of different code ratio is much different. Under the situation of punching and wrong decoding, the decoding correctness can be raised via retransmission of a few punched out data.

Description

technical field [0001] The present invention relates to data communication technology, in particular to a low density parity check coding control method, system and terminal equipment. Background technique [0002] With the rapid development of mobile communication technology, the requirements for system spectrum utilization are getting higher and higher, which requires the system to achieve the highest possible spectrum efficiency within limited frequency resources. AMC (Adaptive Modulation Coding, Adaptive Coding and Modulation) technology can adjust the coding rate and modulation mode of the system according to the situation of the fading channel, so that when the channel condition is good, high-order modulation and high-rate coding mode can be used to obtain high In the case of poor channel conditions, low-order modulation and low-rate coding are used to ensure communication quality. The adaptability of the technology greatly improves the capacity and spectrum utilizati...

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Application Information

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IPC IPC(8): H04L1/18H04L25/03
Inventor 李立华周明宇温娜路唯佳刘翔张平吴和兵王吉滨
Owner HUAWEI TECH CO LTD
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