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A turbo code decoding method and device based on cyclic compression

A cyclic compression and decoding device technology, applied in the field of electronic information, can solve the problems of quantization error, BER performance loss, redundant calculation complexity, and achieve the effect of reducing capacity and solving application limitations

Active Publication Date: 2022-02-08
SOUTHWEST UNIV
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Problems solved by technology

[0006] Although the Walsh-Hadamard transform method reduces more SMC capacity, the quantization error it introduces causes a large loss in BER performance and high redundancy calculation complexity

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  • A turbo code decoding method and device based on cyclic compression
  • A turbo code decoding method and device based on cyclic compression
  • A turbo code decoding method and device based on cyclic compression

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Embodiment Construction

[0065] In order to make the purpose, technical solutions and advantages of the present invention clearer, the following technical solutions in the present invention are clearly and completely described. Obviously, the described embodiments are some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0066] like figure 1 As shown, in order to further reduce the SMC capacity while maintaining a relatively low redundancy calculation complexity, the present invention takes the Turbo code in the LTE-Advanced standard as the research object, and proposes a method for compressing the state measurement storage bit width. After the forward state metric is calculated, insert a loop compression module to compress the forward state metric, store it in the SMC of last-in...

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Abstract

The present invention provides a cyclic compression-based Turbo code decoding method and a device thereof. The method includes: compressing the information calculated from the forward state metric and storing it in a LIFO SMC; The SMC reads the compressed information, and decompresses the read compressed information to estimate the corresponding forward state metric value; the estimated forward state metric value is used to calculate the posterior probability log-likelihood ratio. calculation, and finally decoding. The present invention can significantly reduce the SMC capacity, and the Log-MAP algorithm with the optimal decoding performance has only a small loss. The hardware overhead introduced by the cyclic compression and decompression module is only simple addition, shift and comparison operations, which are easy to implement.

Description

technical field [0001] The invention relates to the technical field of electronic information, in particular to a turbo code decoding method and device based on cyclic compression. Background technique [0002] In recent years, Turbo codes have been determined by various communication standards as the channel coding codes that must be supported. In order to improve the reliability of wireless data transmission, Turbo codes are also applied in Wireless Sensor Networks (hereinafter referred to as WSNs). In many occasions, sensor node power supply energy is limited, and wireless data communication consumes up to 80% of node power consumption, and excessive power consumption will seriously shorten the life cycle of sensor nodes. In order to reduce transmission power consumption and reduce the retransmission probability of sensor nodes' data frames as much as possible, the research on low-power near-optimal turbo code decoders has attracted widespread attention. [0003] Howeve...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M13/29
CPCH03M13/2957
Inventor 詹明石亚琴肖明
Owner SOUTHWEST UNIV