Low-bit-rate biorthogonal code decoder and decoding method

A bi-orthogonal code and decoder technology, applied in the field of channel coding and decoding, can solve problems such as the complexity of the decoding method of bi-orthogonal-Turbo codes, and achieve the effect of reducing complexity and being easy to apply

Active Publication Date: 2022-02-25
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

However, the decoding method of biorthogonal-Turbo codes is relatively complicated in engineering technology implemen

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  • Low-bit-rate biorthogonal code decoder and decoding method
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  • Low-bit-rate biorthogonal code decoder and decoding method

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[0123]In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. Obviously, the described embodiments are part of the embodiments of the present invention , but not all examples. 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.

[0124] Combine below Figure 1-Figure 2 The low code rate bi-orthogonal code decoder and decoding method of the present invention are described.

[0125] figure 1 It is a schematic structural diagram of a low code rate bi-orthogonal code decoder provided by the present invention; as figure 1 As shown, the low code rate bi-orthogonal code decoder includes:

[0126] A two-branch decoder, eac...

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Abstract

The invention provides a low-code-rate biorthogonal code decoder and a decoding method. The decoder comprises two branch decoders; each branch decoder comprises an extrinsic information and prior information storage unit, a backward metric calculation and storage unit and a forward metric and posterior information calculation unit; the extrinsic information and prior information storage unit is used for determining prior information based on posterior information and stored extrinsic information; the backward metric calculation and storage unit is used for performing backward recursion estimation based on a signal to be decoded and the prior information and outputting a backward metric value; the forward metric and posterior information calculation unit is used for performing forward recursive estimation based on the signal to be decoded, the prior information and the backward metric value, and outputting a forward metric value and posterior information; if the number of times of forward recursion estimation reaches the preset maximum number of iterations, a decoding result is outputted; the complexity of the structure and the implementation mode of the biorthogonal code decoder is reduced, and the low-bit-rate biorthogonal code decoder is easy to apply in engineering.

Description

technical field [0001] The invention relates to the technical field of channel coding and decoding, in particular to a low code rate bi-orthogonal code decoder and a decoding method. Background technique [0002] Channel coding technology ensures the reliability of communication transmission by adding redundant information. As a code set with good autocorrelation and zero cross-correlation, bi-orthogonal codes can be directly used in the transmitter to generate acquisition and synchronization sequences, which can greatly simplify the structure of the transmitter and reduce the complexity of implementation. Bi-orthogonal-Turbo codes combine the low bit-rate characteristics of bi-orthogonal codes with the high coding gain of Turbo codes, and are well applied in low-bit-rate communication scenarios. However, the decoding method of biorthogonal-Turbo codes is relatively complex in engineering technology implementation, and a low-complexity decoding method of biorthogonal-Turbo ...

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Application Information

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IPC IPC(8): H03M13/29
CPCH03M13/29H03M13/296
Inventor 董新虎张家豪苗夏箐王帅闵紫薇
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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