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Soft-in-soft-out (SISO) decoding device of (n, k) block codes

A soft-input, soft-output, and decoding device technology, which is applied in the field of wireless transmission, can solve problems such as difficult design of soft-input and soft-output decoding devices, and achieve the effect of reducing complexity

Inactive Publication Date: 2012-12-05
SHANGHAI SUNPLUS TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the design of soft-input and soft-output decoding devices in frequency selective channels remains a difficult challenge

Method used

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  • Soft-in-soft-out (SISO) decoding device of (n, k) block codes
  • Soft-in-soft-out (SISO) decoding device of (n, k) block codes
  • Soft-in-soft-out (SISO) decoding device of (n, k) block codes

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Embodiment Construction

[0035] In order to make the object, technical solution and advantages of the present invention clearer, the solutions of the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0036] The present invention can calculate the logarithmic likelihood ratio without sacrificing the decoding efficiency. The present invention can be applied to general linear or nonlinear block codes. Meanwhile, the present invention can be applied to general MQAM modulation without limitation. on the properties of the transmission code. In the present invention, the terrestrial digital television broadcast transmission standard (DTMB) system will be taken as an example to illustrate the structure and design method of the soft-input and soft-output internal decoder (such as NR code).

[0037] The soft-input and soft-output decoding device for (n, k) block codes of the present invention can be used for general block codes. For the conv...

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Abstract

The invention discloses a soft-in-soft-out (SISO) decoding device of (n, k) block codes, which comprises a source bit generator, a channel coder, a transmission signal mapper, a correlator and a log-likelihood ratio generator, wherein the source bit generator is used for generating k numbered source bits; the channel coder is used for coding according to the numbered K source bits to generate channel codes of n numbered bits; the transmission signal mapper is used for mapping the channel codes of the n numbered bits into m numbered locally generated symbol sequences; the correlator is used for computing the correlation of one symbol in the symbol sequences according to a symbol sequence of wireless transmission, a channel state information sequence and the locally generated symbol sequences; and the log-likelihood ratio generator is connected to the source bit generator and the correlator and is used for generating the log-likelihood ratio of the symbol. The device disclosed by the invention can be used for lowering the complexity of the hardware architecture of the SISO decoding device, and can compute the log-likelihood ratio on the premise that the decoding efficiency is not invalidated.

Description

technical field [0001] The invention relates to the technical field of wireless transmission, in particular to a soft-input and soft-output decoding device for (n, k) block codes. Background technique [0002] As application requirements such as high information transmission speed increase, the amount of information reproduced or transmitted per unit time on the communication channel used for information transmission also increases. Therefore, when the state of the communication channel deteriorates, more errors are more likely to occur. In wireless communication, error correction methods or error correction codes with high error correction performance in communication channels are usually used to detect and correct error bits. [0003] figure 1 is a schematic diagram of an existing wireless transmission system. Wherein, an outer encoder (Outer encoder) 110 encodes the source bit sequence. The inner encoder 120 then encodes the output sequence of the outer encoder 110 , ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M13/15H04L1/00
Inventor 曾俊杰
Owner SHANGHAI SUNPLUS TECH
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