Decoding method, device and application of wireless channel

A wireless channel and wireless signal technology, applied in the field of channel encoding and decoding, can solve the problems affecting the receiving performance of the system, and achieve the effect of improving decoding performance, excellent decoding performance, and meeting actual communication needs.

Inactive Publication Date: 2007-12-12
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This makes the characteristics of LDPC codes not fully explored and utilized, and there is still a certain decoding error rate, which affects the receiving performance of the system.

Method used

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  • Decoding method, device and application of wireless channel
  • Decoding method, device and application of wireless channel
  • Decoding method, device and application of wireless channel

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0172] Referring to the functional block diagram of the first embodiment of the system of the present invention shown in Figure 9:

[0173] In this embodiment, the outer code encoder in the encoding device of the present invention uses a BCH encoder S41, and the outer code decoder in the decoding device uses a BCH error correction hard decoding algorithm, including a hard decision device S42 and an error correction method BCH decoder S43. Wherein, the hard decision device S42 can be a simple threshold decision, that is, if the data input to the decision device is greater than 0, the decision device outputs 0, otherwise the decision device outputs 1.

[0174] The signal sending end encodes the signal source through the BCH encoder S41 and the LDPC encoder S12, and then modulates it into the corresponding channel for transmission;

[0175] After receiving the signal, the signal receiving end demodulates the signal. Then, at first, the LDPC decoder S22 decodes the demodulated s...

no. 3 example

[0180] Referring to the functional block diagram of the third embodiment of the system of the present invention shown in Figure 11:

[0181] In this embodiment, the outer code encoder in the encoding device of the present invention uses the BCH encoder S41, and the outer code decoder in the decoding device uses the BCH soft decoding algorithm, including the BCH soft decoder S61.

[0182] The signal sending end encodes the signal source through the BCH encoder S41 and the LDPC encoder S12, and then modulates it into the corresponding channel for transmission;

[0183] After receiving the signal, the signal receiving end demodulates the signal. Then, at first, the LDPC decoder S22 decodes the demodulated signal in SPA mode, and then the BCH soft decoder S61 performs BCH decoding on the symbols decoded by the LDPC decoder S22, and the decoded The signal is transmitted to the sink.

no. 4 example

[0184] Referring to the schematic block diagram of the fourth embodiment of the system of the present invention shown in Figure 12:

[0185] Same as the above-mentioned embodiment shown in FIG. 11 , in this embodiment, the outer code decoder in the decoding device of the present invention still uses the BCH soft decoding algorithm, but it is necessary to perform multiple operations on the output information of the BCH soft decoder S61. iterations to further improve the decoding performance.

[0186] The signal sending end encodes the signal source through the BCH encoder S41 and the LDPC encoder S12, and then modulates it into the corresponding channel for transmission;

[0187] After receiving the signal, the signal receiving end demodulates the signal. Then, at first, the LDPC decoder S22 decodes the demodulated signal in SPA mode, and then the BCH soft decoder S61 performs BCH decoding on the symbols decoded by the LDPC decoder S22, and the BCH soft decoder The soft outpu...

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Abstract

The invention discloses a decoding method of wireless channel and application for it, when decoding for wireless signal, according to the output characteristics of low density parity check code LDPC decoding chooses the external code; when sending wireless signal, first codes for the signal via said external code, and then codes the signal via LDPC coding; when receiving wireless signal, first decodes it via LDPC, and the decodes according to external code. The invention also discloses a decoding device for wireless channel and the application for it, the system in invention includes: coding device and decoding device. Using the invention, it can improve the preciseness of decoding for wireless channel effectively.

Description

technical field [0001] The invention relates to channel coding and decoding technology, in particular to a wireless channel decoding method, device and application thereof. Background technique [0002] Channel coding technology can improve the error caused by noise and interference during the transmission of digital information, and improve system reliability. Therefore, providing efficient channel coding and decoding technology has become one of the key technologies in the mobile communication system. The diversity and flexibility of the business types provided by the mobile communication system put forward higher requirements for error control coding and decoding. [0003] Traditional channel coding schemes mainly include BCH (Bose-Chaudhuri-Hocquenghem) codes and Turbo codes. Recently, LDPC (Low Density Parity Check Codes, Low Density Parity Check Codes) codes have been proposed, which are used in the fourth-generation mobile communication systems. Channel coding metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L25/03H03M13/00H03M13/11
Inventor 武雨春
Owner HUAWEI TECH CO LTD
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