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Woven convolutional code error detection and correction coder, encoder in TD-SCDMA system

A technology of TD-SCDMA and error correction coding, which is applied in the field of wireless communication, can solve the problem that the coding method is not suitable for application, etc., and achieve the effects of reducing equipment complexity, reducing decoding delay, and good performance

Inactive Publication Date: 2006-02-22
SHENZHEN TINNO WIRELESS TECH
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Problems solved by technology

[0004] The Woven (woven) convolutional code first proposed by Steven Hst and others uses a series of parallel encoders to replace the inner and outer encoders of ordinary concatenated codes, and "weaves" the convolutional code together in a special form similar to fabric , so as to achieve the effect of interleaving, but there is currently no suitable application for this encoding method

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  • Woven convolutional code error detection and correction coder, encoder in TD-SCDMA system
  • Woven convolutional code error detection and correction coder, encoder in TD-SCDMA system
  • Woven convolutional code error detection and correction coder, encoder in TD-SCDMA system

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[0021] The implementation of the present invention will be described below in conjunction with the accompanying drawings.

[0022] figure 1 Shown is a simple TD-SCDMA system downlink diagram, the data stream received from the MAC layer is sent to the channel coding part after the CRC check, and the channel coded data stream is respectively interleaved, rate matched, modulated, spread Frequency and scrambling, superimposed with other users' data to form a frame to send, the data stream received by the receiving end from the channel is demodulated, deinterleaved, and rate decomposed after channel estimation, joint detection, and physical channel desegmentation Matching, etc., and then perform channel decoding together with the channel information, and the decoding output is subjected to CRC de-checking. The invention adopts a Woven convolutional code error correction encoder as a channel encoding part and a Woven convolutional code error correction decoder as a channel decoding...

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Abstract

The invention relates to the channel error-correcting coding technique which can protect the Woven convolution code error-corrector in the TD-CDMA system. The invention replaces the Turbo code in present channel coding with the Woven convolution code error-corrector and encoder which uses a series of encoders to replace the internal and external encoders of step-connected code. The Woven convolution code uses two steps of coding structure, while the iterated decoding structure is used for decoding. Since the simple convolution component code and the paralleling decoding structure are used in the invention, the time delay of decoding and the operational complexity are reduced markedly. So the Woven convolution code more fits the high-speed high-real time service to improve the property of system compared to the Turbo code.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to the channel error correction coding technology in the TD-SCDMA system. Background technique [0002] The TD-SCDMA system standard suggests that Turbo codes be used as the coding method of channel coding in 64k, 144k, and 384k links. The Turbo code uses a soft output iterative decoding algorithm, which makes full use of the soft information output by decoding, and also uses a recursive systematic convolutional code (RSC) divided by a pseudo-random interleaver as a component code. In addition to resisting channel burst errors, the interleaver In addition, the weight distribution of the code is also changed, which makes the Turbo code have excellent error correction ability. [0003] Although Turbo codes have great advantages in resisting bit errors, their disadvantages are also obvious. Due to its complex interleaver and iterative structure, it has the disadvantages of large...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H03M13/23H03M13/27
Inventor 谢显中于浩
Owner SHENZHEN TINNO WIRELESS TECH
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