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Method and device for reducing storage resource for Turbo code decoder

A technology for storage resources and decoders, applied in the direction of error correction/detection, encoding, code conversion, etc. using convolutional codes, it can solve problems such as complex hardware implementation, inapplicability, and certain difficulties, so as to maintain data accuracy, The effect of reducing storage resources and saving storage resources

Inactive Publication Date: 2006-05-24
XUANPU INDUSTRY CO LTD
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Problems solved by technology

[0016] However, the above two non-uniform compression algorithms are logarithmic compression methods. Since the input data of the Turbo code decoder and the external information generated by the SISO decoder are all fixed-point data, it is quite complicated in hardware implementation and has certain limitations. Difficulty, so the μ-rate / A-rate non-uniform compression algorithms are not suitable for Turbo code decoders

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  • Method and device for reducing storage resource for Turbo code decoder
  • Method and device for reducing storage resource for Turbo code decoder
  • Method and device for reducing storage resource for Turbo code decoder

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Embodiment Construction

[0027] The following pass Figure 3 ~ Figure 6 A specific embodiment of the present invention is described in conjunction with the Turbo code of the WCDMA system, so as to further understand the content of the present invention.

[0028] Because the data bit width of the input signal of the WCDMA system Turbo code decoder adopted is 6 bits, and the data bit width of the external information generated by the soft input / soft output decoder (SISO decoder) is 10 bits, so the The storage unit required by the decoder is:

[0029] (5114×3+12)×6+5114×2×10=194404 bits.

[0030] Such as image 3 As shown, the specific steps of this embodiment are as follows:

[0031] Step 1: Perform non-uniform compression on the input signal of the Turbo code decoder and the external information generated by the soft input / soft output decoder to reduce the bit width of the data:

[0032] The non-uniform compression algorithm is as follows: segment the data signal that needs to be non-uniformly comp...

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Abstract

The method includes steps: comparison step determines that the input signal belongs to which segmentation function; addressing parameter database of segmentation function so as to obtain specific parameters of segmentation function; calculating segmentation function generates not equal compressed data. The equipment includes following devices: comparator in use for determining that the input signal belongs to which segmentation function; database of segmentation function in use for obtaining specific parameters through addressing step; calculation unit in use for generating not equal compressed data. The invention carries out not equal compression and expansion for the input signal of encoder for Turbo codes and external additional information. The invention saves consumption of storage resources of encoder for Turbo codes without reducing performance of Turbo decoder basically.

Description

technical field [0001] The invention relates to a method and device for saving storage resources of a Turbo code decoder, which are applied to a communication system or a wireless communication system, especially in a Code-Division Multiple Access (CDMA) system. Background technique [0002] Channel encoding and decoding technology has a relatively independent position in the entire mobile communication system, and is one of its key technologies, which determines the performance of the mobile communication system. Channel encoding and decoding are mainly to reduce the signal propagation power and solve the inevitable fading problem of the signal in the wireless propagation environment. The use of encoding and decoding technology combined with interleaving technology can reduce the bit error rate performance. Compared with the case without encoding, the traditional convolutional code can reduce the bit error rate by two orders of magnitude to 10 -3 ~10 -4 , and the Turbo co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M13/29H03M13/00H03M13/23H03M13/27H04L1/00
Inventor 单鸣
Owner XUANPU INDUSTRY CO LTD
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