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Interleaver of TURBO coder in WCDMA system

A wideband code division multiple access and interleaver technology, which is applied to the field of interleaver in TURBO coding in physical channel coding of wideband code division multiple access system, can solve the problem of large resources, and achieve the effect of reducing resources and reducing hardware resources

Inactive Publication Date: 2007-09-26
SANECHIPS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0068] It can be seen from the principle of the TRUBO interleaver that the key to this algorithm is S sequence calculation and intra-row exchange, which contains two multiplication and modulus circuits. If the multiplication circuit or division circuit is directly used, the resources consumed by hardware implementation will be very large

Method used

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  • Interleaver of TURBO coder in WCDMA system
  • Interleaver of TURBO coder in WCDMA system
  • Interleaver of TURBO coder in WCDMA system

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Embodiment Construction

[0109] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0110] As shown in FIG. 2 , the interleaver of this embodiment includes a prime number and original root value storage unit, an interleaving parameter calculation unit, an S sequence calculation unit, an Ri sequence calculation unit, an address generation unit, and the like. in:

[0111] The prime number and the original root value storage unit are used to store p in the above-mentioned prime number and the original root value table and their corresponding v in order from small to large, and also have an address counter to read out the data therein sequentially and output to Parameter calculation module and Ri sequence calculation unit.

[0112] The parameter calculation module is used to calculate the corresponding prime number P, the number of rows R and the number of columns C of the input matrix, and the original root value V according to the size...

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Abstract

A interlacing device in TURBO coder of wide band code division multiple access system includes: prime number and primitive root value storing unit which is used to store p and corresponding v and output sequentially; complecting parameter calculating unit which is used to calculate the corresponding prime number P, number of lines of input matrix R, number of columns C and primitive root value V and output them; S sequence calculating unit which is used to calculate S sequence that is the basic sequence permuted in line according to V and P and stored; Ri sequence calculating unit is used to store value that the prime number qi is molded to (P-1) which is contained in the prime sequence Q; address generating unit which is used to ensure the output sequence of line address and column address according to the value of complecting parameter and S sequence, R sequence, obtain the absolute position of the address in input sequence and output. Said units adopt the adder to realize multiplication calculation, adopt circle comparing subtracter to realize the mod circuit, the hardware resource needed by calculation is decreased.

Description

technical field [0001] The present invention relates to an interleaver, more specifically, relates to an interleaver in TURBO coding in wideband code division multiple access (WCDMA) system physical channel coding. Background technique [0002] Turbo encoder principle [0003] The Turbo coding scheme adopts the parallel convolutional code (PCCC), which has two 8-state sub-coders and a Turbo code internal interleaver. The coding rate of Turbo code is 1 / 3. The Turbo coding structure is shown in Figure 1. [0004] The transfer function for an 8-state subcode for a parallel convolutional code (PCCC) is: [0005] G ( D ) = [ 1 , g 1 ( D ) g 0 ( D ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J13/00H04B1/707H04L1/00H03M13/00
Inventor 杜凡平
Owner SANECHIPS TECH CO LTD