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Interleaving method and interleaving device

A technology of exchanging positions and quadratic power, applied in the field of communication, can solve the problem of limited interleaving length of WiMAX Turbo codes, and achieve the effect of long interleaving length

Active Publication Date: 2010-03-03
DATANG MOBILE COMM EQUIP CO LTD
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Problems solved by technology

[0006] Existing research results show that the interleaving length that the existing technology can achieve when interleaving WiMAX Turbo codes is limited, generally no more than 2048, and the maximum is no more than 4800, so for applications with an interleaving length exceeding 4800, it cannot be used

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  • Interleaving method and interleaving device

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Embodiment Construction

[0021] Embodiments of the present invention provide an interleaving method and device.

[0022] In order to enable those skilled in the art to better understand the solution of the present invention, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings and implementation manners.

[0023] figure 1 shows the flow of the embodiment of the interleaving method of the present invention, such as figure 1 shown, including:

[0024] S101: Divide the original data into two parallel input pairs;

[0025] In subsequent steps, interleaving processing is performed on the data input in pairs here.

[0026] S102: For the input paired data, if the value of i satisfies i mod 2=0, exchange the position of the i-th paired data; i represents the sequence number of the paired input data.

[0027] This step is inner interleaving in the interleaving process.

[0028] In this step, the inner interleaving process is as fo...

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Abstract

The invention discloses an interleaving method and an interleaving device. The interleaving method comprises the following steps: dividing original data into two parallel groups to input the originaldata in pairs; for the data inputted in pairs, in case i mod 2 is equal to 0, exchange the positions of the ith paired data, wherein the i represents the sequence number of the data inputted in pairs;and for the processed data, placing the ith paired data at the position of the jth outputted paired data, wherein the i and j meet the M power permutation polynomials: i=(*f[m].j<m>)modN) in which Nis the paired number of the inputted data and is equal to S / 2, S is the interleaving length, f[m] is a preset coefficient, f1 is relatively prime to S / 2, f2 and f3 or (f2+S / 4)mod and (f3+S / 4)mod N maybe integral factors of S or multiples of integral factors of S, and the multiples are relatively prime to S. By the interleaving method, the longer interleaving length can be achieved.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to an interleaving method and device. Background technique [0002] Interleaving (Interleaving) is an error control technology in current communication systems. This technology outputs the input data bits in an order different from the input order. Although the input order is different from the output order, there is a one-to-one mapping relationship. The purpose of this is to discretize the error code, change the burst error channel into a discrete error channel, and then improve the quality of data transmission by correcting random errors. [0003] Turbo code is an encoding and decoding scheme. Existing research results show that a general Turbo code can obtain a better coded distance spectrum through interleaving, such as increasing the coded free distance, which can improve the error correction performance of the Turbo code. Interleaving technology is a key fac...

Claims

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Application Information

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IPC IPC(8): H04L1/00
Inventor 陈军孙韶辉周海军王正海
Owner DATANG MOBILE COMM EQUIP CO LTD
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