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Blind identification method for coding parameter of hamming code

A technology of encoding parameters and Hamming codes, which is applied in the field of intelligent communication and non-cooperative communication

Inactive Publication Date: 2015-02-25
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0004] At present, there is no public technology specifically for the blind recognition of Hamming coding parameters.

Method used

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  • Blind identification method for coding parameter of hamming code
  • Blind identification method for coding parameter of hamming code
  • Blind identification method for coding parameter of hamming code

Examples

Experimental program
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Embodiment Construction

[0030] Such as figure 1 shown, including the following steps:

[0031] Step 1: Initialize parameters: set code length n=0, synchronization time d=0, maximum recognition length n max . Let the outer loop control variable initialize m=3, let the inner loop control variable initialize d=0, 0≤dm -1, go to step 2.

[0032] Step 2: Let n=2 m -1 if n>n max , the loop terminates; otherwise, go to step 3.

[0033] Step 3: Assume that the dual space dimension of the Hamming code is m and the synchronization time is d, then the code length n=2 m -1, the information bit length is k=2 m -m-1. For the intercepted data with a length of L bits, remove the first d bits, and then divide the remaining (L-d) bit data according to the length of n into codewords, Represents rounding down, and each codeword is used as each row of the matrix X(m,d) to form an N×n interception matrix X(m,d), such as figure 2 As shown, C in the figure ij Represents the j-th bit of the i-th codeword.

[0...

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Abstract

The invention provides a blind identification method for a coding parameter of a hamming code. The code length of the hamming code and a code block synchronization moment are estimated by judging the dimension number of a dual space of the hamming code, and information bit lengths in codewords are obtained by the code lengths of the codewords, the weight distribution properties of dual codes are used for exhaustive searching to find dual codewords, and a check matrix is obtained according to the dual codewords. The blind identification of the coding parameter of the hamming code is realized; and furthermore, the tolerance of the blind identification to an error code is improved by setting a proper threshold.

Description

technical field [0001] The invention is applied to the field of intelligent communication and non-cooperative communication in the field of cooperative communication, and specifically relates to a method for blind identification of Hamming code coding parameters. Background technique [0002] In the field of intelligent communication, in order to obtain the optimal communication quality, it is necessary to constantly change the channel coding method in a timely manner, which cannot be synchronized through the network protocol in this communication field, and fast blind identification of the channel coding method is required; In the field of non-cooperative communication, since the receiver does not know the channel coding parameters used by the transmitter when intercepting the information, it also requires fast blind identification of the channel coding method and coding parameters. For a communication system that uses Hamming codes for channel coding, the Hamming code para...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M13/19
Inventor 甘露杨晓炜廖红舒魏平张花国
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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