QPSK coding

2011 12 1
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  • hello i m working on implementing a QPSK coded system with hamming(7,4) without using actual coding function, but the G and H matrix i choose doesnt give me G*H'=0, the proff said the matrix are ok, u need to change the mod of the matrix, i dont get it, can anyone explain me this mod thing,,
the G matrix i choose is
[1 0 0 0 1 1 0
0 1 0 0 0 1 1
0 0 1 0 1 1 1
0 0 0 1 1 0 1]
and the H matrix is
[1 0 1 1 1 0 0
1 1 1 0 0 1 0
0 1 1 1 0 0 1]
please anyone help me that where i m wrong

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回答（1 个）

Walter Roberson
Walter Roberson 2011-12-1

0 个投票

Please refer to http://www.mathworks.com/matlabcentral/answers/16990-galois-field-to-find-the-inverse-of-a-binary-matrix which will not give you the direct answer but should give you the background in to changing the "mod".

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