Method for constructing low-density and irregular parity checking code
A construction method and non-regular technology, which is applied in the field of construction of LDPCC (low-density parity check code), can solve the problems of affecting the coding rate, complex implementation and storage, check matrix without cyclic shift, etc.
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[0109] Adopt method of the present invention to construct a concrete irregular LDPC codeword c, concrete steps are as follows:
[0110] Step 1, construct sub-matrix P.
[0111] First, construct the initial finite field vector matrix:
[0112] Choose a finite field with an order of 233. The elements in the field are positive integers from 1 to 233. We use numbers with arrows to represent these elements. Select all the elements in this field and arrange them in a column from small to large, and get a 233×1 column matrix K:
[0113] K = 1 → 2 → 3 → · · ...
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