US 2011/0239075 A1 · CHANNEL CODING, MODULATING AND MAPPING METHOD FOR HYBRID AUTOMATIC REPEAT REQUEST OF LOW DENSITY PARITY CHECK CODE

Abstract

The present invention discloses a method for channel coding and modulation mapping in HARQ of the LDPC code, comprising: performing structural LDPC encoding of an information bit sequence with a length of K input by a channel encoder, and sending a generated codeword to a HARQ buffer; rearranging codeword bits of a LDPC HARQ mother code in the HARQ buffer, and sequentially selecting codeword bits to generate a binary sequence of a HARQ packet; mapping codeword bits of the HARQ packet to a constellation, and high-order bits in encoding blocks of the HARQ packet being mapped to high reliability bits in the constellation. The present invention provides the LDPC codeword with the maximal constellation gain, so that the LDPC HARQ channel encoding has the optimal performance.

Claims10

Dependent claims

A method for channel coding and modulation mapping in hybrid automatic repeat request of a low density parity check code, comprising the following steps of:

(a) performing structural low density parity check encoding of an information bit sequence with a length of K input by a channel encoder, and sending a generated codeword to a hybrid automatic repeat request buffer;
(b) rearranging codeword bits of a low density parity check hybrid automatic repeat request mother code in the hybrid automatic repeat request buffer, and sequentially selecting codeword bits to generate a binary sequence of a hybrid automatic repeat request packet;
(c) mapping codeword bits of the hybrid automatic repeat request packet to a constellation, and the previous bits in encoding blocks of the hybrid automatic repeat request packet being mapped to high reliability bits in the constellation.

Dependencies are inferred from the claim text.

Channel coding, modulating and mapping method for hybrid automatic repeat request of low density parity check code

Life of this patent

Channel coding, modulating and mapping method for hybrid automatic repeat request of low density parity check code

Life of this patent

Abstract

Claims10