High-energy-efficiency high-speed parallel LDPC encoding method and encoder

Abstract

The invention discloses a high-energy-efficiency high-speed parallel LDPC encoding method and encoder, and the encoding method comprises the steps: dividing an input serial or parallel information sequence into multiple segments according to the size of a quasi-cyclic LDPC code cyclic shift sub-matrix, and converting the serial or parallel information sequence into a full parallel data mode; performing cyclic shift on the segmented information sequence; selecting information bits at corresponding positions according to the positions of non-zero elements in the first column of the cyclic shift sub-matrix; combining the information bits after the multiple sections of selection; carrying out modulo-two accumulation on the combined information bits by adopting a pipeline processing mode to obtain corresponding check bits; converting the serial check bits into a full parallel data mode; and outputting a coding result. According to the positions of the non-zero elements in the generated matrix, bit selection is firstly performed on the information sequence, and then coding calculation is performed, so the operation of invalid information bits can be effectively avoided, the operand required by coding calculation is reduced, and the overall hardware resource consumption of the encoder is remarkably reduced.

Description

technical field [0001] The invention relates to the technical fields of satellite ultra-high-speed information transmission and channel coding, in particular to an energy-efficient high-speed parallel LDPC coding method and a coder. Background technique [0002] With the rapid development of technologies such as space-based information ports, satellite Internet, and distributed constellations, the demand for inter-satellite and satellite-to-ground data transmission has risen sharply. The direct contradiction between limited space communication load resources and high-speed and large-capacity communication requirements has become increasingly prominent. How to carry out research on high-performance signal processing theory and implementation technology under the premise of strict constraints on platform resources, volume, and power consumption has important application value . [0003] Low-density parity-check (LDPC, low density parity check) codes have error correction capa...

AI Technical Summary

Problems solved by technology

However, the serial SRAA encoder has a large processing delay and low throughput, and is not suitable for high-speed design; the register used by the parallel SRAA encoder is too large, consumes a lot of resources, and its application is limited

Zhang Zhongming et al. proposed an improvement on the problem of large frame delay in the parallel SRAA structure. Encoding can be performed without completely collecting a frame of data. However, the encoder is limited by the integer factorization of the size of the LDPC code quasi-circular matrix. When When the order is a prime number, this method cannot be used for encoding

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