Low-precision large-scale antenna system based on probabilistic shaping and coding modulation method thereof

Abstract

The invention relates to a low-precision large-scale antenna system based on probabilistic shaping and a coding modulation method thereof. In the low-precision large-scale antenna system, a sending end performs probabilistic shaping coding, channel coding and constellation mapping on information bits, and a receiving end performs low-precision quantization processing, probabilistic shaping detection, channel decoding and reverse probabilistic shaping on received signals, so that the information bits are detected. The coding modulation design method comprises the following steps: analyzing theinfluence of low-precision quantization on transmission constellation diagram energy distribution of the low-precision large-scale antenna system; based on an analysis result and the channel type of the receiving end, optimizing the sending probability distribution of the sending end, and obtaining an optimal transmission sending probability; and realizing coding modulation design based on the optimal transmission sending probability. Compared with the prior art, the low-precision large-scale antenna system based on the probabilistic shaping and the coding modulation method thereof provided bythe invention have the advantages of reducing the capacity loss caused by the quantification and the like.

Description

technical field [0001] The invention relates to the technical field of antenna coding and modulation, in particular to a low-precision quantization large-scale antenna system based on probability shaping and a coding and modulation design method based on the system. Background technique [0002] In the past 20 years, the contradiction between the explosive growth of wireless communication traffic and the shortage of electromagnetic spectrum has driven the innovation of wireless theory and technology, and successively produced code division multiple access, orthogonal frequency division multiple access, non-orthogonal multiple access, multi- Iconic signal design concepts such as antenna, full-duplex, high frequency, and large bandwidth have promoted the standardization and industrialization of wireless communication technologies with higher system capacity. [0003] Among these technologies, the large-scale antenna system is considered to be one of the most potential transmis...

AI Technical Summary

Problems solved by technology

[0008] 1) Theoretical capacity problem: low-precision ADC performs finite-bit level quantization on the received signal at the receiving end. This kind of nonlinear signal processing will introduce additive nonlinear random noise, so that the transition probability of the signal is no longer Has dominant Gaussian mathematical features

However, the existing coding and modulation schemes have not been designed for specific quantized channels, and have not jointly designed the characteristics of channel error correction codes with the signal set of optimal input distribution.

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