Decoding method and device in sparse code multiple access system

TL;DR: In this article, a decoding method, device and equipment in a sparse code multiple access system was provided. But decoding complexity was not reduced, so that decoding efficiency was not improved, since decoding complexity can reduce when the optimal maximum likelihood detection performance is achieved.

Abstract: The embodiment of the invention provides a decoding method, device and equipment in a sparse code multiple access system. The method comprises the steps of: acquiring a to-be-decoded signal; acquiring a real number field expansion signal corresponding to the to-be-decoded signal; acquiring an expansion coefficient of a user, which corresponds to the to-be-decoded signal; according to the real number field expansion signal and the expansion coefficient, determining a linear model corresponding to the to-be-decoded signal; according to a SD (sphere decoding) algorithm, carrying out processing on the linear model to obtain an optimal lattice point; and carrying out decoding on the optimal lattice point to obtain a decoding result, and using the obtained decoding result as a decoding result of the to-be-decoded signal. By the technical scheme provided by the embodiment of the invention, when the optimal maximum likelihood detection performance is achieved, decoding complexity can be reduced, so that decoding efficiency is improved.