Signal transmission method and equipment

Abstract

An embodiment of the present application provides a signal transmission method and device, and the method includes: the first device performs sparse scrambling processing on at least one layer of symbol data to obtain a sparse scramble output signal corresponding to at least one layer of symbol data, wherein, The sparse scrambling processing of the symbol data is processed based on the sparse scrambling index information Idx, and the mapping resource of the sparse scrambling output signal corresponding to the symbol data of each layer is: part of the time-frequency resources in the time-frequency resources of the first device resource. Further, the first device sends the sparse scrambled output signal corresponding to at least one layer of the symbol data to the second device. The signal transmission method of the present application has the characteristics of sparsity and interference randomization, which improves the performance of the communication system.

Description

technical field [0001] The embodiments of the present application relate to communication technologies, and in particular, to a signal transmission method and device. Background technique [0002] In a wireless communication system, multiple access technology is usually used for addressing, wherein the multiple access technology refers to a technology for realizing communication address identification between multiple users in a cell, or between multiple users inside and outside a cell. In the research process of new generation multiple access technology, compared with orthogonal multiple access, non-orthogonal multiple access (NOMA for short) enables multiple users to simultaneously access the communication system on the same time and frequency resources. In order to obtain the capacity bound of multiple users, the spectral efficiency of the communication system is improved. [0003] Among them, the research hotspots of NOMA technology include: sparse code multiple access ...

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Problems solved by technology

[0003] Among them, the research hotspots of NOMA technology include: sparse code multiple access (Sparse code multiple access, referred to as SCMA) technology; The scheme of superimposed transmission can obtain gains in multiple dimensions (including the interference randomization introduced by the sparse feature), among which, the sparse codebook can realize multi-user detection in the code domain and obtain the shaping gain of the modulation; but the sparse codebook in SCMA technology This requires multi-layer joint design (including joint design between multiple resources in one data layer and joint design between multiple data layers), so sparse codebook design is more difficult

[0004] Further, the Soft multiplexing multiple access (SMMA) technology is proposed in the NOMA technology; the SMMA technology refers to the linear processing of data from multiple users or different data layers of a user (that is, the data of different data layers The data are multiplied by the corresponding constants), and then the soft multiplexing multiple access scheme of superimposed transmission can realize the multi-user detection in the code domain and obtain the shaping gain of the modulation at the same time; but because the mapping method in SMMA technology is continuous mapping, that is All the preset time-frequency resources that can be used for mapping different data layers are mapped with data, therefore, the interference randomization introduced by sparsity cannot be provided to improve the performance of the communication system

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