A non-orthogonal multiple access signal detection method and device

Abstract

The invention provides a non-orthogonal multiple access signal detecting method and a non-orthogonal multiple access signal detecting device. The non-orthogonal multiple access signal detecting method is characterized in that received data is processed to acquire target data; a target modulation order is determined by a modulation order of a remote user and a modulation order of a close user, and a constellation diagram is determined by the power ratio of the remote user and the close user and the target modulation order; a target array of a quantum bit is calculated and extracted by using the target data and the constellation diagram, and a main quantum bit array and a standby quantum bit array are extracted; the target main quantum bit array and a target standby quantum bit array are extracted respectively from the main quantum bit array and the standby quantum bit array; the target main quantum array is decoded, and when the decoding is not succeeded, the target main quantum bit array is corrected by using the target standby quantum bit array, and the target bit stream of the remote user is successfully decoded by the corrected main quantum bit array, and then the close user data is determined by the received data and the target bit stream. Bit error rates are reduced, and operation complexity is low.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a non-orthogonal multiple access signal detection method and device. Background technique [0002] Non-orthogonal multiple access (NOMA) is a communication technology introduced in the 3rd Generation Partnership Project (3GPP). NOMA is a non-orthogonal multiple access technology applied in the power domain, which can effectively improve spectrum utilization and network throughput. [0003] In the NOMA system, the data of different users (e.g., far users and near users) are directly mapped to different codewords in the multi-dimensional constellation codebook, and multiple users simultaneously overlap on mutually orthogonal transmission resource blocks, thereby improving system spectrum utilization. However, while improving spectrum utilization, it also brings challenges at the receiving end. How to reduce the bit error rate at the receiving end of the NOMA system is an u...

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a non-orthogonal multiple access signal detection method and device to solve the problem of decoding multi-user codewords in the prior art with a large number of logarithmic operations. For problems with high complexity, the technical solutions are as follows:

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