Joint Detection Method for Non-orthogonal Multiple Access System Based on Linear Precoding and Serial Interference Cancellation


Jianpo Li, Qiwei Wang, Journal of Information Processing Systems Vol. 17, No. 5, pp. 933-946, Oct. 2021  

10.3745/JIPS.03.0166
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Abstract

In the non-orthogonal multiple access (NOMA) system, multiple user signals on the single carrier are superimposed in a non-orthogonal manner, which results in the interference between non-orthogonal users and noise interference in the channel. To solve this problem, an improved algorithm combining regularized zero-forcing (RZF) precoding with minimum mean square error-serial interference cancellation (MMSE-SIC) detection is proposed. The algorithm uses RZF precoding combined with successive over-relaxation (SOR) method at the base station to preprocess the source signal, which can balance the effects of non-orthogonal inter-user interference and noise interference, and generate a precoded signal suitable for transmission in the channel. At the receiver, the MMSE-SIC detection algorithm is used to further eliminate the interference in the signal for the received superimposed signal, and reduce the calculation complexity through the QR decomposition of the matrix. The simulation results show that the proposed joint detection algorithm has good applicability to eliminate the interference of non-orthogonal users, and it has low complexity and fast convergence speed. Compared with other traditional method, the improved method has lower error rate under different signal-tointerference and noise ratio (SINR).


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Cite this article
[APA Style]
Jianpo Li and Qiwei Wang (2021). Joint Detection Method for Non-orthogonal Multiple Access System Based on Linear Precoding and Serial Interference Cancellation. Journal of Information Processing Systems, 17(5), 933-946. DOI: 10.3745/JIPS.03.0166.

[IEEE Style]
J. Li and Q. Wang, "Joint Detection Method for Non-orthogonal Multiple Access System Based on Linear Precoding and Serial Interference Cancellation," Journal of Information Processing Systems, vol. 17, no. 5, pp. 933-946, 2021. DOI: 10.3745/JIPS.03.0166.

[ACM Style]
Jianpo Li and Qiwei Wang. 2021. Joint Detection Method for Non-orthogonal Multiple Access System Based on Linear Precoding and Serial Interference Cancellation. Journal of Information Processing Systems, 17, 5, (2021), 933-946. DOI: 10.3745/JIPS.03.0166.