CHEN Min, YANG Yongqin. Iterative Interference Cancellation for Non-orthogonal Multiple Access System[J]. Chinese Journal of Electronics, 2020, 29(3): 540-546. doi: 10.1049/cje.2020.03.009
Citation: CHEN Min, YANG Yongqin. Iterative Interference Cancellation for Non-orthogonal Multiple Access System[J]. Chinese Journal of Electronics, 2020, 29(3): 540-546. doi: 10.1049/cje.2020.03.009

Iterative Interference Cancellation for Non-orthogonal Multiple Access System

doi: 10.1049/cje.2020.03.009
Funds:  This work is supported by the Scientific Research Project of Higher Education in Hainan Education Department (No.Hnky2018-1).
  • Received Date: 2019-12-09
  • Rev Recd Date: 2020-03-12
  • Publish Date: 2020-05-10
  • Non-orthogonal multiple access (NOMA) makes multiple users to overload the same wireless resources by utilizing the superposition coding principle, so that it can improve the system capacity and spectral efficiency. Various NOMA schemes are proposed, including the Power-domain NOMA (PD-NOMA). Most of them are using Successive interference cancellation (SIC) for detection, which limits the promised performance gain brought by NOMA due to the error propagation. An Iterative SIC and parallel interference cancellation (ISP) method is proposed for the PD-NOMA system. The MaxLog-MAP (MLM) algorithm (MAP is short for Maximum a posteriori) and SIC are used for performance comparison. Simulation results show that the Bit error rate (BER) performance of ISP is much better than that of SIC, and is close to that of MLM. It can perform even better than MLM at low signal to noise ratio for the user with lower power allocation. The ISP can obtain the promised performance gain brought by NOMA.
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