期刊
TRANSACTIONS ON EMERGING TELECOMMUNICATIONS TECHNOLOGIES
卷 33, 期 9, 页码 -出版社
WILEY
DOI: 10.1002/ett.4566
关键词
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资金
- China NSF [61971217]
- Fundamental Research Funds for the Central Universities [NE2017103]
- National Natural Science Foundation of China [61871029]
- State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System [CEMEE2019Z0104B]
- Southeast University [K201826]
This paper proposes a low-complexity signal detector for massive MIMO systems, combining joint steepest descent and non-stationary Richardson iteration method. By introducing scaling parameters and acceleration mechanisms, the proposed algorithm improves performance and speeds up convergence. The numerical results show that the proposed joint detection approach outperforms existing iterative methods and has lower computational complexity compared to conventional MMSE detector.
Signal detection is a major challenge in massive multiple-input multiple-output (MIMO) wireless systems due to array of hundreds of antennas. Linear minimum mean square error (MMSE) enables near-optimal detection performance in massive MIMO but suffers from unbearable computational complexity due to complicated matrix inversions. To address this problem, we propose a novel low-complexity signal detector based on joint steepest descent (SD) and non-stationary Richardson (NSR) iteration method. The SD is applied to get an efficient searching direction for the following NSR method to enhance the performance. The key idea of the proposed algorithm is to utilize a combination of the scaled-diagonal initialization and the system- and iteration-dependent acceleration mechanism, so that the convergence can be significantly speeded up. An antenna- and eigenvalue-based scaling parameter is introduced for the proposed detector to further improve the error-rate performance. We also provide convergence guarantees for the proposed technique. Numerical results demonstrate that the proposed joint detection approach attains superior performance compared to existing iterative approaches and provides a lower computational complexity than the conventional MMSE detector.
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