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Electronics 2017, 6(4), 100;

Performance Evaluation of Downlink Multi-Beam Massive MIMO with Simple Transmission Scheme at Both Base and Terminal Stations

Faculty of Engineering, Niigata University, Ikarashi 2-nocho 8050, Nishi-ku Niigata 950-2181, Japan
Faculty of Engineering, Nippon Institute of Technology, 4-1 Gakuendai, Miyashiro-machi, Minamisaitama-gun, Saitama 345-8501, Japan
Author to whom correspondence should be addressed.
Received: 1 November 2017 / Revised: 13 November 2017 / Accepted: 15 November 2017 / Published: 21 November 2017
(This article belongs to the Special Issue Smart Antennas and MIMO Communications)
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Multi-beam massive multiple-input–multiple-output (MIMO) configurations that utilize high-power beam selection in the analog parts and blind algorithms such as the constant modulus algorithm (CMA), which do not require channel state information (CSI), in the digital parts, have been proposed in the literature to improve the transmission rates and efficiency. In this paper, we evaluate the transmission performance in the downlink, with simple control at the base station (BS) and user terminal (UTs), for massive MIMO transmissions. Through computer simulations, it is shown that the analog multi-beam selection at the BS and the application of CMA at the UT with two antennas can effectively realize transmissions with high-order modulation schemes. In addition, the weight update switching by the CMA is proposed in order to obtain fast and stable performance with a realistic data size. View Full-Text
Keywords: massive MIMO; multi-beam; downlink; CMA; algorithm switching massive MIMO; multi-beam; downlink; CMA; algorithm switching

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Ogawa, S.; Nishimori, K.; Taniguchi, R.; Mitsui, T.; Hiraguri, T. Performance Evaluation of Downlink Multi-Beam Massive MIMO with Simple Transmission Scheme at Both Base and Terminal Stations. Electronics 2017, 6, 100.

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