IEICE Transactions on Communications
Online ISSN : 1745-1345
Print ISSN : 0916-8516
Special Section on Antenna and Propagation Technologies Contributing to Realization of Next Generation Wireless Systems
Multi-Beam Massive MIMO Using Constant Modulus Algorithm for QAM Signals Employing Amplitude and Phase Offset Compensation
Ryotaro TANIGUCHIKentaro NISHIMORIHideo MAKINO
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2017 Volume E100.B Issue 2 Pages 262-268

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Abstract

Massive MIMO transmission, whose number of antennas is much larger than the number of user terminals, has been attracted much attention as one of key technologies in next-generation mobile communication system because it enables improvement in service area and interference mitigation by simple signal processing. Multi-beam massive MIMO has proposed that utilizes the beam selection with high power in analog part and blind algorithm such as constant modulus algorithm (CMA) which does not need channel state information (CSI) is applied in digital part. Proposed configuration obtains high transmission efficiency. We have evaluated QPSK signals because the CMA basically focuses on the constant amplitude modulation. In this paper, in order to achieve the further higher transmission rate, the amplitude and phase compensation scheme is proposed when using the CMA with amplitude and phase modulation scheme such as QAM. The effectiveness of proposed method is verified by the computer simulation.

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© 2017 The Institute of Electronics, Information and Communication Engineers
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