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Electronics 2019, 8(1), 79; https://doi.org/10.3390/electronics8010079

LOS-Based Equal Gain Transmission and Combining in General Frequency-Selective Ricean Massive MIMO Channels

1,2
,
1
and
1,*
1
School of Information Science and Technology, Dalian Maritime University, Dalian 116026, China
2
State Key Laboratory of Integrated Services Networks, Xidian University, Xi’an 710071, China
*
Author to whom correspondence should be addressed.
Received: 13 December 2018 / Revised: 6 January 2019 / Accepted: 7 January 2019 / Published: 10 January 2019
(This article belongs to the Special Issue Massive MIMO Systems)
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Abstract

In general frequency-selective Ricean fading environments with doubly-ended spatial correlation, this paper investigates the spectral efficiency of a broadband massive multiple-input multiple-output (MIMO) system. In particular, in order to reduce overhead of channel estimation effectively, it proposes a scheme of equal gain transmission and combining, which is only based on line- of-sight (LOS) component and has low hardware complexity. With the scheme, several interesting transmit power scaling properties without and with spatial correlation are derived when the number of antennas at the transmitter or the number of antennas at the receiver grows in an unlimited way. Furthermore, the asymptotical rate analysis is extended to the cooperative relaying scenarios with decode-and-forward and amplify-and-forward protocols, respectively, and then two novel power scaling laws are given. View Full-Text
Keywords: massive MIMO; beamforming; line-of-sight; Ricean fading; frequency-selective; power scaling massive MIMO; beamforming; line-of-sight; Ricean fading; frequency-selective; power scaling
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Yan, Q.; Sun, Y.; Yue, D.-W. LOS-Based Equal Gain Transmission and Combining in General Frequency-Selective Ricean Massive MIMO Channels. Electronics 2019, 8, 79.

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