Title :
A Novel ZF-Based Fast Beamforming Method for Short-Range MIMO Transmission
Author :
Sakamoto, Kazumitsu ; Arai, Maki ; Hiraga, Ken ; Seki, Tomohiro ; Tsubaki, Toshimitsu ; Toshinaga, Hideki ; Nakagawa, Tadao
Author_Institution :
NTT Network Innovation Labs., NTT Corp., Kanagawa, Japan
Abstract :
Millimeter-wave short-range multiple-input multiple-output (SR-MIMO) transmission employing zero-forcing beamforming (ZF-BF) at the information kiosk side can improve transmission rate without increasing mobile terminal power consumption for MIMO signal processing. However, processing delay for ZF weight generation is large, so the effects of time-varying channels due to the user´s hand jiggling, which cause performance degradation, cannot be ignored. In this letter, a novel fast beamforming method is described with which ZF-based weight can be generated with low delay by utilizing the relationship of channel variation and ZF weight variation. Simulation results show that the method can achieve better performance than ZF-BF.
Keywords :
MIMO communication; array signal processing; time-varying channels; MIMO signal processing; ZF weight variation; ZF-based fast beamforming method; channel variation; information kiosk side; mobile terminal power consumption; processing delay; short-range MIMO transmission; time-varying channels; transmission rate; zero-forcing beamforming; Array signal processing; Arrays; Delays; Interference; MIMO; Mobile communication; Signal to noise ratio; Short-range MIMO; hand jiggling; millimeter-wave band; transmit beamforming; zero-forcing;
Journal_Title :
Wireless Communications Letters, IEEE
DOI :
10.1109/LWC.2015.2459693
