User Collaborated Reception of Spatially Multiplexed Signals: An Experimental Study in Group Mobility

Ilmiawan SHUBHI  Yuji HAYASHI  Hidekazu MURATA  

Publication
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E100-A   No.1   pp.227-231
Publication Date: 2017/01/01
Online ISSN: 1745-1337
DOI: 10.1587/transfun.E100.A.227
Type of Manuscript: Special Section LETTER (Special Section on Wideband Systems)
Category: 
Keyword: 
collaborative interference cancellation,  field experiments,  MU-MIMO,  spatial multiplexing,  

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Summary: 
In multi user multiple input multiple output systems, spatial precoding is typically employed as an interference cancellation technique. This technique, however, requires accurate channel state information at the transmitter and limits the mobility of the mobile station (MS). Instead of spatial precoding, this letter implements collaborative interference cancellation (CIC) for interference suppression. In CIC, neighboring MSs share their received signals without decoding and equivalently increase the number of received antennas. The performance is evaluated through a field experiment using a vehicle that is equipped with seven MSs and moves around an urban area.