Distributed Detection of MIMO Spatial Multiplexed Signals in Terminal Collaborated Reception

Fengning DU  Hidekazu MURATA  Mampei KASAI  Toshiro NAKAHIRA  Koichi ISHIHARA  Motoharu SASAKI  Takatsune MORIYAMA  

IEICE TRANSACTIONS on Communications   Vol.E104-B    No.7    pp.884-892
Publication Date: 2021/07/01
Publicized: 2020/12/29
Online ISSN: 1745-1345
DOI: 10.1587/transcom.2020EBP3108
Type of Manuscript: PAPER
Category: Wireless Communication Technologies
multi-user MIMO,  transmission experiment,  interference cancellation,  terminal collaboration,  collaborative reception,  measurement campaign,  

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Distributed detection techniques of multiple-input multiple-output (MIMO) spatially multiplexed signals are studied in this paper. This system considered employs multiple mobile stations (MSs) to receive signals from a base station, and then share their received signal waveforms with collaborating MSs. In order to reduce the amount of traffic over the collaborating wireless links, distributed detection techniques are proposed, in which multiple MSs are in charge of detection by making use of both the shared signal waveforms and its own received waveform. Selection combining schemes of detected bit sequences are studied to finalize the decisions. Residual error coefficients in iterative MIMO equalization and detection are utilized in this selection. The error-ratio performance is elucidated not only by computer simulations, but also by offline processing using experimental signals recorded in a measurement campaign.