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Performance Analysis of MIMO Schemes in Residential Home Environment via Wideband MIMO Propagation Measurement
Gia Khanh TRAN Nguyen Dung DAO Kei SAKAGUCHI Kiyomichi ARAKI Hiroshi IWAI Tsutomu SAKATA Koichi OGAWA
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2010/04/01
Online ISSN: 1745-1337
Print ISSN: 0916-8508
Type of Manuscript: PAPER
Category: Communication Theory and Signals
MIMO-OFDM, wideband MIMO channel measurement, residential home environment, throughput performance evaluation,
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This paper illustrates a large-scale MIMO propagation channel measurement in a real life environment and evaluates throughput performance of various MIMO schemes in that environment. For that purpose, 44 MIMO transceivers and a novel spatial scanner are fabricated for wideband MIMO channel measurements in the 5 GHz band. A total of more than 50,000 spatial samples in an area of 150 m2, which includes a bedroom, a Japanese room, a hallway, and the living and dining areas, are taken in a real residential home environment. Statistical properties of the propagation channel and throughput performance of various MIMO schemes are evaluated by using measured data. Propagation measurement results show large dynamic channel variations occurring in a real environment in which statistical properties of the channel, such as frequency correlation and spatial correlation are not stationary any more, and become functions of the SNR. Furthermore, evaluation of throughput shows that although MIMO schemes outperform the SISO system in most areas, open loop systems perform badly in the far areas with low SNR. Paying for the cost of CSI or partial CSI at Tx, closed loop and hybrid systems have superior performance compared to other schemes, especially in reasonable SNR areas ranging from 10 dB to 30 dB. Spatial correlation, which is common in Japanese wooden residences, is also found to be a dominant factor causing throughput degradation of the open loop MIMO schemes.