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Channel Characteristics and Performance of MIMO E-SDM Systems in an Indoor Time-Varying Fading Environment

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Title: Channel Characteristics and Performance of MIMO E-SDM Systems in an Indoor Time-Varying Fading Environment
Authors: Bui, Huu Phu Browse this author
Nishimoto, Hiroshi Browse this author
Ogawa, Yasutaka Browse this author
Nishimura, Toshihiko Browse this author
Ohgane, Takeo Browse this author
Issue Date: 2010
Publisher: Hindawi Publishing
Journal Title: EURASIP Journal on Wireless Communications and Networking
Start Page: 736962
Publisher DOI: 10.1155/2010/736962
Abstract: Multiple-input multiple-output (MIMO) systems employ advanced signal processing techniques. However, the performance is affected by propagation environments and antenna characteristics. The main contributions of the paper are to investigate Doppler spectrum based on measured data in a typical meeting room and to evaluate the performance of MIMO systems based on an eigenbeam-space division multiplexing (E-SDM) technique in an indoor time-varying fading environment, which has various distributions of scatterers, line-of-sight wave existence, and mutual coupling effect among antennas. We confirm that due to the mutual coupling among antennas, patterns of antenna elements are changed and different from an omnidirectional one of a single antenna. Results based on the measured channel data in our measurement campaigns show that received power, channel autocorrelation, and Doppler spectrum are dependent not only on the direction of terminal motion but also on the antenna configuration. Even in the obstructed-line-of-sight environment, observed Doppler spectrum is quite different from the theoretical U-shaped Jakes one. In addition, it has been also shown that a channel change during the time interval between the transmit weight matrix determination and the actual data transmission can degrade the performance of MIMO E-SDM systems.
Type: article
Appears in Collections:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 西村 寿彦


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