標題: Frequency-Space-Polarization on UWB MIMO Performance for Body Area Network Applications
作者: Chang, Wei-Ju
Tarng, Jenn-Hwan
Peng, Szu-Yun
電信工程研究所
Institute of Communications Engineering
關鍵字: Body area networks (BANs);multiple-input-multiple-output (MIMO);radio propagation;ultrawideband (UWB)
公開日期: 2008
摘要: This letter experimentally investigates the performance of ultrawideband (UWB) radio technologies with multiple-input-multiple-output (MIMO) antennas for body area network (BAN) applications. Effects of array spacing, antenna polarization, bandwidth and propagation on UWB-MIMO channel capacity are analyzed. The key finding here is to that in BAN the MIMO channel capacity is mainly determined by the power imbalance between subchannels compared to the sub channel correlation for both spatial array and polar array. For spatial array, the measured results show that the MIMO channel capacity is decreased when the array spacing is increased, despite the spatial correlation coefficient is decreased. This phenomenon is different from that in wide area networks (WAN) and wireless local area networks (WLAN). It is because that power difference among elements of the spatial array is significant in BAN short-range communications compared to that in WAN and WLAN. For polar array, the achievable channel capacity is lower than that of the spatial array in line-of-sight (LOS) conditions due to high cross-polarization discrimination. Furthermore, the MIMO capacity is slightly dependent on the environments due to dominance of human body effect. It is also found that the MIMO channel capacity decreased with frequency or bandwidth.
URI: http://hdl.handle.net/11536/9959
http://dx.doi.org/10.1109/LAWP.2008.2000640
ISSN: 1536-1225
DOI: 10.1109/LAWP.2008.2000640
期刊: IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
Volume: 7
起始頁: 577
結束頁: 580
顯示於類別:期刊論文


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  1. 000269791600015.pdf