WiMAX system performance in highly mobile scenarios with directional antennas

被引：0

作者：

Zaggoulos, George ^{[1
]}

Nix, Andrew ^{[1
]}

Doufexi, Angela ^{[1
]}

机构：

[1] Univ Bristol, Ctr Commun Res, Bristol, Avon, England

来源：

2007 IEEE 18TH INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS, VOLS 1-9 | 2007年

关键词：

WiMAX; directional antennas; Doppler power spectrum;

D O I：

暂无

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This paper presents a performance evaluation of a WiMAX system (802.16-2004) employing directional antennas in highly mobile applications. A WiMAX physical layer simulator is used together with an appropriate mobile channel model to perform the analysis. Results show that mobile performance is significantly improved when directional antennas are utilised at the mobile end of the link. These antennas reduce the resulting Doppler spread, Which in turn increases the channel's coherence time. In a time varying channel, irreducible errors occur as a result of an aging channel estimate. The structure of the channel estimation pilots has a strong impact on performance. Analysis reveals that results are relatively insensitive to the shape of the Power Doppler Profile, but strongly related to the value of the Doppler spread.

引用

页码：1113 / 1117

页数：5

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