Performance analysis of OFDM based UWB systems enhanced with frequency-domain spreading

被引：0
|
作者：
Kunnari, Esa [1 ]
Iinatti, Jari [1 ]
机构：
[1] Univ Oulu, Ctr Wireless Commun, FI-90014 Oulu, Finland
来源：
2007 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS, VOLS 1-14 | 2007年
关键词：
D O I：
10.1109/ICC.2007.804
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：
In this paper, a performance analysis of orthogonal frequency-division multiplexing (OFDM). based ultra-wideband (UWB) systems with frequency-domain spreading is presented. A continuum of schemes from a plain nonspread OFDM scheme to a maximally spread multicode scheme via medium-spread combinations of the variable spreading factor (VSF) and multicode transmissions is considered. The channel is assumed to be Rayleigh fading with exponentially decaying delay power profile. Furthermore, the analysis takes into account the intersymbol interference (ISI) caused by the multipath delay components exceeding the guard interval. Numerical results demonstrate that frequency-domain spreading can improve the performance remarkably when sufficient spreading factors and a suitable combining method is used.
引用
收藏
页码：4873 / 4878
页数：6
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