Adaptive frequency diversity using OFDM for wireless communications

被引：0
|
作者：
Geevarghese, R [1 ]
Rao, RK [1 ]
机构：
[1] Univ Western Ontario, Elborn Coll, Dept Elect & Comp Engn, London, ON N6G 1H1, Canada
来源：
CCECE 2003: CANADIAN CONFERENCE ON ELECTRICAL AND COMPUTER ENGINEERING, VOLS 1-3, PROCEEDINGS: TOWARD A CARING AND HUMANE TECHNOLOGY | 2003年
关键词：
OFDM; frequency diversity; decision combining;
D O I：
暂无
中图分类号：
TP18 [人工智能理论];
学科分类号：
081104 ; 0812 ; 0835 ; 1405 ;
摘要：
An Orthogonal Frequency Division Multiplexing (OFDM) system with adaptive frequency diversity and decision combining is presented and analyzed. The system essentially involves the transmission of duplicate data over a subset of the total number of subcarriers available to the entire OFDM system. The decisions from these subsets are optimally combined at the receiver to arrive at an overall decision about the transmitted data. The optimal combination of these subsets is based on weighting factors which are adoptively chosen based on fading estimates over each subcarrier The channel is assumed to be non selective Rayleigh with additive, white Gaussian noise (AWGN). Computer simulations are presented for a variety of systems and compared with the performances of several non-adaptive OFDM systems. It is shown that the adaptive frequency diversity with decision combining in OFDM systems can provide enhanced bit error rate performance at the cost of data throughput of the system.
引用
收藏
页码：809 / 812
页数：4
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