Optimum receiver design for wireless broad-band systems using OFDM - Part I

被引:532
作者
Speth, M [1 ]
Fechtel, SA
Fock, G
Meyr, H
机构
[1] Aachen Univ Technol, Inst Integrated Syst Signal Proc, D-52056 Aachen, Germany
[2] Infineon Technol AG Gr, D-81541 Munich, Germany
关键词
OFDM; receiver design; synchronization;
D O I
10.1109/26.803501
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
Orthogonal frequency-division multiplexing (OFDM) is the technique of choice in digital broad-band applications that must cope with highly dispersive transmission media at low receiver implementation cost. In this paper, we focus on the inner OFDM receiver and its functions necessary to demodulate the received signal and deliver soft information to the outer receiver for decoding, In Part I of this paper, the effects of relevant nonideal transmission conditions are thoroughly analyzed: imperfect channel estimation, symbol frame offset, carrier and sampling clock frequency offset, time-selective fading, and critical analog components. Through an appropriate optimization criterion (signal-to-noise ratio loss), minimum requirements on each receiver synchronization function are systematically derived, An equivalent signal model encompassing the effects of all relevant imperfections is then formulated in a generalized framework. Part I concludes with an outline of synchronization strategies to be detailed in Part II.
引用
收藏
页码:1668 / 1677
页数:10
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