Iterative correction and decoding of OFDM signals affected by clipping

被引：3
|
作者：
Rave, Wolfgang [1 ]
Zillmann, Peter [1 ]
Fettweis, Gerhard [1 ]
机构：
[1] Tech Univ Dresden, Vodafone Chair Mobile Commun Syst, Mommsenstr 18, D-01062 Dresden, Germany
来源：
MULTI-CARRIER SPREAD-SPECTRUM | 2006年
关键词：
D O I：
10.1007/1-4020-4437-2_48
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：
We investigate iterative receive algorithms for orthogonal frequency division multiplexing (OFDM) transmission affected by clipping at the transmit power amplifier (PA). One algorithm aims at minimizing the Euclidean distance to the received sequence, while the other reconstructs the clipping noise. Both methods significantly reduce the BER compared to simple zero forcing, even for severe clipping. The iterative clipping noise correction is also investigated with a 'soft' sequence and a Soft-Input Soft-Output (SISO) decoder with coded OFDM. The gains with a soft sequence are moderate due to burst errors, but the number of iterations can be reduced compared to a correction based on hard decisions.
引用
收藏
页码：443 / +
页数：2
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