Performance analysis and optimization of OFDM receiver with blanking nonlinearity in impulsive noise environment

被引：140

作者：

Zhidkov, SV ^{[1
]}

机构：

[1] Samsung Elect Co Ltd, Syst Chip Res Ctr, Giheung 449711, South Korea

来源：

IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY | 2006年 / 55卷 / 01期

关键词：

blanking nonlinearity; impulsive noise; multicarrier modulation; orthogonal frequency division multiplexing (OFDM);

D O I：

10.1109/TVT.2005.858191

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：

A simple method of improving orthogonal frequency division multiplexing (OFDM) receiver performance in an impulsive noise environment is to precede a conventional OFDM demodulator with blanking nonlinearity. This method is widely used in practice since it is efficient and very simple to implement. However, performance analysis of this scheme has not yet appeared. In this paper, we study performance of the OFDM receiver with blanking nonlinearity in the presence of impulsive noise. Closed form analytical expressions for the signal-to-noise ratio (SNR) at the output of blanking nonlinearity and the optimal blanking threshold that maximizes SNR are derived. Simulation results are provided that show good agreement with theory if the number of OFDM subcarriers is sufficiently large.

引用

页码：234 / 242

页数：9

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