Approximation of SNR degradation due to carrier frequency offset for OFDM in shadowed multipath channels

被引：22

作者：

Hwang, W ^{[1
]}

Kang, H ^{[1
]}

Kim, K ^{[1
]}

机构：

[1] Kwangju Inst Sci & Technol, Dept Informat & Commun, Gwangju 500712, South Korea

来源：

IEEE COMMUNICATIONS LETTERS | 2003年 / 7卷 / 12期

关键词：

carrier frequency offset; multipath channel; orthogonal frequency division multiplexing (OFDM); shadowing signal-to-noise ratio (SNR) degradation;

D O I：

10.1109/LCOMM.2003.821333

中图分类号：

TN [电子技术、通信技术];

学科分类号：

0809 ;

摘要：

We derive an approximate expression for signal-to-noise ratio (SNR) degradation of orthogonal frequency division multiplexing due to carrier frequency offset over a shadowed multipath channel, to explicitly show the effects of system and channel parameters on the degradation of the received SNR. The results show that, for small frequency offset, the SNR degradation is proportional to the square of the frequency offset-and the square of the number of subcarriers. It is also shown that, if E-s/N-0 is reasonably large, the SNR degradation becomes insensitive to E-s/N-0, which is contrary to the case of the additive white Gaussian noise channel.

引用

页码：581 / 583

页数：3

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