Performance of Mobile OFDM Systems over Time-varying Non-linearities with Memory

被引：0

作者：

Hilario Tacuri, Alexander Beremiz ^{[1
]}

Fortes, Jose Mauro ^{[1
]}

机构：

[1] Pontificia Univ Catolica Rio de Janeiro, BR-22453 Rio De Janeiro, Brazil

来源：

2014 11TH INTERNATIONAL SYMPOSIUM ON WIRELESS COMMUNICATIONS SYSTEMS (ISWCS) | 2014年

关键词：

OFDM; non-linearity; multi-path channels; performance analysis;

D O I：

暂无

中图分类号：

TP3 [计算技术、计算机技术];

学科分类号：

0812 ;

摘要：

The performance of modern communications transmitters utilizing multi-carrier modulation techniques is highly sensitive to non-linear distortions arising mainly from the high-power amplifier (HPA). The increase in symbol duration makes the system more sensitive to time-varying channels. In addition, the wideband characteristics of multi-carrier signals result in frequency-dependent distortions, typically know as memory effects. This paper presents analytical expressions that could be used to evaluate the impact of the distortions induced by time-varying non-linearities with memory on the BER performance of a multi-carrier signal such as the orthogonal frequency division multiplexing (OFDM). The time-varying non-linearity with memory is modeled by a time-varying Volterra Series. The resulting mathematical expressions are applied to an specific situation, allowing for a quantitative evaluation of the system performance degradation.

引用

页码：39 / 43

页数：5