Threshold-based piecewise companding transform for PAPR reduction in OFDM systems

被引：0
|
作者：
LIU Shu-hua [1 ]
LI Yong-zhao [1 ]
ZHANG Hai-lin [1 ]
LIU Ying-ting [2 ]
机构：
[1] Sate Key Laboratory of Integrated Service Network 119
[2] Information and Communication Company of Gansu Electric Power Corporation
来源：
The Journal of China Universities of Posts and Telecommunications | 2013年 / 02期
基金：
中国国家自然科学基金; 中央高校基本科研业务费专项资金资助;
关键词：
OFDM; PAPR; companding transform; iterative detection;
D O I：
暂无
中图分类号：
TN919.3 [数据传输技术];
学科分类号：
0810 ; 081001 ;
摘要：
Piecewise companding transform is a flexible and efficient way to solve the high peak-to-average power ratio (PAPR) problem for orthogonal frequency division multiplexing (OFDM) systems. A novel threshold-based piecewise companding transform is proposed in this paper. Based on the statistical characteristics of amplitudes, OFDM signals are classified into three groups (i.e., small, average and large signals). Different from conventional approaches, two dedicated designed thresholds are set to amplify the small signals and compress the large signals, respectively. Simulation results verify the improvement in PAPR reduction of the proposed scheme. Moreover, a lower bit error rate (BER) performance loss can be obtained by introducing the iterative detection with a moderate increase in complexity.
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页码：1 / 6 +18
页数：7
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