Variation Approach-Based Nonlinear Companding Scheme for PAPR Reduction in OFDM Systems

被引:4
|
作者
Xing, Zhitong [1 ]
Li, Yun [2 ]
Rajasekaran, Aditya S. [3 ,4 ]
Peng, Deyi [1 ]
Yanikomeroglu, Halim [3 ]
机构
[1] Chongqing Univ Posts & Telecommun, Sch Commun & Informat Engn, Chongqing Key Lab Mobile Commun Technol, Chongqing 400065, Peoples R China
[2] Chongqing Univ Posts & Telecommun, Sch Software Engn & Sch Commun & Informat Engn, Chongqing 400065, Peoples R China
[3] Carleton Univ, Dept Syst & Comp Engn, Ottawa, ON K1S 5B6, Canada
[4] Ericsson Canada Inc, BNEW DNEW BB LP Lower Prod C, Ottawa, ON K2K 2V6, Canada
基金
加拿大自然科学与工程研究理事会; 中国国家自然科学基金;
关键词
OFDM; Peak to average power ratio; Probability density function; Transforms; Nonlinear distortion; Optimization; Time-domain analysis; PAPR; companding; distortion; AVERAGE POWER RATIO; REDUCING PAPR; TRANSFORM; SIGNALS; DESIGN;
D O I
10.1109/TBC.2022.3194362
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
Orthogonal frequency division multiplexing (OFDM) continues to find vast deployment in current and next generation wireless communication systems. However, high peak-to-average power ratio (PAPR) is one of the major drawbacks in the OFDM system. In this paper, we develop a variation approach based nonlinear companding (VANC) scheme to reduce the PAPR in OFDM systems. It aims to find the probability density function (PDF) for OFDM signal amplitudes with low PAPR and low distortion compared with their original Rayleigh distribution. The target PDF is found by solving a variation optimization problem model, which is built to find the lowest PDF distortion with both average signal power and probability conservation constraint. To the best of our knowledge, it is the first time that the variation method is used to find companding function to address the high PAPR problem. We then propose an algorithm with companding operation based on quantized levels. Simulation results validate the performance superiorities of the proposed scheme to that of other typical companding schemes.
引用
收藏
页码:916 / 926
页数:11
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