On companding techniques to mitigate PAPR in SC-FDMA systems

被引:0
|
作者
Ramtej K.S. [1 ]
Anuradha S. [1 ]
机构
[1] Department of Electronics and Communication Engineering, National Institute of Technology, Warangal
关键词
Average power; Ber; Bit error rate; Ccdf; Companding; Complementary cumulative distribution function; Papr; Peak to average power ratio; Sc-fdma;
D O I
10.1504/IJWMC.2020.106778
中图分类号
学科分类号
摘要
Single Carrier Frequency Division Multiple Access (SC-FDMA) is being used successfully in the uplink communications of Long Term Evolution (LTE) standard. Owing to smaller envelope changes in SC-FDMA signal, it has a lower Peak to Average Power Ratio (PAPR) than Orthogonal Frequency Division Multiple Access (OFDMA) signal. But for higher order modulations, PAPR is still high and there is a requirement to mitigate PAPR in localised SC-FDMA systems. This paper discusses error function, exponential, rooting and logarithmic companding techniques that can be utilised to mitigate PAPR in SC-FDMA systems. Simulation results show that exponential companding technique provides better PAPR and Bit Error Rate (BER) performances at the cost of higher side lobes, and error function companding transform provides good PAPR and Power Spectral Density (PSD) performances at the cost of higher BER without increasing average signal power. © 2020 Inderscience Enterprises Ltd.. All rights reserved.
引用
收藏
页码:295 / 302
页数:7
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