Peak-to-Average Power Ratio Reduction via Symbol Precoding in OTFS Modulation

被引：3
|
作者：
Su, Jingyi [1 ,2 ]
Liu, Shengheng [1 ,2 ]
Huang, Yongming [1 ,2 ]
Yuan, Jinhong [3 ]
机构：
[1] Southeast Univ, Sch Informat Sci & Engn, Nanjing 210096, Peoples R China
[2] Purple Mt Labs, Nanjing 211111, Peoples R China
[3] Univ New South Wales, Sch Elect Engn & Telecommunicat, Sydney, NSW 2052, Australia
来源：
2022 IEEE 95TH VEHICULAR TECHNOLOGY CONFERENCE (VTC2022-SPRING) | 2022年
基金：
中国国家自然科学基金;
关键词：
Peak-to-average power ratio (PAPR); orthogonal time frequency space (OTFS); symbol precoding; convex optimization; block coordinate descent; SCHEME;
D O I：
10.1109/VTC2022-Spring54318.2022.9860629
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 time frequency space (OTFS) has recently attracted widespread attention for it leverages frequency dispersion as a source of diversity and mathematically unifies the classical multiple-access schemes. However, as a multi-carrier modulation in nature, OTFS is susceptible to the problem of high peak-to-average power ratio (PAPR), especially when the number of symbols is large in order to obtain a high Doppler resolution at the receiver. In this work, we recast the problem of PAPR reduction as constrained optimization of the precoding matrix. To efficiently solve the underlying nonconvex maximum-norm minimization problem, we propose an iterative algorithm based on block coordinate descent. Simulation results show that the proposed method can significantly mitigate the PAPR without unduly compromising the reliability of data transmission.
引用
收藏
页数：5
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