An Efficient Directional Modulation Transmitter With Novel Crest Factor Reduction Technique

被引：13

作者：

Chen, Long ^{[1
]}

Chen, Wenhua ^{[1
]}

Liu, Youjiang ^{[2
]}

Yang, Chun ^{[2
]}

Feng, Zhenghe ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Elect Engn, Beijing 100084, Peoples R China

[2] China Acad Engn Phys, Inst Elect Engn, Mianyang 621900, Sichuan, Peoples R China

来源：

IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS | 2019年 / 29卷 / 08期

关键词：

Crest factor reduction (CFR); digital predistortion (DPD); directional modulation (DM);

D O I：

10.1109/LMWC.2019.2923361

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：

Directional modulation (DM) is a physical layer security technology based on the multiantenna structure. Similar to traditional transmitters, the DM transmitter is also faced with the problem of high peak-to-average power ratio (PAPR) and nonlinear distortion. The existing peak clipping methods for crest factor reduction (CFR) are not suitable for the DM transmitter. This letter proposes a two-step peak clipping (TPC) scheme to specifically decrease the DMsignals' PAPRs and presents a highly efficient DM transmitter with digital predistortion (DPD). Using a 16-QAM 20-MHz bandwidth signal, the PAPR of signals is reduced from 8.5 to 5.0 dB and the drain efficiency (DE) is improved from 26.6% to 45.9%. The corresponding error vector magnitude (EVM) and adjacent channel power ratio (ACPR) are -50.3 dBc and 1.86% after the DPD linearization.

引用

页码：554 / 556

页数：3

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