An Effective Nonlinear Phase Compensation Method for FMCW Terahertz Radar

被引：11

作者：

Jiang, Yanwen ^{[1
]}

Deng, Bin ^{[1
]}

Wang, Hongqiang ^{[1
]}

Qin, Yuliang ^{[1
]}

Liu, Kang ^{[1
]}

机构：

[1] Natl Univ Def Technol, Coll Elect Sci & Engn, Changsha 410073, Hunan, Peoples R China

来源：

IEEE PHOTONICS TECHNOLOGY LETTERS | 2016年 / 28卷 / 15期

基金：

中国国家自然科学基金;

关键词：

Frequency modulated continuous wave; nonlinear phase compensation; phase discontinuity; range profile; terahertz radar; AUTOFOCUS;

D O I：

10.1109/LPT.2016.2558462

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：

The nonlinearity of signal usually leads to the range profile blurring and defocusing in the terahertz (THz) radar ranging, which should be compensated to achieve a well-focused range profile. In this letter, an effective nonlinear phase compensation method is proposed to compensate for the signal distortion caused by the radar waveform nonlinearities. It comprises two processing steps, namely, coarse phase compensation and precise phase compensation, which are based on the time-frequency distribution and the phase gradient autofocus algorithm, respectively. The proposed method is a nonparametric method and can eliminate the errors caused by phase discontinuity of the dechirped frequency-modulated continuous-wave (FMCW) signal. Furthermore, the compensation method can be used in the processing of multi-period real data that are obtained from the FMCW THz radar.

引用

页码：1684 / 1687

页数：4

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