Photonic Generation of Dual-Chirp Waveforms With Improved Time-Bandwidth Product

被引：65

作者：

Xu, Yuxiao ^{[1
]}

Jin, Tao ^{[1
]}

Chi, Hao ^{[1
]}

Zheng, Shilie ^{[1
]}

Jin, Xiaofeng ^{[1
]}

Zhang, Xianmin ^{[1
]}

机构：

[1] Zhejiang Univ, Coll Informat Sci & Elect Engn, Hangzhou 310027, Peoples R China

来源：

IEEE PHOTONICS TECHNOLOGY LETTERS | 2017年 / 29卷 / 15期

基金：

中国国家自然科学基金;

关键词：

Dual chirp; microwave photonics; radar signal generation; analog optical signal processing; MICROWAVE; SIGNALS;

D O I：

10.1109/LPT.2017.2712192

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：

We present a photonic method for the generation of dual-chirp signals. In this approach, a single-tone RF signal is first modulated using a modulator in order to generate two optical carriers, which are further modulated by a linearly chirped signal by another modulator. Square-law detection in a photodiode then generates a dual-chirp signal whose center frequency and time-bandwidth product (TBWP) are fourfold increased. The dual-chirping and the improved TBWP can improve the range resolution of the radar system and help avoid the range measurement error caused by the range-Doppler coupling effect. The generation of bandwidth-quadrupled S-band dual-chirp waveforms is demonstrated experimentally. The processing of the dual-chirp signal is also discussed, in order to show its advantages over single-chirp signals. We believe that the proposed approach is a potential solution for the generation of dual-chirp signals with high center frequency and large bandwidth in modern radar systems.

引用

页码：1253 / 1256

页数：4

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