Multiband dual- and cross-LFM waveform generation using a dual-drive Mach-Zehnder modulator

被引：9

作者：

Dhawan, Rajveer ^{[1
]}

Parihar, Reena ^{[1
]}

Choudhary, Amol ^{[1
,2
]}

机构：

[1] Indian Inst Technol IIT, Ultrafast Opt Commun & High Performance Integrated, Elect Engn, New Delhi, India

[2] Indian Inst Technol IIT, Bharti Sch Telecommun Technol & Management, New Delhi, India

来源：

OPTICS COMMUNICATIONS | 2023年 / 530卷

关键词：

Microwave photonics; Dual; cross LFM; Radar signal generation; Range resolution; Ambiguity function; LINEAR FREQUENCY-MODULATION; TIME-BANDWIDTH PRODUCT; PHOTONIC GENERATION; SIGNAL GENERATION; MICROWAVE; FIBER; LASER;

D O I：

10.1016/j.optcom.2022.129144

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Linear frequency modulation (LFM) signals are widely used in modern radar systems owing to their intrinsic pulse compression capability but are restricted due to a limited range-Doppler resolution. On the other hand, dual-or cross-LFM signals have complementary LFM waveforms at the same time instant that reduces the range-Doppler coupling and thus improving range-Doppler resolution. We propose a simple microwave-photonic-based approach to generate multiband dual-and cross-LFM waveforms using only a single dual-drive Mach-Zehnder modulator (DDMZM). A theoretical analysis is carried out, which is modeled and verified through experiments. Dual-and cross-LFM waveforms at a carrier frequency of 6 GHz and 18 GHz with a bandwidth of 2 GHz is generated by controlling the DC and RF bias of the DDMZM. The tunability of the carrier frequency from 3 GHz to 9 GHz is also verified. A range resolution of 6.3 cm for dual-and cross-LFM waveforms, is obtained with a time-bandwidth-product (TBWP) of 20,000. The proposed technique is a promising solution for dual-and cross-LFM waveform generation in two-band multipurpose radar systems.

引用

页数：10

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