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| Research on Multi-Target Signal Generation Based on Microwave Photonic Technology |
| YANG Li1， CHEN Hongwei2， LIU Shifeng1， PAN Shilong1 |
| 1. National Key Laboratory of Microwave Photonics， Nanjing University of Aeronautics and Astronautics， Nanjing 211106， Jiangsu， China； 2. Shanghai Electro-Mechanical Engineering Institute， Shanghai 201109， China |
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Abstract To address the issues of large computational data volume, long processing time and difficulty in handling high-frequency broadband target signals in conventional electrical-domain hardware-in-the-loop (HIL) multi-target simulation systems, this paper proposes a high-frequency broadband multi-target signal generation method based on microwave photonic technology. In this method, high-frequency broadband target echo signals are modulated onto optical carriers through electro-optic modulators, target signal replication is achieved using active fiber loops, different delay values are introduced through optical switch switching in the fiber loops, and tunable Doppler frequency shifts are applied to the replicated target signals using acousto-optic modulators. Consequently, this method possesses the characteristics of delay switching and tunable Doppler frequency shift while generating high-frequency broadband multi-target signals. By leveraging microwave photonic technology to realize high-frequency broadband multi-target signal generation, the use of high-speed digital-to-analog converters (DACs) and digital storage delay devices can be avoided, thereby effectively solving the problems of large computational data volume and long processing time existing in conventional electrical-domain HIL simulation systems. Simulation results in this paper verify the feasibility of the proposed high-frequency broadband multi-target signal generation method, as well as its characteristics of delay switching and tunable Doppler frequency shift.
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Received: 12 November 2025
Published: 06 May 2026
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2026, Vol. 9 
