基于宽带线性调频信号的微波光子多目标多维参数测量

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中图分类号： TN971+.5;TN971+.1 文献标志码：A

Abstract： Current microwave photonic parameter measurement systems are predominantly based on single-tone pilot signals，suffering from issues such as susceptibility to parameter ambiguity for multiple targets and poor compatibility with broadband target detection. To address this，a microwave photonic multi-target multi-dimensional parameter measurement scheme is proposed based on broadband linear frequency modulated signal. This approach simultaneously achieves high-precision measurement of Doppler frequency shift and arrival angle，alongside high-resolution one-dimensional range imaging. Leveraging photonics’capability to process signals with large time-bandwidth products and linear frequency modulation，the system resolves broadband multi-target echoes to achieve ambiguity-free parameter estimation.It further employs the frequency-shift characteristics of acousto-optic modulators to suppress self-interference between multi-target echoes.The system achieves multi-target detection across the 7～30 GHz frequency band. Maximum DFS measurement error is 0.15Hz ， AOA absolute error does not exceed 2.73∘ ，and distance resolution is better than 0.5m . This enhances multi-target detection accuracy and eficiency，providing an innovative solution for radar detection systems.

Key words： microwave photonics; multi-target; Doppler frequency shift；angle of arrival； range imaging

0 引言

多普勒频移（DFS）与到达角（AOA）是目标速度与方位测量的关键参数，广泛用于雷达、导航及卫星通信[1-4]。（剩余10459字）