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Signal Model and Method for Joint Angle and Range Estimation of Low-Elevation Target in Meter-Wave FDA-MIMO Radar

Frequency diversity array multiple input multiple output (FDA-MIMO) communication system has the advantages of frequency diversity and waveform diversity, so it has attracted extensive attention, especially the joint estimation of angle and range. The existing researches mainly focus on incoherent signals, and conventional coherent signals, which can be solved by spatial smoothing based technologies. However, meter-wave MIMO radar, the target echo signal in low-elevation area has its uniqueness, and decoherence technologies such as spatial smoothing cannot be used. At present, the field of joint angle and range estimation of low-elevation target for meter-wave FDA-MIMO radar is still a gap. This letter focuses on deriving the signal model and proposes a generalized MUSIC algorithm to fill this gap. Simulation results show the effectiveness of the algorithm.