Photonic-Assisted Multifunctional Radar for Simultaneous Measurement of Distance, Direction and Velocity

A novel photonic-assisted multifunctional radar is proposed for simultaneous measurement of the distance, velocity, and direction of the target. In this scheme, a dual-polarization binary phase shift keying (DP-BPSK) modulator is used to implement parallel de-chirping process of the echo signals received by two distributed receiving antennas. By applying a composite signal that combines a linear frequency modulated (LFM) signal and a single-frequency microwave signal as the transmitted signal, the distance, velocity, and direction of the target under test can be derived by analyzing the spectra of the de-chirped and beat signals. Simulation experiments are performed to verify the measurement capability and performance of the proposed scheme. The simulation results show that the error of the distance, velocity and direction measurement are less than ± 6×10 ^–5 m, ± 0.1 m/s and ± 0.2°, respectively.