TY - GEN
T1 - A Photonic-Based Self-Interference Cancellation Approach for Continuous-Wave Radar Systems
AU - Han, Moxuan
AU - Liu, Qingbo
AU - Jiang, Lizhong
AU - Huang, Yong
AU - Shi, Taixia
AU - Chen, Yang
N1 - Publisher Copyright:
© 2021 SISE.
PY - 2021
Y1 - 2021
N2 - A photonic-based self-interference cancellation (SIC) method for the continuous-wave radar is proposed based on a dual-polarization quadrature phase-shift keying (DP-QPSK) modulator. The upper dual-parallel Mach-Zehnder modulator (DP-MZM) in the DP-QPSK modulator is biased as a carrier-suppressed single-sideband (CS-SSB) modulator to modulate the received signal, which includes both the useful echo signal reflected by the target and the self-interference signal from the transmitting antenna. The lower DP-MZM in the DP-QPSK modulator is also biased as a CS-SSB modulator, where the reference signal is modulated after amplitude and delay adjustments. After the two optical signals are coupled in a polarizer, the reference signal and the self-interference signal cancel each other in the optical domain. By properly controlling the carrier suppression of the upper modulator, the coupled optical signal consists of one first-order optical sideband and an optical carrier, so the useful echo signal without self-interference can be recovered by photodetection. Simulation results show that the proposed SIC system can effectively suppress the self-interference signal. System parameters that affect the SIC are further verified and studied by simulation.
AB - A photonic-based self-interference cancellation (SIC) method for the continuous-wave radar is proposed based on a dual-polarization quadrature phase-shift keying (DP-QPSK) modulator. The upper dual-parallel Mach-Zehnder modulator (DP-MZM) in the DP-QPSK modulator is biased as a carrier-suppressed single-sideband (CS-SSB) modulator to modulate the received signal, which includes both the useful echo signal reflected by the target and the self-interference signal from the transmitting antenna. The lower DP-MZM in the DP-QPSK modulator is also biased as a CS-SSB modulator, where the reference signal is modulated after amplitude and delay adjustments. After the two optical signals are coupled in a polarizer, the reference signal and the self-interference signal cancel each other in the optical domain. By properly controlling the carrier suppression of the upper modulator, the coupled optical signal consists of one first-order optical sideband and an optical carrier, so the useful echo signal without self-interference can be recovered by photodetection. Simulation results show that the proposed SIC system can effectively suppress the self-interference signal. System parameters that affect the SIC are further verified and studied by simulation.
KW - Microwave photonics
KW - continuous-wave radar
KW - self-interference cancellation
UR - https://www.scopus.com/pages/publications/85124336417
U2 - 10.23919/CISS51089.2021.9652265
DO - 10.23919/CISS51089.2021.9652265
M3 - 会议稿件
AN - SCOPUS:85124336417
T3 - CISS 2021 - 2nd China International SAR Symposium
BT - CISS 2021 - 2nd China International SAR Symposium
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2nd China International SAR Symposium, CISS 2021
Y2 - 3 November 2021 through 5 November 2021
ER -