Abstract
A photonics-assisted joint communication-radar system is proposed by introducing a quadrature phase-shift keying (QPSK)-sliced linearly frequency-modulated (LFM) signal. An LFM signal is carrier-suppressed singlesideband modulated onto the optical carrier in one dual-parallel Mach-Zehnder modulator (DPMZM) of a dual-polarization dual-parallel Mach-Zehnder modulator (DPol-DPMZM). The other DPMZM is biased as an IQ modulator to implement QPSK modulation on the optical carrier. The polarization orthogonal optical signals from the DPol-DPMZM are further combined and detected in a photodetector to generate the QPSK-sliced LFM signal. The QPSK-sliced LFM signal is used to realize efficient data transmission and high-performance radar functions including ranging and imaging. An experiment is performed. Radar range detection with an error of less than 4 cm, inverse synthetic aperture radar imaging with a resolution of 14.99 cm×3.25 cm, and communication with a data rate of 105.26 or 210.52 Mbit/s are successfully verified.
| Original language | English |
|---|---|
| Pages (from-to) | 4752-4760 |
| Number of pages | 9 |
| Journal | Applied Optics |
| Volume | 61 |
| Issue number | 16 |
| DOIs | |
| State | Published - 1 Jun 2022 |