Frequency Hopping Joint Radar-Communications with Hybrid Sub-pulse Frequency and Duration

TL;DR

This paper introduces a frequency-hopping joint radar-communications system that uses both sub-pulse frequencies and durations for higher data rates, employing TFA and YOLO-based detection for robust demodulation without channel estimation.

Contribution

It proposes a novel modulation scheme combining frequency and duration for improved data rates in FH JRC systems, with a TFA and YOLO-based demodulation approach that simplifies design.

Findings

Enhanced data rates through combined frequency and duration modulation.

Robustness against Doppler shift and timing offsets demonstrated.

No channel estimation required for demodulation.

Abstract

Frequency-hopping (FH) joint radar-communications (JRC) can offer excellent security for integrated sensing and communication systems. However, existing JRC schemes mainly embed information using only the sub-pulse frequencies and hence the data rate is limited. In this paper, we propose to use both sub-pulse frequencies and durations for information modulation, leading to higher communication data rates. For information demodulation, we propose a novel scheme by using the time-frequency analysis (TFA) technique and a "you only look once" (YOLO)-based detection system. As such, our system does not require channel estimation, simplifying the transmission signal frame design. Simulation results demonstrate the effectiveness of our scheme, and show that it is robust against the Doppler shift and timing offset between the transceiver and the communication receiver.