Communication Receiver Design for PSK-LFM Joint Sensing and Communication Waveform

Over the past few years, several innovations in the wireless, automation, and defence sectors have witnessed a need for jointly designing sensing and communication technologies on a single platform. This will reduce the system size and cost and solve the spectrum congestion issue. In this paper, we propose novel strategies for symbol detection at the communication receiver of an unmanned aerial vehicle (UAV) using a phase shift keying-linear frequency modulated (PSK-LFM) waveform. Radar waveform takes enormous bandwidth for better range resolution. However, processing the same waveform at the communication receiver would require high Analog-to-Digital Converter (ADC) sampling. To reduce the sampling rate, we propose two variants of the same. In one case, part of the received signal is filtered and sampled for further processing, while in the other case, the whole signal is undersampled to detect the bits. We obtain the bit error rate (BER) analytical expressions for all the cases and show that a better BER performance can be obtained even if we undersample the received signal.