An Integrated Communication and Navigation Waveform Design Based on OFDM with Index Modulation

Aiming at the challenge of anti-interference and stable operation in navigation denial scenarios, we design an integrated communication and navigation waveform for distributed swarm systems. Traditional integrated waveforms based on orthogonal frequency division multiplexing have some problems such as high peak-to-average ratio, sensitive frequency offset and weak anti-narrow-band interference ability, resulting in low robustness and reliability in denial and interference scenarios. Against this background, we propose an innovative integrated communication and navigation waveform design that combines index modulation with orthogonal frequency division multiplexing technology. This design improves the system's anti-frequency offset and anti-interference performance. Information bits are transmitted through constellation mapping on the active subcarriers and implicitly transmitted by the index combination of the active subcarriers. At the same time, navigation and positioning are achieved through the time of arrival measured by code synchronization and loop tracking. Simulation results demonstrate that the designed waveform has more advantages in frequency offset and peak-to-average ratio performance compared to traditional integrated waveforms.