Waveform Design of Integrated Communication and Navigation based on Orthogonal Time Frequency Space

Abstract

The integration of communication and navigation is the development trend of future communication technology. We propose a communication and navigation integration strategy based on OTFS that can adapt to high-speed motion communication and navigation scenarios. For communication, OTFS can provide more significant performance gains in the case of high Doppler extension. In addition, OTFS has a naturally sparse channel model, which provides us with a good convenience for estimating channel parameters. We transform the channel estimation into a problem of sparse signal recovery, which is solved using the gradient projection method. Ranging accuracy and communication performance of the proposed waveform is analyzed and discussed under various conditions, includes the signal noise ratio of the surrounding environment, the transmission device’s speed, the separation between the transmitter and receiver, and the communication rate. Our simulation findings show that the integrated communication and navigation technique is reliable, particularly in high-speed motion situations.