Radar Communication Integrated Signal Technology Based on FBMC Comb Spectrum

‍ ‍Due to the advantages of high spectrum efficiency， strong anti multipath fading ability， flexible subcarrier modulation and so on， orthogonal frequency division multiplexing （OFDM） is one of the current mainstream integrated signal alternative technologies for radar communication. However， this technology has some disadvantages， such as Doppler sensitivity， strong out of band radiation， and the average peak is relatively large. In contrast， filter bank multicarrier （FBMC） has higher application value due to its low out of band radiation， high Doppler tolerance and no need for cyclic prefix （CP）. Therefore， based on the FBMC framework， this paper proposed a comb spectrum signal technology that combined high-speed wireless communication and chirp excellent ambiguity function from the perspective of subcarrier multiplexing， and further designed a preamble sequence that integrated auxiliary pilot and interference utilization， which solved the problem of virtual interference in FBMC communication channel estimation. Finally， when dealing with fast time-varying channels， this paper combined the preamble sequence and discrete comb chirp spectrum to completed high-performance radar detection and ensured the performance of high-speed wireless communication. Simulation experiments effectively verified the technical feasibility.