Liu, FanGarcía Rodríguez, AdriánMasouros, ChristosGeraci, Giovanni2020-03-312019Liu F, Garcia-Rodriguez A, Masouros C, Geraci G. Interfering channel estimation in radar-cellular coexistence: how much information do we need?. IEEE Trans Wireless Commun. 2019 Sep 9;18(9):4238-53. DOI: 10.1109/TWC.2019.29215561536-1276http://hdl.handle.net/10230/44129In this paper, we focus on the coexistence between a MIMO radar and cellular base stations. We study the interfering channel estimation, where the radar is operated in the “search and track” mode, and the BS receives the interference from the radar. Unlike the conventional methods where the radar and the cellular systems fully cooperate with each other, in this paper, we consider that they are uncoordinated and the BS needs to acquire the interfering channel state information (ICSI) by exploiting the radar probing waveforms. For completeness, both the line-of-sight (LoS) and Non-LoS (NLoS) channels are considered in the coexistence scenario. By further assuming that the BS has limited a priori knowledge about the radar waveforms, we propose several hypothesis testing methods to identify the working mode of the radar, and then obtain the ICSI through a variety of channel estimation schemes. Based on the statistical theory, we analyze the theoretical performance of both the hypothesis testing and the channel estimation methods. Finally, the simulation results verify the effectiveness of our theoretical analysis and demonstrate that the BS can effectively estimate the interfering channel even with the limited information from the radar.application/pdfeng© 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. http://dx.doi.org/10.1109/TWC.2019.2921556info:eu-repo/semantics/articlehttp://dx.doi.org/10.1109/TWC.2019.2921556Radar-communication coexistenceChannel estimationHypothesis testingSearch and trackinfo:eu-repo/semantics/openAccess