Results on spectrum sharing between a radar and a communications system

The increasing demand for wireless ubiquitous services necessitates new spectrum allotments or a re-design of current systems to effectively manage coexistence between different types of technologies. In particular, the S-band (2-4 GHz) is in high demand for both surveillance and weather radar, communication satellites and commercial wireless networks. In the US there is strong political pressure for portions of radar spectrum to be shared with commercial wireless services. In order to effectively design coexistence strategiesit is crucial to understand how current radar and communications systems would affect each other if they were to coexist. As a starting point, this paper investigates a simple setup where one radar coexists with one communications system and considers the effect each has on the other as their relative distance is varied. Despite its simplicity, this model qualitatively validates known experimental results on the effect of communications systems on radars, and thus could be a useful tool to design coexistence schemes for future networks.