Gunnery, S.Pardhasaradhi, B.Prashantha Kumar, H.Srihari, P.2026-02-0620212021 12th International Conference on Computing Communication and Networking Technologies, ICCCNT 2021, 2021, Vol., , p. -https://doi.org/10.1109/ICCCNT51525.2021.9580023https://idr.nitk.ac.in/handle/123456789/30225This paper presents target estimation performance improvement in cooperative radar and communication system spectrum sharing system model. Due to cooperation, target returns results from the communication transmitter are also exploited to improve the target estimation performance. Further, Cramer-Rao Lower Bound (CRLB) is considered as a metric to evaluate the target estimation performance. In addition, the effect of transmitting energy and target reflection coefficient on CRLB is analyzed. The cooperative system model is compared with the non-cooperative radar and communication system spectrum sharing operation and stand-alone radar system operation. Results show that the cooperative radar and communication system spectrum sharing system model provides improved performance compared to non-cooperative and stand-alone operations. © 2021 IEEE.communication systemcooperativeCRLBnon-cooperativeradar systemspectrum sharing