Doppler Shift Estimation and Jamming Detection for Cellular Networks

The estimation of mobile terminal speed at base station in cellular networks helps BTS in many aspects including channel estimation, adaptive reception, anti-jamming and handover operations. In this paper, we introduce a new algorithm to estimate the channel Doppler shift seen by BTS, using the measured received signals at base station. We have improved an LCR based Doppler shift estimation algorithm by using only inherent information which are available in common receivers without any excessive hardware. An improved scheme for jamming detection based on the proposed Doppler shift estimation is proposed, as well. The performance of the proposed algorithm in a TETRA network is modeled and the simulation has shown acceptable results in a wide range of velocities and jammers.