MOBILE RADIO PROPAGATION CHANNEL CHARACTERISATION AND ITS PERFORMANCE ANALYSIS

Mobile signals propagate from base station to mobile station through space. The worst case communication channel is usually in the urban and semi-urban environments where there are many obstacles. Due to obstacles, the transmitted signal arrives at the receiver from various directions over a multiplicity of paths. Received signal strength decreases and sometimes unable to recognise. So modelling and characterisation of channel is must and highly important. Using Rayleigh distribution function characterization of attenuation and phase of a channel is done. The received signal strength in terms of power is measured using RF recorder for analysis at the mobile station at certain time intervals and the signal (in dBm) assumed to be received under homogeneous multipath conditions. In this paper the real time data is analyzed by computing its histogram (approximation of its probability distribution function, pdf) and its sample cumulative distribution function (CDF), and then verified whether the measured data fits a Rayleigh distribution using chi-square test.