Investigating the Impact of Doppler Shift Performance of Multipath Rayleigh Fading Channel

In wireless communication, the signal has been conveyed by numerous indistinct observable fact, inherent to the formation of the wireless channel. Amid these one of the key causes is multipath fading which degrades the performance of the wireless channel. Multipath fading includes various factors such as scattering effect in multipath, dispersion of time and doppler shift that arises from the comparative motion between transmitter and receiver. In this paper simulation of Quadrature Amplitude Modulation (QAM) has been done over a multipath Rayleigh fading channel and observations has been made based on different values of Doppler shift.