ATTENUATION DUE TO RAIN IN WIRELESS TECHNOLOGY

The Doppler effect due to the rainwater in hilly areas leads to an interference in the received signal. In addition to the Doppler shift created by the mechanical movement of the radar-dish, the frequency shift produced by the rainwater affects the connectivity when the received signal wavelength matches with that of the diameter of the raindrop. This shift is analyzed using transforms like Fast Fourier Transform (FFT), Short Time Fourier Transform (STFT) and Wigner-Ville Distribution (WVD). In this paper, the methods of extraction and mitigation of Doppler are explained with viable algorithms and results.