The Solution of Multipath Fading Problem at Receiver in Underwater Acoustic Channel using Frequency Spectrum

The aim of the paper is to mitigate the effects of multipath fading at the receiver in underwater acoustic communication channel. Our approach leverages the frequency spectrum analysis of the composite received signal to identify the most reliable information-bearing frequency. By examining the magnitudes of frequencies present in the received signal, which may consist of multiple signals with varying degrees of orthogonality, we develop a technique to select a specific frequency as the true bit. This selection process is based on comparing the magnitudes of the frequencies within a given time interval. By choosing the frequency with either the highest or the lowest magnitude, we provide a solution that offers a probability of 1/2 for receiving accurate information.