Experimental multipath delay profile of mobile radio channels over sea at 2 GHz

This paper is presenting measurement results characterizing radio channels at 2 GHz over open sea between a mobile single-antenna ship-borne transmitter (TX) and a fixed dual-antenna terrestrial receiver (RX). Here the measurement data are analyzed in the time domain, where the major parameters being considered are power-delay profiles (PDPs), mean excess delay and RMS delay spread. We have performed two measurement campaigns, a short range (≈ 15km) and a long range (≈ 45km). Our analysis of the short-range measurement data shows that the probability density function (PDF) of mean excess delay and RMS delay spread can be characterized by using a three-term Gaussian model, while the long-range data show that the channel can be regarded as a non frequency-selective channel.