An Improvement the Channel Characteristics Performance of Ultra-Wideband (UWB) by Controlling the Main Channel Parameters

Abstract

In some environments, channel systems are susceptible to troubles caused by obstacles such as buildings, utility, canyons, and hills, and consequently they proceed many paths to reach the destination, it can cause a decrease from data speed and an increase the errors. With a view to generate a perfect channel model in the particular environment, we should have entire knowledge and information on the characteristics of the channel, including their activity, power of signal, and specified time. In this paper, an improvement of channel characteristics performance (impulse response and channel energy), and different power types (Mean excess delay, RMS delay, and Average power delay) have been suggested and evaluated. Moreover, the main channel parameters such as sampling time and number of channels are compared to those of different delay characteristics.The results show that the peak value of sampling signals increases around ±1 unit when the number of channels increase from 100 to 200 respectively. But, the time delay as the signal reaches the steady state mode still better in case of 100 channels.Furthermore, increasing the number of channels will increase the mean excess delay around 0.4 (ns), while RMS delay not affected. Additionally, the UWB estimation results display that the average power delay profile affected by increasing the sampling time and decreases exponentially with excess delay.Therefore, the number of channels and the sampling frequency are a very important influence factor frequency in channel designing. The main goal of this paper is to make researchers in this field become more familiar with these elements influencing as well as to impart an understanding of the parameters that effect general UWB multipath channel.