Performance Analysis of Some Modulation Techniques of Ultra Wide Band Signals

Abstract

The great interest in UWB communications was sparked by FCC rulings in February 2002 that authorized the unlicensed commercial deployment of UWB technology under a strict power control in 7500 MHz of spectrum. This fast-emerging technology uses extremely narrow and low-power RF pulses to transmit and receive information. Using the short-duration pulses as the basic building blocks of communication systems gives exceptionally attractive features as well as unique technical challenge. The objective of this research is to study and analyze the performance of M-PAM and M-PPM UWB signals. The thesis presents a comprehensive background of the UWB technology. Short-pulse generation, UWB antennas, UWB modulation and multiple-access techniques, as well as UWB applications and a comparative analysis of UWB, narrowband, and spread-spectrum wideband communication systems are discussed. The methodology of this work is based on simulation of symbol error probability using MATLAB programming language. The symbol error probability is plotted for M equal to 2, 4, and 8 as a function of Eb/No and it is found that for M-PPM signals, Performance improves as M increases, while the opposite is true for M-PAM signal