Error Analysis of DS-BPSK UWB Systems in the Presence of Multiple-Access Interference

An analysis of an asynchronous DS-BPSK UWB system is presented. The standard UWB channel (proposed by IEEE 802.15.3a task group) rather than AWGN or any other kinds of multipath fading channels by Bo Hu (2004) is employed in the analysis to reflect the actual channel conditions. We adopt the standard Gaussian approximation in the analysis because of its facilities in analyzing the complicated multipath fading channel which comprises many random variables. The result of this analysis reveals that in certain channel conditions, the bit error probability of such systems is influenced by several key parameters which include the period of the pseudo-random code, the mean of the squared value of the pulse´s normalized autocorrelation function, and the expected sum of the squared value of discrete aperiodic cross-correlation function between every two different signature sequences. The impacts of the above key parameters are revealed by both analysis and numerical examples