Performance Comparison Between Various UWB Signals in AWGN Channel in Presence of Multitone Interference at the GSM Downlink Band

This paper studies the performances of carrierless ultra wideband (UWB) systems in AWGN channel with the presence of narrowband multitone jamming at the GSM downlink band. System models are based on time hopping and direct sequence concepts. The systems are studied in single UWB user case, whereas the interference model consists of multiple narrowband interference sources. Performance measure is bit error rate as a function of signal-to-noise ratio. Both of the UWB concepts spread one information bit to the numerous consecutive narrow pulses. The radiated UWB pulse waveforms (i.e. the waveforms in the channel) are modeled using the 1 and the 3 derivatives of a generic Gaussian pulse. Data modulation is based on the binary baseband modulation scheme. The results showed that the UWB system based on the time hopping concept performs slightly better than corresponding direct sequence based system. Also, the pulse waveform based on the 3 derivative of Gaussian pulse leads usually better performance than the pulse based on the 1 derivative of Gaussian pulse.