Antenna Effects Consideration for Space-Time Coding UWB-Impulse Radio System in IEEE 802.15 Multipath Channel

In our previous work (Y.F. Ruan, 2005), we investigated how the temporal and spatial diversity influence the multiple access performance and how the space-time coding technique is used to mitigate the multiple access interference (MAI) and the inter-symbol interference (ISI) thereby improving the bit error rate (BER) performance of the ultra wideband (UWB) impulse radio (IR) system, where the antenna effects is not involved among the performance evaluation process. Whereas in this paper, an ultra-wideband dielectric resonator antenna (DRA) proposed in Y.X. Guo et al. (2005) is used for transmitting and receiving short pulses which occupy ultra-wide bandwidth. Numerical results show that the DRA is a good candidate for transmitting and receiving short pulses and the space-time coding technique is an efficient mean to improve the performance of ultra wideband impulse radio system under IEEE 802.15 multipath environment