On the Effect of Antennas on UWB Systems

Abstract- This paper presents the influence of antennas the on performance of UWB systems. Two systems, DSS-SS and MB-OFDM are investigated. The systems operate on the IEEE802.15.3a channel, which is modeled with a Saleh Valenzuela model. An extension of the model to include direction of arrival (DoA) is used. The antenna model is taken from a monocone UWB antenna characteristics. The impact of the imperfect antenna on the channel estimation and equalisation algorithms is presented for the four IEEE802.15.3a channel scenarios. It can be seen that to maintain a target packet error rate while assuming a realistic, non-ideal antenna, the requirements are higher in terms of power and complexity of the receiver algorithms. The new requirements are given and performance degradation is presented with the help of system simulations