UWB coexistence with IEEE 802.11a and UMTS in modified Saleh-Valenzuela channel

Ultra wideband (UWB) system performance is studied in the presence of multiband interference. The interference sources considered are IEEE 802.11a and UMTS which are operating simultaneously with their maximum system bandwidths. The channel model used in the study is a modified Saleh-Valenzuela model which is adopted to be used as a reference UWB channel by the IEEE 802.15.3a study group. All the interference signals are equally powered at the UWB receiver input. The system under interest is a single band and single user UWB link operating at a data rate of 100 Mbps without error correction coding. UWB pulse waveforms are the 5^th and the 6^th derivatives of a Gaussian pulse to meet the FCC regulations. Both coherent and non-coherent UWB receiver algorithms are used. The former gives a best performance due to its capability to utilize the maximum available energy at the detection process when maximum ratio combining is utilized. The results show that the UWB system is sensitive to RF interference coming from the same frequency band.