Title :
Investigating the influence of the antennas on UWB system impulse response in indoor environments
Author :
Timmermann, Jens ; Porebska, Malgorzata ; Sturm, Christian ; Wiesbeck, Werner
Author_Institution :
Karlsruhe Univ., Karlsruhe
Abstract :
UWB applications will primarily be used in indoor environments due to the power constraints given by the FCC in 2002. Therefore, investigating and modeling the indoor propagation of ultra wideband signals is of great interest. It has been shown, how a narrowband ray tracing tool developed at the Institut fur Hochstfrequenztechnik und Elektronik describing indoor wave propagation can be extended to ultra wideband channels, and first simulation results describing the channel impulse response without antenna influence have already been reported. In this paper, antennas are taken into consideration by combining data of measured complex antenna patterns with the extended Ray Tracing method whereas the antennas are typical UWB antennas. The impulse response of the UWB system including antennas is called system impulse response. Since frequency dependent complex pattern information is used, the system impulse response includes the transient response of the antennas in the time domain. After determining the UWB system impulse response, the differences between channel impulse response and system impulse response are investigated. Furthermore, in both cases, a distance estimation between transmitter and receiver is performed to investigate the impact of antennas in UWB localization applications.
Keywords :
antenna radiation patterns; electromagnetic wave propagation; indoor radio; ray tracing; transient response; ultra wideband antennas; ultra wideband communication; Institut fur Hochstfrequenztechnik und Elektronik; UWB antennas; UWB system impulse response; complex antenna patterns; indoor environments; indoor wave propagation; narrowband ray tracing; transient response; ultra wideband channels; ultra wideband signals; Antenna measurements; Antennas and propagation; FCC; Frequency dependence; Indoor environments; Narrowband; Power system modeling; Ray tracing; Ultra wideband antennas; Ultra wideband technology; Antenna influence; Keywords; Ray Tracing; UWB; impulse response; indoor propagation; localization;
Conference_Titel :
Radar Conference, 2007. EuRAD 2007. European
Conference_Location :
Munich
Print_ISBN :
978-2-87487-004-0
DOI :
10.1109/EURAD.2007.4404992