Title :
A Novel Path-Loss Model for UWB Off-Body Propagation
Author :
Goulianos, Angelos A. ; Brown, TimW C. ; Stavrou, Stavros
Author_Institution :
Center for Commun. Syst. Res., Guildford
Abstract :
A novel, multi-slope dual breakpoint model for predicting path-loss in ultra-wideband (UWB) off-body communication channels, is proposed. This model is based on real-body measurements, carried out in the frequency range between 3.5GHz-6.5GHz, in an anechoic chamber. New parameters that describe this specific propagation environment are presented and evaluated. Results show that the first breakpoint point angle lies in the lit region of the transmitter and increases exponentially with distance until it rises to its threshold value. Based on this finding the near and far field areas for BAP (body to access point) channels are defined. In addition, newly estimated decay coefficients suggest severe degradation as the receiver moves in between the two critical angles. Finally, techniques for model expansion in two dimensions are discussed.
Keywords :
indoor radio; radio networks; statistical analysis; ultra wideband communication; UWB off-body propagation; anechoic chamber; frequency 3.5 GHz to 6.5 GHz; indoor sparse UWB-BAP channels; path-loss model; statistical-based multislope dual breakpoint model; ultra-wideband channels; wireless body area networks; Anechoic chambers; Antenna measurements; Body sensor networks; Communication channels; Frequency measurement; Personal communication networks; Power measurement; Predictive models; Transmitters; Ultra wideband technology;
Conference_Titel :
Vehicular Technology Conference, 2008. VTC Spring 2008. IEEE
Conference_Location :
Singapore
Print_ISBN :
978-1-4244-1644-8
Electronic_ISBN :
1550-2252
DOI :
10.1109/VETECS.2008.105