Title :
Equivalent system model of ISI in a frame-differential IR-UWB receiver
Author :
Witrisal, Klaus ; Pausini, Marco
Author_Institution :
Graz Univ. of Technol., Austria
fDate :
29 Nov.-3 Dec. 2004
Abstract :
A discrete-time equivalent system model is derived for the intersymbol interference in a differential ultra wideband (UWB) impulse radio (IR) system operating in a multipath propagation environment. Data is transmitted using differential binary modulation on a frame-level (i.e., among UWB pulses), which is a variant of the well-known transmitted reference UWB schemes, proposed for higher data rates. It is shown that the UWB system is accurately modeled as a second-order discrete time Volterra system. Equations are presented to determine the coefficients of this non-linear model. The impact of noise is characterized. The proposed model can be used to develop signal processing algorithms for UWB-receivers in order to enhance the data rate or multiuser capabilities, for instance.
Keywords :
discrete time systems; intersymbol interference; modulation; multipath channels; radio receivers; random noise; signal processing; ultra wideband communication; ISI equivalent system model; UWB-receivers; data rate; differential binary modulation; differential ultra wideband impulse radio system; frame-differential IR-UWB receiver; intersymbol interference; multipath propagation environment; multiuser capabilities; second-order discrete time Volterra system; signal processing algorithms; Correlators; Energy capture; Intersymbol interference; Nonlinear equations; Pulse modulation; Random processes; Receivers; Signal processing algorithms; Transmitters; Ultra wideband technology;
Conference_Titel :
Global Telecommunications Conference, 2004. GLOBECOM '04. IEEE
Print_ISBN :
0-7803-8794-5
DOI :
10.1109/GLOCOM.2004.1379018