Title :
Interference Suppression in Non-coherent Time-Hopping IR-UWB Ranging
Author :
Sahinoglu, Z. ; Guvenc, I. ; Orlik, P. ; Molisch, A.F.
Author_Institution :
Mitsubishi Electr. Res. Lab., Cambridge, MA
Abstract :
Ranging requires detection of the first arriving signal component. The accuracy of time-of-arrival-based range estimation is greatly degraded in the presence of multi-user interference (MUI). We develop a method that applies a nonlinear filter on received signal energy to suppress multiuser interference. Then, leading signal path is tracked via an iterative searchback algorithm. The method is tested on time-hopping impulse radio ultrawideband systems. Simulations conducted over IEEE 802.15.4a residential line of sight ultrawideband multipath channels indicate that range detection accuracy is significantly improved by the proposed non-linear filtering approach
Keywords :
filtering theory; interference suppression; iterative methods; multipath channels; multiuser detection; nonlinear filters; radio networks; time-of-arrival estimation; ultra wideband communication; IEEE 802.15.4a; MUI suppression; impulse radio; iterative searchback algorithm; multipath channel; multiuser interference; nonlinear filtering; signal detection; time-hopping IR-UWB ranging; time-of-arrival-estimation; ultrawideband system; Degradation; Detectors; Interference suppression; Iterative algorithms; Matched filters; Nonlinear filters; Sampling methods; Signal processing; Time of arrival estimation; Ultra wideband technology; Ultrawideband; impulse radio; multi-user interference; ranging; time of arrival;
Conference_Titel :
Ultra-Wideband, The 2006 IEEE 2006 International Conference on
Conference_Location :
Waltham, MA
Print_ISBN :
1-4244-0101-1
Electronic_ISBN :
1-4244-0102-X
DOI :
10.1109/ICU.2006.281601
