Title :
Timing Acquisition of Wideband PPM Systems over Multipath
Author :
Porrat, Dana ; Mitra, Urbashi
Author_Institution :
Sch. of Eng. & Comput. Sci., Hebrew Univ., Jerusalem
Abstract :
The acquisition, or synchronization, of a multipath channel profile for ultra-wideband pulse position modulation (PPM) communication systems is considered. The rate of increase of the number of paths as the bandwidth grows determines whether acquisition can occur. If the number of independent Gaussian paths increases without bound, but slower than the bandwidth, then the system cannot acquire in the limit. Acquisition is not possible on multipath channels with deterministic path amplitudes, if the number of paths diverges but not too fast. These results hold for exponential or uniform power delay profiles
Keywords :
Gaussian processes; multipath channels; pulse position modulation; synchronisation; timing; ultra wideband communication; exponential power delay profiles; independent Gaussian paths; multipath channel profile; timing acquisition; ultra-wideband pulse position modulation communication systems; uniform power delay profiles; wideband PPM systems; AWGN; Bandwidth; Channel capacity; Delay estimation; Multipath channels; Pulse modulation; Spread spectrum communication; Timing; Ultra wideband technology; Uncertainty;
Conference_Titel :
Information Theory, 2006 IEEE International Symposium on
Conference_Location :
Seattle, WA
Print_ISBN :
1-4244-0505-X
Electronic_ISBN :
1-4244-0504-1
DOI :
10.1109/ISIT.2006.262099
