Title :
Outage evaluation of ultra wideband spread spectrum system with RAKE combining in lognormal fading multipath channels
Author_Institution :
Centre for Wireless Commun., Oulu Univ., Finland
Abstract :
Ultra wideband (UWB) spread spectrum system capacity is studied. User capacity is evaluated analytically against the conditional outage criterion. The probability of outage varies depending on the multipath channel intensity profile, severity of shadowing, signal-to-interference ratio target, number of users, timing errors, and the number of fingers combined in the RAKE receiver. The sum of lognormally distributed signals is mainly modelled by a Fenton-Wilkinson approximation. Numerical results show that the outage performance is quite sensitive to the variation of several key parameters.
Keywords :
approximation theory; diversity reception; fading channels; multipath channels; probability; radio receivers; spread spectrum communication; ultra wideband communication; Fenton-Wilkinson approximation; RAKE receiver; lognormal fading multipath channel; signal-to-interference ratio; ultra wideband spread spectrum system; Delay; Fading; Fingers; Multipath channels; Random variables; Shadow mapping; Spread spectrum communication; Timing; Ultra wideband technology; Wireless communication;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2004. PIMRC 2004. 15th IEEE International Symposium on
Print_ISBN :
0-7803-8523-3
DOI :
10.1109/PIMRC.2004.1368759
