Title :
1.9 GHz measurement-based analysis of diversity power versus the number of RAKE receiver tines at various system bandwidths
Author :
Martin, Gregory T. ; Faulkner, Michael
Author_Institution :
Dept. of Electr. & Electron. Eng., Victoria Univ. of Technol., Melbourne, Vic., Australia
Abstract :
Based on wide band propagation measurements in three different environments, this paper examines the relationship between the number of RAKE receiver `fingers´ or `tines´ and the proportion of the total incident time-dispersed signal power utilised in the receiver, for various system bandwidths. Wide band propagation measurement data with a resolution of 40 ns is filtered to produce channel sounding power delay profiles corresponding to system RF bandwidths of 1.25, 2.5, 5, 8, and 16 MHz. The number and power levels of all resolvable rays are found, and the aggregate power in the strongest n rays, where n ranges from 1 to 10, is calculated as a fraction of the total profile power. Results show how much received power is discarded as a result of using a limited number of tines, providing a guide for choosing the optimum number of tines for wide band systems. A simple empirical model giving the number of tines is included
Keywords :
UHF measurement; UHF radio propagation; cellular radio; delays; diversity reception; multipath channels; power measurement; radio receivers; 1.25 MHz; 1.9 GHz; 16 MHz; 2.5 MHz; 5 MHz; 8 MHz; RAKE receiver fingers; RAKE receiver tines; cellular mobile communications; channel sounding power delay profiles; diversity power; empirical model; measurement-based analysis; multipath propagation; power levels; received power; resolvable rays; system RF bandwidths; time-dispersed signal power; total profile power; wide band propagation measurements; Acoustic propagation; Bandwidth; Fading; Fingers; Multipath channels; Power measurement; Propagation delay; RAKE receivers; Signal resolution; Wideband;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 1997. Waves of the Year 2000. PIMRC '97., The 8th IEEE International Symposium on
Conference_Location :
Helsinki
Print_ISBN :
0-7803-3871-5
DOI :
10.1109/PIMRC.1997.627050
