Title :
Adaptive threshold settings in code phase acquisition for the double dwell architecture
Author :
Vejlgaard, Benny N. ; Mogensen, Preben ; Knudsen, Jasper Bailum
Author_Institution :
Bosch Telecom Denmark, Pandrup, Denmark
Abstract :
An algorithm for code phase acquisition in direct-sequence spread-spectrum systems is presented and analyzed. The algorithm is a window based double dwell searcher. The algorithm with a moderate window size has shorter acquisition than the immediate verification algorithm has-especially at low SNR. The first-dwell uses a robust method based on a rank filter while the second dwell uses known threshold hypothesis. The code phase acquisition algorithm is compared with both single and double threshold hypothesis algorithms
Keywords :
IIR filters; code division multiple access; filtering theory; mobile radio; pseudonoise codes; radio receivers; spread spectrum communication; synchronisation; CDMA; DS-SS communication; IIR filter; RAKE receiver; adaptive threshold settings; code phase acquisition; direct-sequence spread-spectrum systems; double dwell architecture; double threshold hypothesis algorithms; rank filter; single threshold hypothesis algorithms; window based double dwell searcher; Algorithm design and analysis; Base stations; Communication industry; Costs; Delay; Electronic mail; Fading; Multipath channels; Telecommunications; Testing;
Conference_Titel :
Vehicular Technology Conference Proceedings, 2000. VTC 2000-Spring Tokyo. 2000 IEEE 51st
Conference_Location :
Tokyo
Print_ISBN :
0-7803-5718-3
DOI :
10.1109/VETECS.2000.851458
