Title :
Analysis of IPDL patterns for increased signal detection probability in UMTS
Author :
Thomas, N.J. ; Cruickshank, D. G M ; Laurenson, D.I.
Author_Institution :
Dept. of Electron. & Electr. Eng., Edinburgh Univ., UK
Abstract :
To support mobile location services in UMTS systems, idle period downlink (IPDL) techniques have been proposed to avoid the near-far effect in CDMA systems and thus to facilitate the measurement of time difference of arrivals. In this paper the effects of the idle period pattern and variable coherent and non-coherent integration lengths on the detection of signals from distant base stations are evaluated theoretically under some simplifying assumptions and by simulation. The proposed clustered idle period patterns are assessed and shown to outperform regular patterns in certain conditions
Keywords :
Rayleigh channels; Rician channels; cellular radio; code division multiple access; mobile radio; probability; signal detection; 3G mobile communication; CDMA; IPDL patterns; Rayleigh fading; Rician fading; UMTS; clustered idle period patterns; coherent integration lengths; distant base stations; idle period downlink techniques; mobile location services; near-far effect; noncoherent integration lengths; signal detection probability; simulation; 3G mobile communication; Downlink; Interference; Multiaccess communication; Pattern analysis; Signal analysis; Signal detection; Time difference of arrival; Time measurement; Timing;
Conference_Titel :
Vehicular Technology Conference, 2001. VTC 2001 Spring. IEEE VTS 53rd
Conference_Location :
Rhodes
Print_ISBN :
0-7803-6728-6
DOI :
10.1109/VETECS.2001.944092
