Title :
An analysis of the 3-stage search process in W-CDMA
Author :
Sriram, Sundararajan ; Hosur, Srinath
Author_Institution :
DSPS R&D Center, Texas Instrum. Inc., Dallas, TX, USA
Abstract :
This paper considers the PN acquisition and search mechanism in the wideband CDMA standard proposed by the 3rd Generation Partnership Project (3GPP) committee. In the 3GPP system, no synchronization requirement is assumed between base-stations (BS). In this case, since neighboring BS use different spreading sequences, the mobile must first determine the spreading sequence being used by the base station(s) from which the mobile receives sufficiently strong signals. To facilitate acquisition, the total set of spreading sequences is divided into groups, and the group identification is transmitted over a synchronization channel. The mobile must then execute a three-stage algorithm for acquisition and cell search. We describe this algorithm and present an analysis of the three-stage search process. We also show that the analytical results are consistent with simulation results
Keywords :
Rayleigh channels; broadband networks; cellular radio; code division multiple access; multiuser channels; pseudonoise codes; radio networks; search problems; spread spectrum communication; synchronisation; 3-stage search process; 3GPP system; 3rd Generation Partnership Project; FDD mode; PN acquisition; PN search mechanism; Rayleigh fading channel; W-CDMA; base-stations; cell search; false lock probability; frequency division duplex mode; group identification; mean acquisition time; simulation results; spreading sequences; synchronization channel; synchronization channel structure; wideband CDMA standard; Algorithm design and analysis; Analytical models; Base stations; Digital signal processing; Frequency synchronization; Multiaccess communication; Proposals; Research and development; Timing; Wideband;
Conference_Titel :
Vehicular Technology Conference, 2000. IEEE-VTS Fall VTC 2000. 52nd
Conference_Location :
Boston, MA
Print_ISBN :
0-7803-6507-0
DOI :
10.1109/VETECF.2000.886809