Flexible correlation for cell searching in a CDMA system

Details Flexible correlation for cell searching in a CDMA system Flexible correlation for cell searching in a CDMA system

2007-09-11

2007-09-11

Fan, Chieh M. (Department: 2611)

Pulse or digital communications

Spread spectrum

Direct sequence

C375S147000, C375S343000

Reexamination Certificate

active

10249863

ABSTRACT:
Within a synchronization stage, m candidates are selected according to secondary correlation results that are generated in a standard code group and slot number identification process. Each candidate contains a respective code group number and slot number, and m is greater than 1. A primary scrambling code correlation process is performed with each candidate to obtain a corresponding primary correlation result for an associated primary scrambling code number. The primary scrambling code correlation process for each candidate is performed over x slots, where x is determined by the ratio f/m, f being the number of slots per frame, and x being less than f. Within integer constraints, x is ideally f/m. The respective code group number, slot number and primary scrambling code number of the candidate having the greatest primary correlation result are then selected as a synchronization result.

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Yi-Pin Eric Wang and Tony Ottosson, Cell Search in W-CDMA, IEEE Journal on Selected Areas in Communications, Aug. 2000, pp. 1470-1182, vol. 18, No. 8.

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