Patent ID: 7039100
Filing Date: 2006-05-02
Classification: H04B

Abstract:
1. A receiver, for use in a telecommunications system in which transmissions are sent from a plurality of base stations, the receiver comprising: receiver circuitry, for detecting transmissions from base stations; a filter, for detecting a correlation between detected transmissions from base stations and a known code, the filter including a plurality of filter segments; control circuitry, for switching the filter between a first synchronization mode, in which the filter is used divided into segments, when the receiver is first detecting transmissions from a base station to achieve synchronization therewith, and a second synchronization mode, in which the filter is used undivided, when the receiver is synchronized with one base station and is detecting transmissions from an alternative base station; and means for detecting a power of a correlation between detected transmissions from base stations and a known code, wherein, in the first synchronization mode, the powers of the correlations of the filter segments are detected and added together to form an output value, and, in the second synchronization mode, the correlations of the filter segments are added together and the power of the added correlations is detected, to form an output value.