Telefonaktiebolaget Lm Ericsson (publ)

Martin J Jonson

Torgny Palenius

H&aring;kan Eriksson

Kenzo Urabe

A first searcher searches a first channel (e.g., a broadcast channel), a second searcher searches a second channel (e.g., a traffic channel), and the second searcher uses information from the first searcher to search the second channel. In one aspect of the invention, the first searcher generates a delay profile for the first channel. A second searcher uses the delay profile to generate a set of taps for the second channel. In another aspect of the invention, the first searcher is configured to find a maximum correlation value (or a set of maximum correlation values). The second searcher shifts a search finger by an amount equal to the delay corresponding to the maximum correlation value(s). The second searcher can also shift a code corresponding to the second signal by an amount equal to the sum of the delay corresponding to the maximum correlation value(s) and a predetermined value.

Method and apparatus for configuring a RAKE receiver

The present invention provides a method for measuring SIR in a WCDMA system where channels are transmitted from a base station using orthogonal channelization codes and the same scrambling codes. According to exemplary embodiments of the present invention, an automatic gain controller (AGC) is implemented in the receiver. The AGC is placed prior to the RAKE receiver. By using a fairly fast AGC unit that keeps incoming power to the RAKE at a constant level, the SIR can be calculated by multiplying the despread signal with a constant. This SIR calculation aids in achieving and maintaining a steady state condition in the radio communication system. This SIR calculation can also be used to control the bit error rate performance of a mobile station.

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Malmö, Sweden

Martin J Jonson