Patent ID: 7684508
Filing Date: 2010-03-23
Classification: H04B,H04L

Abstract:
1. A transmission diversity detecting apparatus applied in a Wideband Code-division multiple-access (WCDMA) system having a CIPCH channel and a synchronization channel for detecting an antenna diversity of a cell, the transmission diversity detecting apparatus comprising: a common pilot channel (CPICH) despreader for de-spreading a signal received from the cell according to a scrambling code to generate a plurality of CPICH symbols; a synchronization channel (SCH) despreader for de-spreading the signal received from the cell according to a synchronization code to generate a plurality of SCH symbols; a correlator, electrically connected to the CPICH despreader and the SCH despreader, for generating a plurality of correlation values according to the CPICH symbols and the SCH symbols; a decision module, coupled to the multiplication unit, for determining the antenna diversity only according to the correlation values, wherein the decision module comprises: a quality indicator generator, electrically connected to the correlator, for generating a quality indicator according to the correlation values, wherein the quality indicator is used for indicating the reliability of the antenna diversity determined by the detecting unit, and the quality indicator generator comprises: a delay unit, electrically connected to the correlator, for generating a plurality of delayed values according to the correlation values, respectively; an adder, electrically connected to the correlator and the delay unit, for generating a plurality of first computing values according to outputs of the delay unit and outputs of the computing unit; an absolute value computing unit, coupled to the adder, for generating a plurality of absolute values of the first computing values; a second accumulating unit, electrically connected to the absolute value computing unit, for generating a second accumulating value derived from absolute values; and a quality verifying unit, electrically connected to the first accumulating unit and the second accumulating unit, for generating the quality indicator according to the first accumulating value and the second accumulating value.