Patent ID: 7085311
Filing Date: 2006-08-01
Classification: H04B,H04W

Abstract:
1. An SIR measuring apparatus for an CDMA communication system, comprising: a path detector for detecting path delay amounts of a reception signal inputted; plural de-spreaders for de-spreading the reception signal inputted on the basis of the path delay amounts detected by said path detector; plural SIR estimators which are provided in connection with said plural de-spreaders and estimate SIR (Signal to Interference Ratio) values for every path; plural carrier phase estimators which are provided in connection with said plural de-spreaders and estimate carrier phase for every path; a path delay difference comparator for detecting, from the paths detected by said path detector, each pair of paths satisfying the condition that the difference in the path delay amounts between the paired paths is not more than a first threshold value; a carrier phase difference comparator for receiving the output from said carrier phase estimators, for receiving the path pairs outputted from said path delay difference comparator, comparing the carrier phase between the paths of each of the path pairs, and outputting each pair of paths satisfying the condition that the difference in carrier phases between the paired paths is not more than a second threshold value; an SIR comparator for receiving the SIR values outputted from said plural SIR estimators and the path pairs outputted from said carrier phase difference comparator, comparing the SIR values between the paths of each of the path pairs, outputting only the larger SIR value, and directly outputting the SIR values outputted from said SIR estimators with respect to paths other than the paired paths output from said carrier phase difference comparator; and an SIR combiner for summing the SIR values outputted from said SIR value comparator and outputting the total value.