| 摘要 |
PROBLEM TO BE SOLVED: To exactly estimate interference wave power by finding the variance of a correlation value to a channel estimate, finding the variance for sign inversion value of the correlation value to the channel estimate, defining the smaller of the two variances as effective data and defining the average value of the effective data as the estimate of the interference wave power. SOLUTION: When all the bits of a pilot channel are '+1', the variance value [ Ce(channel estimate)-Cor' (correlation value)}2] outputted by a variance computing element 6A gets smaller than a value [Ce -Cor'(correlation value sign inverted by a sign inverter 5)}2] outputted by a variance computing element 6B, a variance value (Ce-Cor')-2}is given to an averaging circuit 6E as effective data and the estimate of a correlator I is obtained. When the data of the pilot channel are '-1', at a TPC bit excluding section, the variance value [ Ce-(-Cor')}2] outputted from the variance computing element 6A is applied to the averaging circuit 6E as the effective data. |
