DEVICE FOR ESTIMATING SIGNAL INTERFERENCE RATIO AND DEVICE FOR ESTIMATING INTERFERENCE SIGNAL

PROBLEM TO BE SOLVED: To provide a signal interference ratio estimating device and a signal interference estimating device capable of calculating the signal interference ratio between a desired signal component included in a communication signal and an interference signal component with high accuracy. SOLUTION: This signal interference ratio estimating device has a first operating means for outputting the mean square of the communication signal as a first output signal P, a second operating means for averaging the communication signal over n samples and outputting the mean square of the averaged communication signal as a second output signal Q, a desired signal calculating means for calculating the desired signal component A by multiplying the difference between the result obtained by multiplying the second output signal by (n), being the number of averaging number and the first output signal, by a prescribed number CA, an interference signal calculating means for calculating the interference signal component B by multiplying the difference between the first output signal and the second output signal by a prescribed number CB, and a signal to interference ratio calculating means for calculating a value that is in proportion to the signal to interference ratio SIR by calculating the ratio of the desired signal component to the interference signal component. COPYRIGHT: (C)2005,JPO&NCIPI