Estimator of error rate

摘要

An estimator of error rate is provided for reducing variations of an error pulse count value at burst signals of a received signal for digital mobile communications and thereby improving an accuracy of estimating an error rate. The estimator of error rate includes detectors for detecting that phase information derived from a baseband signal of an I channel (I signal) and a baseband signal of a Q channel (Q signal) is located in an error pulse generation area, detectors for detecting that envelope information of the I signal and the Q signal is located in the error pulse generation area, and a counter for detecting that the phase error signal and the envelope error signal are outputted and counting the signals. The estimator operates to estimate an error rate based on an error pulse count value at one period. The estimator operates to detect that the phase information and the envelope information are located in the error pulse generation area. This serves to suppress the probability of counting correct signals and reducing variations of a count value at the burst signals, thereby improving an accuracy of estimating an error rate.