Patent ID: 6111921
Filing Date: 2000-08-29
Classification: H04L

Abstract:
An estimator for estimating an error rate of data included in a phase shift keying (PSK) signal, comprising:a phase information generator for detecting from the received PSK signal a first baseband signal in a first detection axis and a second baseband signal in a second detection axis and generating phase information of said PSK signal on the basis of said first and second baseband signals;an envelope information generator for generating envelope information of said PSK signal on the basis of at least said first and second baseband signals;a phase error detector for outputting a phase error signal when said phase information indicates that said PSK signal is located in a predetermined phase area;an envelope error detector for outputting an envelope error signal when said envelope information indicates that said PSK signal is located in a predetermined envelope area;means for outputting an error signal in presence of both of said phase error signal and said envelope error signal; anda counter for counting said error signals for a predetermined time period and outputting a count value.