Comment on "Variance Analysis of the Angle Output Voltage for an Amplitude Monopulse Receiver"

The above paper contains a misleading calculation of the mean of the output of a logarithmic detector whose input is a sine wave plus Gaussian noise. In this correspondence the nature of the inaccuracy is described, an exact expression for the mean is derived, and asymptotic expressions for the cases of low signal-to-noise and high signal-to-noise are obtained and compared to the previous result.