| 摘要 |
<p>PURPOSE:To detect a target signal from a noise signal showing arbitrary noise distribution, by constituting the title apparatus of a linear amplifying circuit, a subtraction circuit, a non-linear amplifying circuit or the like. CONSTITUTION:A linear amplifying circuit 10 respectively inputs an amplified signal obtained by amplifying a receiving signal having amplitude (x) to a square average value calculation means 20 and a means 30 for calculating the square value of an average value. Next, a subtraction circuit 40 calculates a dispersion value sigma<2> on the basis of a square average value <X<2>> and the square value <X2> of the average value to add the same to a non-linear amplifying circuit 50 which in turn raises the dispersion value sigma<2> to k-th power (k is the arbitrary real number) to output a non-linear signal Z. By this method, since the magnitude of the dispersion value corresponding to a target signal becomes larger than that of the dispersion value corresponding to a noise signal, the target signal can be easily found out.</p> |
