| 摘要 |
<p>PURPOSE:To control the rate of erroneously issued alarms at a constant rate regardless of what distribution characteristics an output signal has by converting the accumulated distribution characteristics of receiver output signal into a Layleigh distribution characteristics. CONSTITUTION:The output signal (clutter) from a receiver has its parameter measured according to the characteristics of clutter amplitude by means of a parameter measuring unit 101. In other words, a shape parameter k that specifies an arbitrary accumulation distribution function Fx(X) and a scale parameter sigma are measured. Next, after logarithmic conversion 102 the clutter is provided with it, and then it is supplied to a multiplication unit 106 through a power multiplication unit 105. The units 105 and 106 are given parameter k and sigma respectiely from a parameter set-up circuit 11. Accordingly a function Y (FormulaI) that has been converted to Rayleigh distribution is output from the unit 106. The rate of erroneously issued alarms can be controlled to a constant value by treating the output by a LOG-CFAR system 20.</p> |
