| 摘要 |
Parameters of identification of a target and of a background are applied to a digital processing unit 2 operating in asynchronism in relation to the receiving radar 4 to deliver to an echo generator 1 target and background signals dependent upon the factor by which the evolution frequency is less than the recurrence frequency of the radar 4. The analogue circuit 1 operating in synchronism with the emission of the radar produces analog signals, the evolution of which takes place at a frequency greater than the recurrence frequency of the radar and combines these signals with the signals emanating from the unit 2 to form output microwave signals which are modulated in amplitude, phase and duration and which are representative of echoes from the target and from the background which are simulated. Application, in particular, to aeronautics. <IMAGE>
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