| 摘要 |
For recombining a message transmitted by a frequency hopping transmitter at a fast changing transmitting frequency, there are used a digital FFT search receiver for cyclically evaluating the frequency band occupied by the frequency hopping transmitter, at least one interception receiver capable of being switched by the FFT search receiver to the respective instantaneously used transmitting frequency of the frequency hopping transmitter, and a digital storage in which the stream of digital output data from the output of the permanently operative analog-to-digital converter of the FFT search receiver is temporarily stored, the delayed stream of output data from the storage being supplied to the input of the interception receiver.
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