| 摘要 |
A method and apparatus for generating a frequency selective output pulse from a carrier frequency signal pulse of a predetermined duration. Included are pulse means for generating at least one modulating pulse of predetermined amplitude, duration, and frequency content; filter means responsive to said modulating pulse for removing selected frequencies from the frequency content of said modulating pulse, said filter means having a predetermined transfer function so as to provide a modulating signal varying in amplitude as a function of time; and modulator means responsive to a carrier frequency signal pulse and said modulating signal for modulating the amplitude of the carrier frequency signal pulse and providing a frequency selective output pulse having a predetermined frequency content centered about the carrier frequency in the carrier frequency signal pulse.
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