Telecommunications – Receiver or analog modulated signal frequency converter – Plural receivers
Patent
1983-08-08
1985-11-26
Ng, Jin F.
Telecommunications
Receiver or analog modulated signal frequency converter
Plural receivers
455139, 455318, 455313, 455226, H04B 126, H04B 1700
Patent
active
045558078
ABSTRACT:
An improvement to a baseband system having a plurality of down converters feeding a single baseband receiver for assuring the same mean time to intercept while maximizing the probability of intercept as a multi-band, autonomous receiver. All channels of the converter unit are operated simultaneously and a unique tag is added to the output signal from each of the down converters whereby the signal can be identified by the balance of the system as to its associated converter. In one embodiment, the tag comprises an amplitude notch appearing on the output signal at a different time following the receiver threshold being exceeded. In a second embodiment, the tag comprises a frequency step added to and/or subtracted from each output signal at the same time following the exceeding of the receiver threshold. In a third embodiment, the tag comprises a phase shift applied to the output signal.
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Etlinger Louis
Ng Jin F.
Sanders Associates Inc.
Weinstein Stanton D.
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