Telecommunications – Receiver or analog modulated signal frequency converter – Measuring or testing of receiver
Patent
1978-05-01
1980-05-20
Martin, John C.
Telecommunications
Receiver or analog modulated signal frequency converter
Measuring or testing of receiver
324 77B, 343 5SA, H04B 1700
Patent
active
042041651
ABSTRACT:
A multichannel coherent receiver employing multiple delay lines in series or a tapped delay line into which a received signal band is introduced. The signal band at each tap or increment of delay is mixed with individual related frequencies and the product from the mixers summed and further mixed with the output of a swept oscillator. The composite delayed signal band is introduced into a bank of dispersive filters followed by means for deriving in-phase and quadrature components. Signals contained within the signal band may then be detected resulting in coherent channelization, improved frequency resolution and full time coverage sampling.
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patent: 4005417 (1977-01-01), Collins
patent: 4131852 (1978-12-01), Holland-Moritz
J. B. Harrington et al., "Compressive Intercept Receiver Using SAW Devices", Microwave Journal, 17,9, pp. 57-62, 1974.
R. M. Hays et al., "Surface Wave Transform Adaptable Processor System", Ultrasonic Symposium Proc., IEEE, Cat. No. 75, CHO 994-4SU, 1975.
J. D. Maines et al., "A Novel SAW Variable-Frequency Filter", Ultrasonic Symposium Proc., IEEE, Cat. No. 75, CHO 994-4SU, 1975.
J. M. Alsup, "Surface Acoustic Wave CZT Processors", Ultrasonic Symposium Proc., IEEE, Cat. No. 74, CHO 896-1SU, 1974.
G. R. Nudd et al., "Chirp Signal Processing Using Acoustic Surface Wave Filters", Ultrasonic Symposium Proc., IEEE, Cat. No. 75, CHO 994-4SU, 1975.
Martin John C.
Ng Jin F.
Typoligics, Inc.
Wagner John E.
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