Pulse or digital communications – Receivers – Angle modulation
Reexamination Certificate
2006-11-21
2010-06-01
Payne, David C (Department: 2611)
Pulse or digital communications
Receivers
Angle modulation
C375S316000, C375S324000
Reexamination Certificate
active
07729455
ABSTRACT:
A phase-shift keying (PSK) receiver includes a carrier wave generator generating a carrier wave, an extracting unit extracting an in-phase component I and a quadrature component Q from a received signal on the basis of the carrier wave and the received signal, a comparator comparing the in-phase component I and the quadrature component Q extracted from the received signal to a predetermined threshold values respectively and acquiring 1-bit digital signals corresponding to the in-phase component I and the quadrature component Q respectively; and a BPSK demodulator demodulating the received signal using a binary phase-shift keying (BPSK) scheme on the basis of positional relationship on I-Q constellation between the 1-bit digital signals corresponding to the in-phase component I and the quadrature component Q acquired by the comparator.
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Figucia R. J.: “Advanced SCAMP's Demodulator Design For Performing Envelope Recovery From Hardlimited Samples” Military Communciations Conference, 1992, Milcom '92, Conference Record, Communications—Fusing Command, Control and Intelligence., IEEE San Diego, CA, USA Oct. 11-14, 1992, New York, NY, USA, IEEE, US, Oct. 11, 1992, pp. 385-389, XP010060779 (figure 1).
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Flores Leon
Harness & Dickey & Pierce P.L.C.
Payne David C
Seiko Epson Corporation
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