Pulse or digital communications – Receivers – Angle modulation
Patent
1995-02-03
1997-11-25
Bocure, Tesfaldet
Pulse or digital communications
Receivers
Angle modulation
375355, 375329, H04L 2722, H04L 700
Patent
active
056920148
ABSTRACT:
A high performance, low cost technique for carrier recovery and tracking of high rate demodulator (>200 Mbps to multi-gigabits per second) system is presented. The locally generated carrier is held in phase locked synchronism with the incoming modulated carrier through a carrier recovery scheme in which the modulated data is detected and subsampled using the bit synchronizing circuitry to provide a strobe signal for subsampling. The voltage levels of the subsampled data are analyzed to determine a phase error signal. The subsampled data are used to address a lookup table of error values stored in memory.
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Jeff Kirsten, "Undersampling reduces data-acquisition costs for select applications," EDN, pp. 217-228, 1990.
Basham Jack K.
Finkenbeiner Pascal G.
Kolze Thomas J.
Yamashiro Keith K.
Bocure Tesfaldet
TRW Inc.
Yatsko Michael S.
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