Pulse or digital communications – Receivers – Angle modulation
Patent
1995-06-07
1998-08-11
Vo, Don N.
Pulse or digital communications
Receivers
Angle modulation
375327, 375343, H04L 2714
Patent
active
057938180
ABSTRACT:
A CMOS integrated signal processing system for a sampling receiver includes a timing recovery circuit, wherein an on-chip numerically controlled oscillator is operative at periods T that are initially equal to the nominal baud rate of the signals controls a sinc interpolator receiving samples at the sampling rate. A loop filter is coupled to the sinc interpolator and to the numerically controlled oscillator. The arrangement is capable of handling various symbol rates. The system includes a circuit for carrier recovery, having a second on-chip numerically controlled oscillator, a digital derotation circuit responsive to the second numerically controlled oscillator, accepting an in phase component and a quadrature component of the sampled signals. An adaptive phase error estimation circuit is coupled in a feedback loop.
REFERENCES:
patent: 5077755 (1991-12-01), Kaku et al.
patent: 5087975 (1992-02-01), Citta et al.
patent: 5122875 (1992-06-01), Raychaudhuri et al.
patent: 5168356 (1992-12-01), Acampora et al.
patent: 5175617 (1992-12-01), Wallace et al.
patent: 5214676 (1993-05-01), Wilkinson
patent: 5287182 (1994-02-01), Haskell et al.
patent: 5294894 (1994-03-01), Gebara
patent: 5304953 (1994-04-01), Heim et al.
patent: 5309484 (1994-05-01), McLane et al.
patent: 5357544 (1994-10-01), Horner et al.
patent: 5467137 (1995-11-01), Zdepski
patent: 5497152 (1996-03-01), Wilson et al.
patent: 5500874 (1996-03-01), Terrel
patent: 5506636 (1996-04-01), Patel et al.
patent: 5568206 (1996-10-01), Goeckler
patent: 5579346 (1996-11-01), Kanzaki
ETS: European Telecommunication Standard 300 421. Dec. 1994.
Gardner, Floyd M. "A BPSK/QPSK Timing-Error Detector for Sampled Receivers." IEEE Transactions on Communications vol. 34, No. 5. May 1986, pp. 423-429.
Pellon, Leopold E. "A Double Nyquist Digital Product Detector for Quadrature Sampling." IEEE Transactions on Signal Processing 40, No. 7 Jul. 1992, pp. 1-11.
Performance Results of a 64/256-QAM CATV Receiver Chip Set; Henry Samueli, Charles P. Reames, Leo Montreuil and William E. Wall.
Bennett C. Wong, and Henry Samueli, A 200-MHz All-Digital QAM Modulator and Demodulator in 1.2-.mu.m CMOS for Digital Radio Applications, IEEE Journal of Solid-State Circuits, vol. 26, No. 12, Dec. 1991.
Citta, Rich; Ron Lee, Practical Implementation of a 43 Mbit/Sec. (8 Bit/Hz) Digital Modem for Cable Television. NCTA Technical Papers 1993 pp. 271-279, Zenith Electronics Corporation, Glenview, IL 60025.
Meyr, H., Ascheid, G. "Fully Digital Receiver for 100MBIT/ S 8-PSK Coded Transmission (Direcs)," Course 577 Advanced Digital Receivers for Mobile Communications: Algorithm, Design Methodology and DSP-Tools, Technologies CEI-Europe Oct. 2-5 1995, Italy; Mar. 25-29, 1996, Switerzland.
Robert A. Hawley, Thu-Ji Lin, and Henry Samueli, A 300 MHz Digital Double-Sideband to Single-Sideband Converter in 1 .mu.m CMOS, IEEE Journal of Solid-State Circuits, vol. 30, No. 1, Jan. 1995.
Samueli, Henry, Charles P. Reames, Leo Montreuil & William E. Wall, "Performance Results of a 64/256-QAM CATV Receiver Chip Set," Broadcom Corp., Los Angeles, CA & Scientific-Atlanta Inc., Norcross GA.
Claydon Anthony Peter J.
Gammack Richard J.
Bickel Arthur S.
Braun Robert T.
Clark Ronald J.
Discovision Associates
Vo Don N.
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