Pulse or digital communications – Receivers – Angle modulation
Reexamination Certificate
2006-04-18
2006-04-18
Chin, Stephen (Department: 2634)
Pulse or digital communications
Receivers
Angle modulation
C375S233000, C375S324000, C375S340000, C375S350000
Reexamination Certificate
active
07031405
ABSTRACT:
Carrier phase recovery employs a single-axis blind cost criterion from the Bussgang class of functions, and its stochastic gradient, to generate a carrier phase error used to adjust a received and demodulated signal to near baseband. For one implementation, the estimate is derived in accordance with a Single-Axis Constant Modulus (SA-CM) criterion and its stochastic gradient via a SA-CM algorithm (SA-CMA). The carrier phase error is then used to adjust the carrier frequency and phase of the received and demodulated signal toward the frequency and phase of the carrier used to modulate the transmitted symbols, driving the carrier phase error to zero. The values used for the phase recovery may be either i) an IIR filtered signal, ii) a processed signal (e.g., decisions for the signal symbols), or iii) an equalized and processed signal.
REFERENCES:
patent: 5692011 (1997-11-01), Nobakht et al.
patent: 5852630 (1998-12-01), Langberg et al.
patent: 5872815 (1999-02-01), Strolle et al.
patent: 6418164 (2002-07-01), Endres et al.
patent: 6426972 (2002-07-01), Endres et al.
Filho et al. (new bussgang method for blind equalization Acoustics, Speech, and Signal Processing, 1997. ICASSP-97, 1997 IEEE International Conference on, vol.: 3, Apr. 21-24, 1997, pp.: 2269-2272 vol. 3).
“Self-Recovering Equalization and Carrier Tracking in Two-Dimensional Data Communication Systems” by D. N. Godard, IEEE Transactions on Communications, vol. 28, No. 11, Oct. 1980, pp. 1867-1875.
“A New Approach to Multipath Correction of Constant Modulus Signals” by John R. Treichler and Brian G. Agee, IEEE Transactions On Acoustics, Speech, And Signal Processing, vol. ASSP-31, No. 2, Apr. 1983, pp. 459-471.
“Global convergence Of A Single-Axis Constant Modulus Algorithm” by A. Shah, et al, Proceedings of the Statistical Signal and Array Processing Workshop, Pocono Manor, PA, Aug. 2000.
“Blind Deconvolution” by Simon Haykin, Chapter 2, Prentice Hall, Englewood Cliffs, NJ, 1994, pp. 8-59. cv.
Biracree Stephen L.
Casas Raúl A.
Endres Thomas J.
Hulyalkar Samir N.
Strolle Christopher H.
ATI Research, Inc.
Chin Stephen
Mendelsohn Steve
Wang Ted M.
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