Detection of unknown symbol rate in a digitally modulated...

Details Detection of unknown symbol rate in a digitally modulated... Detection of unknown symbol rate in a digitally modulated...

Filed on

2008-05-20

Date issued

2008-05-20

Examiner

Ahn, Sam K (Department: 2611)

Patent Class

Pulse or digital communications

SubClass

Receivers

Type

Reexamination Certificate

Status

active

Patent number

07376204

Description

ABSTRACT:
In one embodiment of the invention, a symbol rate detector includes a nonlinear device to receive a pass band signal, a component to apply a Fourier Transform to a signal provided by the filter, and logic to select a peak frequency component from results of applying the Fourier Transform and to apply the peak frequency component as a symbol rate of a base band signal corresponding to the pass band signal.

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D.E. Reed, et. al. Minimization of Detection of Symbol-Rate Spectral Lines by Delay and Multiply Receivers. IEEE Transactions on Communications, vol. 36, No. 1, Jan. 1988.
William A. Gardner. Signal Interception: A Unifying Theoretical Framework for Feature Detection. IEEE Transactions on Communications, vol. 36, No. 8, Aug. 1988.
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Thomas T. Fang. I and Q Decomposition of Self-Noise in Square-Law Clock Regenerators. IEEE Transactions on Communications, vol. 36, No. 9, Sep. 1988.
R.J. Mammone, et. al. Estimation of Carrier Frequency, Modulation Type and Bit Rate of an Unknown Modulated Signal. Rutgers University, Dept. of ECE. CH2424-0\87\0000-1006. 1987 IEEE.
Nelson M. Blachman, et. al. The Spectrum of the Square of a Synchronous Random Pulse Train. IEEE Transactions on Communications, vol. 38, No. 1, Jan. 1990.
Yawpo Yang, et. al. An Improved Moment-Based Algorithm for Signal Classification. Signal Processing 43 (1995) 231-244. Elsevier Science B.V. SSDI 0165-1684 (95) 00002-X.

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