Generation of a constant envelope signal

Details Generation of a constant envelope signal Generation of a constant envelope signal

2008-10-28

2011-11-01

Feliciano, Eliseo Ramos (Department: 2857)

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Electrical signal parameter measurement system

C702S066000, C702S070000, C702S071000

Reexamination Certificate

active

08050880

ABSTRACT:
One or more embodiments of the present invention relates to an iterative method for generating an almost-constant, nearly constant, or substantially-constant envelope time signal with prescribed Fourier transform magnitude in the frequency domain, and a constant envelope time signal whose Fourier transform magnitude closely matches the prescribed Fourier transform magnitude in the frequency domain. Different starting points for the iterative algorithm give rise to different solutions and their accuracy can be adjusted using a monotonic error criterion presented here.

REFERENCES:
patent: 5067158 (1991-11-01), Arjmand
patent: 7486744 (2009-02-01), Shako et al.
patent: 7746761 (2010-06-01), Green
Balestra et al. ‘A Generalized Modulation Law for Generating Constant Envelope Spread Spectrum Signals via Frequency Modulation’, 2004, NDES Publication, pp. 79-82.
Frequency notched waveforms for medical ultrasound imaging, Michael J. Bennett, Tom Anderson, W. Norman McDicken, Department of Medical Physics, University of Edinburgh, 2007 IEEE Ultrasonics Symposium, pp. 789-792.
Image Recovery: Theory and Application, Edited by Henry Stark, Dept. of Electrical, Computer, and Systems Engineering, RPI, Troy New York, 1987, Academic Press, Inc., pp. 29-30, 46-49.
Image Restoration by The Method of Generalized Projections With Application to Restoration From Magnitude, Levi and Stark, Dept. of Electrical, Computer, and Systems Engineering RPI, Troy, New York © 1984, IEEE, pp. 37.5.1-37.5.4.

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