Method and apparatus for classifying a baseband signal

Details Method and apparatus for classifying a baseband signal Method and apparatus for classifying a baseband signal

2001-03-22

2002-10-15

Vo, Don N. (Department: 2631)

Pulse or digital communications

Testing

C375S316000

Reexamination Certificate

active

06466614

ABSTRACT:

FIELD OF THE INVENTION
This invention relates in general to wireless communication systems, and more specifically to a method and apparatus for classifying a baseband signal.
BACKGROUND OF THE INVENTION
A wireless communication device must be able to scan for valid channels. The device must be able to determine the existence of and the quality of a multi-level signal in a quick and efficient manner. Prior-art wireless communication receivers have utilized a variety of correlation techniques in combination with histograms for classifying received signals.
The prior-art techniques have required an appreciable amount of memory and have tended occasionally to classify a signal falsely. What is needed is an improved method and apparatus for classifying a received signal. The method and apparatus preferably will require less memory than prior-art techniques, will be more easily adapted to other signal types and will be more resistant to falsing.


REFERENCES:
patent: 4352193 (1982-09-01), Acker
patent: 4885757 (1989-12-01), Provence
patent: 5303269 (1994-04-01), Altes
patent: 5561665 (1996-10-01), Matsuoka et al.
patent: 5651030 (1997-07-01), Wong et al.
patent: 5832038 (1998-11-01), Carsello
patent: 6198779 (2001-03-01), Taubenheim et al.

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