The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 01, 2003
Filed:
Dec. 08, 2000
Matthew R. Perkins, Sunrise, FL (US);
Robert E. Stengel, Pompano Beach, FL (US);
Vernon A. Allen, Sunrise, CA (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
An interference-robust coded-modulation scheme for optical communications and a method for modulating illumination for optical communications include optical signal transmitters connected to signal multipliers. The signal to be transmitted is multiplied by a pseudo-random noise code and transmitted within the transmitter emissions. A receiver converts the received modulated light and correlates the received signal. An estimate of the signal to be transmitted is made by multiplying the received signal by the noise code and correlating such multiplication over the length of the code. A threshold switch outputs the correlation result to a bit estimator approximately when a deterministic peak of the output signal exceeds a threshold.