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:
Jan. 04, 2005
Filed:
May. 10, 2001
Richard L. Davis, Redondo Beach, CA (US);
Richard L. Davis, Redondo Beach, CA (US);
Northrop Grumman Corporation, Los Angeles, CA (US);
Abstract
A photonic arbitrary waveform modem utilizes a bipolar coding scheme. The bipolar coding scheme includes an arbitrary waveform modem which includes a plurality of tapped delay lines and is implemented by partitioning each optical frequency chip into positive and negative segments. Signals are decoded by effectively multiplying the transmit and receive code vectors and individually summing the positive and negative tap weights. The positive and negative tap weights are differenced to recreate the transmitted signal. The bipolar coding scheme allows for the use of truly orthogonal codes which decreases the interference and reduces the probability of detection.