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:
Nov. 30, 2010
Filed:
Jul. 31, 2007
Ernest C. Chen, San Pedro, CA (US);
Joseph Santoru, Agoura Hills, CA (US);
Shamik Maitra, Redondo Beach, CA (US);
Dennis Lai, Cerritos, CA (US);
Tung-sheng Lin, Claremont, CA (US);
Guangcai Zhou, Agoura Hills, CA (US);
Ernest C. Chen, San Pedro, CA (US);
Joseph Santoru, Agoura Hills, CA (US);
Shamik Maitra, Redondo Beach, CA (US);
Dennis Lai, Cerritos, CA (US);
Tung-Sheng Lin, Claremont, CA (US);
Guangcai Zhou, Agoura Hills, CA (US);
The DIRECTV Group, Inc., El Segundo, CA (US);
Abstract
Systems for delivering a plurality of broadcast programs where the transmitter and receiver roll-off factors are mismatched. A system in accordance with the present invention comprises a transmitter comprising a modulator, and a plurality of receivers, each receiver in the plurality of receivers receiving the plurality of broadcast programs, each receiver in the plurality of receivers further comprising a demodulator; wherein the modulator has a first root-raised cosine filter having a first roll-off factor and each receiver has a second root-raised cosine filter having a second roll-off factor, the first roll-off factor being smaller than the second roll-off factor.