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:
Dec. 23, 2008
Filed:
Jan. 18, 2007
Weizheng Wang, Rancho Palos Verdes, CA (US);
Guangcai Zhou, Reseda, CA (US);
Tung-sheng Lin, Alhambra, CA (US);
Ernest C. Chen, San Pedro, CA (US);
Joseph Santoru, Agoura Hills, CA (US);
William C. Lindsey, Pasadena, CA (US);
Weizheng Wang, Rancho Palos Verdes, CA (US);
Guangcai Zhou, Reseda, CA (US);
Tung-Sheng Lin, Alhambra, CA (US);
Ernest C. Chen, San Pedro, CA (US);
Joseph Santoru, Agoura Hills, CA (US);
William C. Lindsey, Pasadena, CA (US);
The DIRECTV Group, Inc., El Segundo, CA (US);
Abstract
A method and apparatus for optimizing a system for transmitting a layered modulated signal is disclosed. The method comprises the steps of defining the system in terms of a set of system parameters, including an optimal power separation S between a power of a first modulation layer and a power of a second modulation layer and a required system carrier-to-noise ratio (CNR), determining an optimal power separation S to minimize the error rate of a lower layer modulated signal BER, and selecting the remaining system parameters in the set of system parameters using the determined optimal power separation S.