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. 26, 2006
Filed:
Mar. 10, 2003
Anton Monk, San Diego, CA (US);
Edward Warner, San Diego, CA (US);
Itzhak Gurantz, San Diego, CA (US);
Ladd Elwardani, La Jolla, CA (US);
Ron Porat, La Jolla, CA (US);
Anton Monk, San Diego, CA (US);
Edward Warner, San Diego, CA (US);
Itzhak Gurantz, San Diego, CA (US);
Ladd Elwardani, La Jolla, CA (US);
Ron Porat, La Jolla, CA (US);
Entropic Communications, Inc., San Diego, CA (US);
Abstract
A broadband digital communication network transmits a signal with a shaped power spectrum to minimize interference with devices that share the communication medium. In one embodiment using coaxial wiring, devices such as cable converters and televisions that are not part of the network share the communication medium and are exposed to the network signal. Power levels across the network band are selected to reduce interference in the non-networked devices. One area of susceptibility is the tuner of cable channel receivers, which perform mixing and down conversion of RF signals. The power spectrum profile is selected to minimize the IF and base band interference after down conversion. The spectrum can be shaped within each 6 MHz band to further minimize the interference with a TV signal. The power levels can be optimized for both peak power limitation and quantization effects.