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:
Feb. 05, 2002
Filed:
Apr. 20, 2000
Brian William Kroeger, Sykesville, MD (US);
Roy Ronald Stehlik, Columbia, MD (US);
Denise Maureen Cammarata, Owings Mills, MD (US);
Ibiquity Digital Corporation, Columbia, MD (US);
Abstract
A broadcasting method comprising the steps of encoding program material using codes including a first set of bits and a second set of bits, the first set of bits contributing a greater coding gain to the codes than the second set of bits, modulating a plurality of orthogonal frequency division multiplexed carrier signals with the codes, whereby the first set of bits are carried by a first group of the carrier signals and the second set of bits are carried by a second group of the carrier signals, the first group of carrier signals being less susceptible to interference than the second group of carrier signals, broadcasting the carrier signals, receiving the carrier signals, estimating the interference to which the carrier signals in the second group have been subjected to determine if carrier signals in the second group have been corrupted, erasing bits carried by any of the carrier signals which have been determined to be corrupted, and decoding bits of the codes that have not been erased.