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:
Jul. 22, 2003
Filed:
Jun. 02, 2000
John Christopher Greenwood, Near Chippenham, GB;
David Carotti, Brockenhurst, GB;
Nortel Networks Limited, St. Laurent, CA;
Abstract
Within a transmission channel in a frequency domain transmission medium, a plurality of non-contiguous channel portions are selected for data transmission. The selected channel portions are separated in frequency by unused channel portions. A transmitter generates a data frame of predetermined length for transmission, comprising a payload and an error detection portion. The frame length is equal to the length which would map for transmission into a symbol in the transmission channel if the entire channel were selected for transmission. The payload contains a header and a data portion, into which the transmitter inserts data bytes and a number of padding bytes. Block coding error correction is performed on the padded payload to generate error detection bytes to fill the error detection portion. The frame is then mapped into the frequency domain for transmission such that the header, data and error detection bytes map into the selected channel portions and the padding bytes map into the unused channel portions and are not transmitted. At a receiver, the padding bytes are reinstated and error detection performed to correct transmission errors in the header and the data. The corrected data is then extracted from the frame.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile