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. 06, 2007
Filed:
Jun. 05, 2003
Applicants:
Levent Demirekler, Columbia, MD (US);
Aleksandar Purkovic, Potomac, MD (US);
Inventors:
Levent Demirekler, Columbia, MD (US);
Aleksandar Purkovic, Potomac, MD (US);
Assignee:
Nortel Networks Limited, , CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04K 1/10 (2006.01); H04L 25/08 (2006.01);
U.S. Cl.
CPC ...
Abstract
A multi-stage signal processing method is provided that reduces the Peak to Average Power Ratio (PAPR) of an Orthogonal Frequency Division Multiplexed (OFDM) signal without increasing the bit error rate of the system. The multi-stage processing system apportions the tones into a number of types, and processes the tones in an order and by a process consistent with their determined type. Advantageously, preprocessing of the time domain signal may be used to condition the data tones for optimal PAPR reduction during the multi-stage process.