System and method for reducing peak-to-average ratio (PAR)...

Details System and method for reducing peak-to-average ratio (PAR)... System and method for reducing peak-to-average ratio (PAR)...

2006-09-05

2006-09-05

Tran, Khanh (Department: 2611)

Pulse or digital communications

Transceivers

Modems

Reexamination Certificate

active

07103097

ABSTRACT:
A system and method for reducing peak-to-average ratio (PAR) values in signal transmission systems is presented. The presented approach divides a plurality of symbols into a number of non-overlapping subsets of symbols, and manipulates each of the non-overlapping subsets of symbols to produce a plurality of sub-sequences. A strategic manipulation of the subsets of symbols results in the reduction of PAR values.

REFERENCES:
patent: 6314146 (2001-11-01), Tellado et al.
patent: 6366555 (2002-04-01), Gatherer et al.
patent: 6487253 (2002-11-01), Jones et al.
patent: 6580751 (2003-06-01), Gardner et al.
patent: 6657950 (2003-12-01), Jones et al.
patent: 6757299 (2004-06-01), Verma
patent: 6845082 (2005-01-01), Bourget et al.
Power Consumption and PAR in DSLs John M. Cioffi and Jose Tellado; Aug. 3-7, 1998.
The Crest Factor for Trigonometric Polynomials Part I: Approximation Theoretical Estimates K. Jetter, G. Pfander, and G. Zimmerman; 2001.
Analog Codes for Peak-to-Average Ratio Refuction Werner Henkel; Jan. 17-19, 2000.
Analysis of Tone Selection for PAR Reduction Niklas Petersson, Albin Johansson, Per Odling and Per Ola Borjesson; 2001.
Another Application for Trellis Shaping: PAR Reduction for DMT (OFDM) Werner Henkel; Sep. 2000.
PAR Reduction Revisited: An Extension to Tellado's Method Werner Henkel and Valentin Zrno; Sep. 18-19, 2001.

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