InterDigital Inc (IDCC)

[Gamco]

United States Patent 7,764,707
Li July 27, 2010

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Method for adaptive quadrature amplitude modulation signal constellation remapping for data packet retransmissions


Abstract
A simplified QAM signal constellation symbol-wise remapping scheme for data packet retransmissions to improve performance at a high coding rate. The simplified QAM signal constellation symbol-wise remapping scheme takes advantage of the separate I and Q labeling bits in a QAM signal to reduce the complexity of a receiving node. A method for adaptive switching between bit-wise and symbol-wise constellation remapping for data packet transmissions according to channel coding rate to achieve optimum performance across the range of channel coding rates.


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Inventors: Li; Yingxue (Exton, PA)
Assignee: InterDigital Technology Corporation (Wilmington, DE)

Appl. No.: 11/686,994
Filed: March 16, 2007

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Related U.S. Patent Documents

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Application Number Filing Date Patent Number Issue Date
60783644 Mar., 2006


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Current U.S. Class: 370/465 ; 370/207; 714/748
Current International Class: H04L 1/18 (20060101)