United States Patent 7,542,777
Haim June 2, 2009
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Fast adaptive power control for a variable multirate communications system
Abstract
A system and a method of controlling transmitter power in a wireless communication system in which user data is processed as a multirate signal in which the user data signal having a first rate is converted into a transmission data signal having a faster second rate for transmission. The transmission power is adjusted on a relatively slow basis based on quality of data received by a receiver of the transmitted data. The transmitter power is determined as a function of the first and second rates such that a change in the data rate in the multiple channels or the rate of the transmission data signal is compensated in advance of a quality of data based adjustment associated with such data rate change. Preferably, the user data signal having the first rate is converted into the transmission data signal having the second faster rate by repeating selected data bits whereby the energy per bit to noise spectrum density ratio is increased in the transmission data signal.
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Inventors: Haim; John W. (Baldwin, NY)
Assignee: InterDigital Technology Corporation (Wilmington, DE)
Appl. No.: 11/654,967
Filed: January 17, 2007
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Related U.S. Patent Documents
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Application Number Filing Date Patent Number Issue Date
11000297 Nov., 2004 7215974
10077077 Feb., 2002 6868278
09904001 Jul., 2001 6823194
09904020 Jul., 2001 6832095
60221348 Jul., 2000
60223375 Aug., 2000
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Current U.S. Class: 455/522 ; 455/39; 455/69
Current International Class: H04B 7/00 (20060101)
Field of Search: 455/522,67.1,39,69,423,24,67.7,115.1-115.4,466,426.1 370/311,328,332,333 375/222,223
