InterDigital Inc (IDCC)

[Gamco]

United States Patent 7,590,172
Li , et al. September 15, 2009

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Low bias estimation of small signal-to-noise ratio


Abstract
A user equipment includes an estimator. The estimator is configured to select a first estimate of a signal-to-noise (SNR) ratio, calculate a first amplitude and first noise variance, calculate a second amplitude and a second noise variance, calculate a second SNR, calculate a resolution value, adjust the first SNR, and perform estimation iterations until the resolution value is equal to a predetermined value.


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Inventors: Li; Bin (Shenzhen, CN), DiFazio; Robert A. (Greenlawn, NY), Zeira; Ariela (Huntington, NY)
Assignee: InterDigital Technology Corporation (Wilmington, DE)

Appl. No.: 12/060,541
Filed: April 1, 2008

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Related U.S. Patent Documents

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Application Number Filing Date Patent Number Issue Date
10867508 Jun., 2004 7376178
10269606 Jul., 2004 6760370
60369655 Apr., 2002


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Current U.S. Class: 375/227 ; 375/229; 375/346; 375/347; 375/348; 375/349; 375/350; 702/69
Current International Class: H04B 3/46 (20060101); H04B 17/00 (20060101); H04Q 1/20 (20060101)
Field of Search: 375/227,229,346-350 702/69