| US 7,590,172 B2 | ||
| Low bias estimation of small signal-to-noise ratio | ||
| Bin Li, Shenzhen (China); Robert A. DiFazio, Greenlawn, N.Y. (US); and Ariela Zeira, Huntington, N.Y. (US) | ||
| Assigned to InterDigital Technology Corporation, Wilmington, Del. (US) | ||
| Filed on Apr. 01, 2008, as Appl. No. 12/60,541. | ||
| Application 12/060541 is a continuation of application No. 10/867508, filed on Jun. 14, 2004, granted, now 7,376,178. | ||
| Application 10/867508 is a continuation of application No. 10/269606, filed on Oct. 11, 2002, granted, now 6,760,370, filed on Jul. 06, 2004. | ||
| Claims priority of provisional application 60/369655, filed on Apr. 03, 2002. | ||
| Prior Publication US 2008/0181290 A1, Jul. 31, 2008 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. H04B 3/46 (2006.01); H04B 17/00 (2006.01); H04Q 1/20 (2006.01) | ||
| U.S. Cl. 375—227 [375/229; 375/346; 375/347; 375/348; 375/349; 375/350; 702/69] | 4 Claims |
| 1. A user equipment (UE) comprising:
an estimator configured to:
select a first estimate of a signal-to-noise ratio (SNR);
calculate an amplitude value based on a probability density and a noise variance based on the amplitude value;
calculate a second SNR based on the amplitude value and the noise variance;
calculate a resolution value based on the difference between the first SNR estimate and the second SNR;
adjust the first SNR estimate; and
perform estimation iterations until the resolution value is equal to a predetermined value.
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