Thomas G Anderl

US Patent:

7592897, Sep 22, 2009

Filed:

Sep 4, 2007

Appl. No.:

11/849737

Inventors:

Christopher J. Diorio - Shoreline WA, US
Thomas G. Anderl - Seattle WA, US
Scott A. Cooper - Seattle WA, US
Aanand Esterberg - Seattle WA, US

Assignee:

Impinj, Inc. - Seattle WA

International Classification:

H04Q 5/22
G08B 13/14

US Classification:

340 102, 3405722, 455509, 455 631, 375133, 375132, 370468, 370329

Abstract:

RFID readers, systems, and methods are provided for overcoming the effects of RF interference. While a system is communicating in a channel, RF interference is monitored. If it is low, then hopping to another channel is performed according to an ordinary decision. But if interference is high, then hopping out to another channel can be earlier than would be dictated by the ordinary decision under the same circumstances. The earlier hopping out can result in diminishing communication in channels with a lot of RF interference.

US Patent:

20070296590, Dec 27, 2007

Filed:

Sep 4, 2007

Appl. No.:

11/849804

Inventors:

Christopher Diorio - Shoreline WA, US
Aanand Esterberg - Seattle WA, US
Thomas Anderl - Seattle WA, US
Scott Cooper - Seattle WA, US

International Classification:

G08B 13/14

US Classification:

340572200

Abstract:

RFID readers, systems, and methods are provided for overcoming the effects of RF interference. While a system is communicating in a channel, RF interference is monitored. If it is low, then the next channel to be hopped onto is chosen in an unbiased manner. But if interference is high, then the next channel to be hopped onto is chosen in a biased manner that disfavors at least one channel over another, in view of the detected interference. The choice of the next channel can thus result in diminishing communication in channels with a lot of RF interference.