Telecommunications – Transmitter and receiver at separate stations – Optimum frequency selection
Reexamination Certificate
2006-03-14
2010-11-16
Nguyen, Lee (Department: 2618)
Telecommunications
Transmitter and receiver at separate stations
Optimum frequency selection
C455S063100, C455S067130, C455S451000, C370S445000
Reexamination Certificate
active
07835697
ABSTRACT:
This invention provides a method for improved frequency agility and preferably includes transmitting and receiving data on a primary channel; finding a secondary channel substantially free from interference during a period between data transmissions on the primary channel; and transmitting and receiving data on the secondary channel when an unacceptable level of interference is detected on the primary channel. In an alternate embodiment, data is preferably transmitted on a primary and a secondary channel during separate periods of a transmission interval. If an unacceptable level of interference is detected on either the primary or secondary channels, then the other channel is used for data transmission during one of the periods while another one of the periods is used to identify a new channel substantially free from interference to replace the bad channel.
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International Search Report for International Application No. PCT/US07/61615 dated Dec. 3, 2007; 2 pages.
The Written Opinion of the International Searching Authority for International Application No. PCT/US07/61615 dated Dec. 3, 2007; 4 pages.
Cypress Semiconductor Corporation
Nguyen Lee
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