Method and apparatus for RF carrier feedthrough suppression

Details Method and apparatus for RF carrier feedthrough suppression Method and apparatus for RF carrier feedthrough suppression

2003-07-24

2008-08-12

Tse, Young T. (Department: 2611)

Pulse or digital communications

Systems using alternating or pulsating current

Angle modulation

C375S281000, C375S296000, C375S308000, C330S149000

Reexamination Certificate

active

07412006

ABSTRACT:
A method includes performing a search method to determine a pair of receiver path correction signals, performing the search method to determine a pair of transmitter path correction signals, and using the pairs of receiver path and transmitter path correction signals to suppress a carrier signal. An apparatus includes a first pair of summers, an upconverter circuit coupled to the first pair of summers, a multiplexer coupled to the upconverter circuit, to a ground, and to an RF front end, a downconverter circuit coupled to the multiplexer, a second pair of summers coupled to the downconverter circuit, and a correction circuit coupled to the first and second pairs of summers.

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