Apparatus and method for cross clock domain interference cancellation
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United States of America Patent
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Oct 21, 2014
Grant Date -
Aug 23, 2012
app pub date -
Feb 14, 2012
filing date -
Feb 17, 2011
priority date (Note) -
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Abstract
An apparatus and method for cross clock domain interference cancellation is provided to a communication system which includes a transmitter operated in a first clock domain and a receiver operated in a second clock domain. The apparatus comprises a First-In-First-Out (FIFO) circuit and a cancellation signal generator. The FIFO circuit receives a digital transmission signal of the transmitter in the first clock domain, and outputs the digital transmission signal in the second clock domain according to an accumulated timing difference between the first and second clock domains. The cancellation signal generator generates a cancellation signal for canceling an interference signal received by the receiver according to the digital transmission signal outputted by the FIFO circuit. The interference signal is generated in response to the digital transmission signal. The cancellation signal generator adjusts the cancellation signal according to a phase difference between the interference signal and the cancellation signal.
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