Patent ID: 7352687

Claim:
An interference cancellation system configured to perform cancellation utilizing signals that are either analog domain signals or digital domain signals, or both, the system comprising: a first input configured to receive an incoming signal; a second input configured to receive a cancellation signal and provide the cancellation signal to a mixed signal processing system; an analog domain cancellation system comprising: a signal separation unit configured to separate the cancellation signal into a first portion and a second portion, wherein the second portion comprises one or more least significant bits of the cancellation signal; a digital to analog converter configured to convert the first portion of the cancellation signal into the analog domain; a first subtractor configured to subtract the analog cancellation signal from the incoming signal to create a modified incoming signal; an analog to digital converter configured to convert the modified incoming signal to the digital domain; a residual canceller configured to receive and filter the second portion of the cancellation signal to create a filtered second portion of the cancellation signal; and a second subtractor configured to subtract the filtered second portion of the cancellation signal from the modified incoming signal in the digital domain.