| 摘要 |
PROBLEM TO BE SOLVED: To provide an adaptive filter (430) for transmission leak signal cancellation. SOLUTION: There is described an adaptive filter, suitable for manufacturing on an RF integrated circuit, to be used for transmission (TX) leak cancellation in a wireless full-duplex communication system. The adaptive filter includes adders (530, 540) and an adaptive estimator (510). The adder receives a signal having a TX leak signal and an estimate signal having an estimate of the TX leak signal, the estimate signal is subtracted from the input signal, and an output signal having the attenuated TX leak signal is provided. The adaptive estimator receives the output signal and a reference signal having a first version of a transmission signal, estimates the TX leak signal in the input signal on the basis of the output signal and the reference signal, and provides the estimate signal. The adaptive estimator may also utilize an LMS algorithm to suppress, to a minimum, a mean square error between the TX leak signal in the input signal and the TX leak signal estimate in the estimate signal. COPYRIGHT: (C)2010,JPO&INPIT
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