| 摘要 |
PROBLEM TO BE SOLVED: To reduce adverse effects of second-order distortion of TX signal leakage in a full-duplex, wireless communication system.SOLUTION: To reduce or eliminate second-order distortion of transmit signal leakage, a wireless device squares a combined signal that carries both a desired RX signal and a TX leakage signal. The device exhibits strong second-order nonlinearity to, in effect, square the combined signal. The device subtracts the squared signal from an output of a mixer in a receive path, canceling out at least some of the second-order distortion caused by the mixer. The device reduces adverse effects of the second-order distortion of the TX signal leakage, and thereby enhances or maintains receiver sensitivity. |
