Patent ID: 9461697
Filing Date: 2016-10-04
CPC Classification: H04B,H04Q

Claim Text:
1. A transceiver coupled to an antenna, comprising: a multi-port filter having a bidirectional port coupled to the antenna, at least one input port and at least one output port; a transmit datapath receiving a transmission signal and providing the transmission signal for transmission by the antenna through the multi-port filter, the transmit datapath being coupled to the input port of the multi-port filter; a receive datapath receiving a reception signal from the antenna, the receive datapath being coupled to the output port of the multi-port filter; a band-pass filter coupled to the antenna for receiving a sampled signal that includes intermodulation components between two or more of an external signal, the transmission signal and the reception signal; and a monitoring and cancellation circuit receiving the transmission signal, the reception signal, an output of the band-pass filter, and a feedback signal from a baseband processor to cancel the intermodulation components, wherein the baseband processor generates the feedback signal based on an output of the monitoring and cancellation circuit, wherein parameters of the monitoring and cancellation circuit are adjusted based on the feedback signal to cancel the intermodulation components under current operating conditions, and wherein the parameters of the monitoring and cancellation circuit are adjusted by minimizing a cost function according to a quality-of-signal figure of merit provided by the feedback signal, the quality-of-signal figure of merit including a signal-to-interference ratio or an error vector magnitude of reference symbols, obtained from demodulating an output of the monitoring and cancellation circuit.