Transmission canceller for wireless local area network

An apparatus configured to cancel a leakage signal coupled from a transmitter to a receive signal path associated with a receiver, the transmitter and the receiver contained in a single wireless device operating using at least two frequency channels, the receiver operating on a first one of the at least two frequency channels and the transmitter operating on a second one of the at least two frequency channels, the apparatus comprising:

• a radio frequency interface;
• a processor;
• and
• a memory coupled to the processor and the radio frequency interface, the memory containing instructions for causing the processor to:
• sample a signal for transmission on the second of the at least two frequency channels;
• adjust one or more parameters associated with the sampled signal to form an adjusted signal;
• and
• combine the adjusted signal with the receive signal path including the leakage signal, to form a combined signal so as to cancel the leakage signal.

A canceller configured to cancel a leakage signal coupled from a transmitter to a receive signal path associated with a receiver, the transmitter and the receiver contained in a single wireless device operating using at least two frequency channels, the receiver operating on a first one of the at least two frequency channels and the transmitter operating on a second one of the at least two frequency channels, the canceller comprising:

• a first coupler coupled to the transmit signal path, the first coupler configured to generate a reference signal;
• a second coupler coupled to the receive signal path, the second coupler configured to couple an adjusted signal to the receive signal path;
• a third coupler coupled to the receive signal path, the third coupler configured to generate a sampled signal;
• a parameter adjuster configured to adjust at least a first and a second parameter associated with the adjusted signal;
• and
• a detector configured to detect a level associated with the leakage signal.

An apparatus configured to cancel a leakage signal coupled from a transmitter to a receive signal path associated with a receiver, the transmitter and the receiver contained in a single wireless device operating using at least two frequency channels, the receiver operating on a first one of the at least two frequency channels and the transmitter operating on a second one of the at least two frequency channels, the apparatus comprising:

• means for sampling a signal for transmission on the second of the at least two frequency channels;
• means for adjusting one or more parameters associated with the sampled signal to form an adjusted signal;
• and
• means for combining the adjusted signal with the receive signal path including the leakage signal, to form a combined signal so as to cancel the leakage signal.