Wireless packet switched communication systems and networks using adaptively steered antenna arrays

A delayed cancellation apparatus for use in a wireless routing device, the apparatus comprising:

• an antenna configuration having at least one transmitting antenna element and at least one co-located receiving antenna element;
• a transmitter operatively coupled to said at least one transmitting antenna element and configured to transmit a plurality of tones through said at least one transmitting antenna element during a testing phase and subsequently output a transmission signal to said at least one transmitting antenna element during a operating phase;
• a receiver operatively coupled to said at least one receiving antenna element;
• logic operatively coupled to said transmitter and said receiver and configured to:
• determine a scale factor for each of said plurality of tones based on detected coupling between said at least one transmitting antenna element and said at least one receiving antenna element during said testing phase,
• tap said transmission signal that is applied to said at least one transmitting antenna element during said operating phase,
• apply said determined scale factors to said tapped transmission signal, and
• combine said resulting scaled tapped transmission signal with a signal received by said receiver through said at least one receiving antenna element such that unwanted coupling in a resulting received signal is significantly reduced.

A delayed cancellation method for use in a wireless routing device, the method comprising:

• during a testing phase,
• causing a transmitter to transmit a plurality of tones through at least one transmitting antenna clement, and
• determining a scale factor for each of said plurality of tones based on detected coupling between said at least one transmitting antenna element and at least one co-located receiving antenna element;
• during a operating phase,
• causing said transmitter to output a transmission signal to said at least one transmitting antenna element,
• tapping said transmission signal that is applied to said at least one transmitting antenna element,
• applying said determined scale factors to said tapped transmission signal, and
• combining said resulting scaled tapped transmission signal with said transmission signal such tat unwanted coupling in a signal received by said at least one receiving antenna element is significantly reduced.

A delayed cancellation apparatus for use in a wireless routing device, the apparatus comprising:

• an antenna configuration having at least one transmitting antenna element and at least one co-located receiving antenna element;
• a transmitter operatively coupled to said at least one transmitting antenna element and configured to transmit a plurality of tones through said at least one transmitting antenna element during a testing phase and subsequently output a transmission signal to said at least one transmitting antenna element during a operating phase;
• a receiver operatively coupled to said at least one receiving antenna element;
• logic operatively coupled to said transmitter and said receiver and configured to:
• determine a scale factor for each of said plurality of tones based on detected coupling between said at least one transmitting antenna element and said at least one receiving antenna element during said testing phase,
• tap said transmission signal that is applied to said at least one transmitting antenna element during said operating phase,
• apply said determined scale factors to said tapped transmission signal, and combine said resulting scaled tapped transmission signal with said transmission signal such that unwanted coupling in a signal received by said receiver through said at least one receiving antenna element is significantly reduced.