Wireless packet switched communication systems and networks using adaptively steered antenna arrays
View Patent ↗Methods, apparatuses and systems are provided for use in a wireless routing network. One apparatus, for example, includes an adaptive antenna that is configurable to receive a transmission signal from a transmitter and in response transmit corresponding outgoing multi-beam electromagnetic signals exhibiting a plurality of selectively placed transmission peaks and transmission nulls within a far field region of a coverage area. The adaptive antenna may also be configured to selectively receive at least one incoming electromagnetic signal directed through the coverage area. The adaptive antenna includes at least one antenna array and logic. The antenna array has a plurality of antenna elements. The logic is operatively coupled to the antenna array and configured to selectively control the placement of the transmission peaks and transmission nulls within the outgoing multi-beam electromagnetic signals. The logic may also be configured to selectively control the reception of at least one incoming electromagnetic signal. The logic is configured to be responsive to routing information. Such routing information may be dynamically maintained in one or more routing tables.
1. 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 element, 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 a signal received through said at least one receiving antenna element such that unwanted coupling in a resulting received signal is significantly reduced.
2. The method as recited in claim 1 , wherein said plurality of tones includes OFDM tones.
3. 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.
4. 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.
5. The method as recited in claim 4 , wherein said plurality of tones includes OFDM tones.
6. 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.