Full duplex adaptive array

A full duplex adaptive array system, comprising:

• a network array;
• at least four ports within the network array, wherein at least two transmission elements are at a first port, at least two transmission elements are at a second port, at least one receiving element is at a third port, and at least one receiving element is at a fourth port;
• a plurality of network paths connected between transmission elements and receiving elements in the network array, wherein:
• at least a first signal is transmitted along at least a first network path from the at least two transmission elements of the first port to the receiving element of the fourth port;
• the first signal is transmitted along at least a second network path from the at least two transmission elements of the first port to the receiving element of the third port;
• at least a second signal is transmitted along at least a third network path from the at least two transmission elements of the second port to the receiving element of the fourth port;
• the second signal is transmitted along at least a fourth network path from the at least two transmission elements of the second port to the receiving element of the third port;
• a first weight is applied to at least one of the at least two transmission elements of the first port, wherein the weight modifies the first signal transmitted along the second network path to the receiving element of the third port to cancel signal interference caused by the first signal at the third port during full duplex operation of the network array;
• and
• a second weight is applied to at least one of the at least two transmission elements of the second port, wherein the weight modifies the second signal transmitted along the fourth network path to the receiving element of the fourth port to cancel signal interference caused by the second signal at the fourth port during full duplex operation of the network array.

A method of self-interference cancellation using a full duplex adaptive array, the method comprising:

• providing at least four ports within a network array, wherein at least two transmission elements are at a first port, at least two transmission elements are at a second port, at least one receiving element is at a third port, and at least one receiving element is at a fourth port, and wherein a plurality of network paths are connected between transmission elements and receiving elements in the network array;
• transmitting at least one signal along at least a first network path from the at least two transmission elements of the first port to the receiving element of the fourth port;
• transmitting the at least one signal along at least a second network path from the at least two transmission elements of the first port to the receiving element of the third port;
• and
• adaptively applying a weight to at least one of the at least two transmission elements of the first port, wherein the weight is applied relative to a frequency of the at least one signal, the weight being calculated based on a measured self-interference of the at least one signal determined from a difference between a transmit power and a noise power of the at least one signal, whereby the weight modifies the at least one signal transmitted along the second network path to the receiving element of the third port to cancel signal interference caused by the at least one signal at the third port during full duplex operation of the network array.