Architecture for cancelling self interference and enabling full duplex communications

A method of cancelling self-interference in a wireless communication system, the method comprising:

• placing, in a wireless communications system, a first antenna and a second antenna, wherein the first antenna and the second antenna are each configured to perform simultaneous transmission and reception;
• configuring a transmission from the first antenna and a reception from the second antenna in a same first frequency band;
• and
• configuring a transmission from the second antenna and a reception from the first antenna in a same second frequency band.

A system for cancelling self-interference in a wireless communication system, the system comprising:

• a first set of antennas, wherein the first set of antennas includes a plurality of directional antenna elements in a node;
• and
• a second set of antennas, wherein the second set of antennas includes at least one omni-directional antenna in the node,
• wherein the first set of antennas are configured to cooperatively transmit or receive and are placed such that they form an omni-directional antenna pattern while generating an isolated null region wherein the at least one omni-directional antenna is used for reception or transmission.