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In this paper we present a survey based on vast res earch done in the area of various important factors relating to full duplex communication revealing several facts. In fact thes e revelation has served to be vital in the future d esign of any full duplex communication system . The major problem or challen ge faced in such a system was the interference caus ed from the transmitting antenna on the receiver antenna placed at the same node. The interference was termed as ' self interfe rence'. Wireless transceivers nodes can select between transmit and receive funct ions on the same frequency band at different time ( Time Division Duplex-TDD) or they can transmit at the same time at different frequencies ( Frequency Division Duplex-FDD). Recen tly researchers have put forth a new radio system, that can operate full duplex ov er a single channel , that is transmitting and rec eiving at the same time on the same frequency band. This kind of system is overwhe lmed by interference. Interference need to be redu ced to the point where the receiver can detect even the weakest signal of inte rest. Several active interference cancellation tech niques that can help in self interference reduction have been proposed. The in d epth survey was helpful enough to come out with a n ovel solution to an antenna design based on passive suppression techniques usin g polarization and other diversity techniques so a s to reduce the self interference problem.

ACTIVE SELF INTERFERENCE CANCELLATION TECHNIQUES IN FULL DUPLEX COMMUNICATION SYSTEMS - A SURVEY