Dynamic space division duplex (sdd) wireless communications with multiple antennas using self interference cancellation

摘要

A system and method to perform Full Duplex FD Space Division Duplex SDD communication using a Self Interference Cancelling SIC precoder (110) that applies different antenna phase shifts and amplitude scales to the transmitted signals to force them to be in the null space of (he selected receive antennas (83-86). Thus a wireless communication unit (175, 185) can place nulls at each of its receive antennas digitally at baseband for one or more frequency bands. The SIC precoder (110) may be computed based on the self interference channel from the transmit chains to the receive chains. Different SIC precoders may be adaptively selected and stored digitally for different frequency bands. Subsequent single or multi user precode can be applied in concatenation with the SIC precoder to transmit signals to one or more users while receiving signals from one or more users simultaneously over the same frequency band.