Apparatus and method for spatial division duplex (SDD) for millimeter wave communication system

A Spatial Division Duple (SDD) mobile communication system using millimeter waves, the SDD mobile communication system comprising:

• a first wireless terminal comprising:
• a first transmit antenna array having a plurality of first transmit antennas configured to transmit a spatially beamformed first transmit beam;
• and
• a first receive antenna array having a plurality of first receive antennas configured to form a spatially beamformed first receive beam,
• wherein the first transmit antenna array and the first receive array are spatially configured by jointly selected transmit and receive beamforming weights;
• and
• a second wireless terminal comprising:
• a second transmit antenna array having a plurality of second transmit antennas configured to transmit a spatially beamformed second transmit beam directed towards a receive beam of the first wireless terminal;
• and
• a second receive antenna array having a plurality of second receive antennas configured to form a spatially beamformed second receive beam directed toward a transmit beam of the first wireless terminal,
• wherein the second transmit antenna array and the second receive antenna array are spatially configured by jointly selected transmit and receive beamforming weights, and
• wherein the first transmit antennas and the first receive antennas use a same frequency and a same timing to simultaneously transmit communication signals of the first transmit beam to the second receive beam and receive communication signals of the second transmit beam at the first receive beam.

A method for Spatial Division Duplex (SDD) mobile communications using millimeter waves, the method comprising:

• forming a first transmit beam using selected ones of a plurality of transmit antennas of a transmit antenna array;
• transmitting a first signal to a first wireless terminal via the first transmit beam according to a predetermined frequency at a predetermined time;
• forming a first receive beam using selected ones of a plurality of receive antennas of a receive antenna array;
• and
• receiving a second signal from a second wireless terminal via the first receive beam according to the predetermined frequency at the predetermined time,
• wherein transmit and receive beamforming weights for each of the first transmit beam and the first receive beam are jointly selected for simultaneously using the predetermined frequency to transmit the first signal via the first transmit beam to a remote terminal and receive the second signal via the receive beam from the remote terminal.