Massive_MIMO_ 扫盲.pptx

Note 11. Special Topics:Massive MIMO;Contents;Introduction to Massive MIMO;Introduction to Massive MIMO: Beyond 4G Network;Introduction to Massive MIMO: Candidate of Beyond 4G Network;Introduction to Massive MIMO: Standardization for Massive MIMO;Motivation of Massive MIMO[5] Consider a MIMO MAC ( M : # of BSs antennas, K : # of user) If the BS process its receive signal by matched filtering, By the strong law of large numbers, With an unlimited number of antennas Uncorrelated interference and noise vanish The matched filter is optimal The transmit power can be made arbitrarily small;Introduction to Massive MIMO ;On channel estimation and pilot contamination[5] The receiver estimates the channels based on pilot sequences. The # of orthogonal sequences is limited by the coherence time Thus, the pilot sequences must be reused Assume that transmitter m j use the same pilot sequence Thus, the BS process its receive signal by matched filtering With an unlimited number of antennas Uncorrelated interference, noise and estimation errors vanish The matched filter is optimal The transmit power can be made arbitrarily small[6] The performance is limited by pilot contamination;Analysis of Massive MIMO with sufficient large # of BS antennas Single-cell massive MIMO scenario Massive MIMO Downlink scenario Analysis the performance of various linear precoding/beamforming technique for Massive MIMO based on channel information Perfect CSIT/ imperfect CSIT cases Massive MIMO Uplink scenario Linear receiver technique for Massive MIMO Uplink Perfect CSIR/ imperfect CSIR cases Multi-cell massive MIMO scenario Inter-cell interference problem Pilot contamination problem ;Fundamental Overview: Massive MIMO;Fundamental Overview: Massive MIMO: Point-to-Point MIMO (1/4);Fundamental Overview: Massive MIMO: Point-to-Point MIMO (2/4);Fundamental Overview: Massive MIMO: Point-to-Point MIMO (3/4);Fundamental Overview: Massive MIMO: Point-to-Point MIMO (4/4);Fundamental O