3LIMITED FEEDBACK FOR4G ANDBEYOND
STEFAN SCHWARZ
Contents
3.1 CSI Feedback Concepts of 3GPP LTE
3.1.1 LTE’s Physical Layer Signal Processing Architecture
3.1.2 LTE’s Single-User MIMO Transmission Modes
3.1.2.2 Open-Loop Spatial Multiplexing
3.1.2.3 Closed-Loop Spatial Multiplexing
3.1.2.4 Non-Codebook-Based Precoding
3.1.3 Transmission Adaptation and CSI Feedback for Single-User MIMO
3.1.3.1 Instantaneous CQI Feedback
3.1.3.2 Statistical CQI Feedback
3.1.4 Transmission Adaptation and CSI Feedback for Multiuser MIMO
3.1.4.1 Per User Unitary Rate Control
3.1.4.2 Zero-Forcing Beamforming
3.1.5 Performance Comparison of LTE’s MIMO Transmission Modes ...
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