System Level Modeling and Optimization of the LTE Downlink
System Level Modeling and Optimization of the LTE Downlink
System Level Modeling and Optimization of the LTE Downlink
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ContentsContents1 Motivation <strong>and</strong> Scope <strong>of</strong> Work 11.1 Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31.2 List <strong>of</strong> Related Publications . . . . . . . . . . . . . . . . . . . . . . . 72 3GPP Long Term Evolution 92.1 Network Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . 112.2 <strong>LTE</strong> Physical Layer . . . . . . . . . . . . . . . . . . . . . . . . . . . 142.2.1 MIMO Transmission . . . . . . . . . . . . . . . . . . . . . . . 152.2.1.1 Transmit Diversity . . . . . . . . . . . . . . . . . . . 162.2.1.2 Open Loop Spatial Multiplexing . . . . . . . . . . . 162.2.1.3 Closed Loop Spatial Multiplexing . . . . . . . . . . 172.2.2 Layer-to-Codeword Mapping . . . . . . . . . . . . . . . . . . 172.2.3 Channel Coding . . . . . . . . . . . . . . . . . . . . . . . . . 182.2.4 Channel Adaptive Feedback . . . . . . . . . . . . . . . . . . . 192.2.4.1 Channel Quality Indicator Feedback . . . . . . . . . 192.2.4.2 Precoding Matrix <strong>and</strong> Rank Feedback . . . . . . . . 202.3 MAC Layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213 Physical Layer <strong>Modeling</strong> <strong>and</strong> <strong>LTE</strong> <strong>System</strong> <strong>Level</strong> Simulation 233.1 <strong>System</strong> Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243.1.1 Link Quality Model . . . . . . . . . . . . . . . . . . . . . . . 283.1.1.1 Post-equalization SINR <strong>and</strong> Trace Generation . . . 293.1.1.2 On <strong>the</strong> <strong>Modeling</strong> <strong>of</strong> OLSM <strong>and</strong> Block Fading . . . . 313.1.1.3 Channel Trace Generation . . . . . . . . . . . . . . 323.1.1.4 Macro-scale Fading . . . . . . . . . . . . . . . . . . 343.1.1.5 Shadow Fading . . . . . . . . . . . . . . . . . . . . . 363.1.2 Link Performance Model . . . . . . . . . . . . . . . . . . . . . 38vii