ABSTRACT
Contents 13.1 LTE Physical Layer ........................................................................ 456
13.1.1 Multiplexing Schemes ......................................................... 456 13.1.2 Frame Structure ................................................................. 457 13.1.3 Physical Resource Block ...................................................... 457 13.1.4 Reference Signals ................................................................ 457
13.2 Introduction to Power Control ........................................................ 457 13.3 LTE PUSCH Uplink Power Control ............................................... 461
13.3.1 PUSCH Power Control Signaling ......................................... 461 13.4 LTE Power Control Schemes .......................................................... 462
13.4.1 Power Spectral Density (PSD) .............................................. 462 13.4.2 Conventional Power Control Scheme .................................... 463 13.4.3 Fractional Power Control Scheme ......................................... 464 13.4.4 Slope of the Received PSD ................................................... 465 13.4.5 Open-Loop Power Control .................................................. 466 13.4.6 Closed-Loop Power Control ................................................ 467
13.5 Proposed Closed-Loop Power Control Algorithm .............................. 469 13.5.1 Power Headroom Report ..................................................... 470
13.5.2 Mathematical Model for Setting an SINR Target Based on Path Loss of the Users ............................................ 471
13.5.3 Processing and Round-Trip Time Delay Model ..................... 473 13.5.4 Absolute Open-Loop Error Model ........................................ 474
13.6 Simulation Environment and Results ............................................... 475 13.6.1 Investigation for the Optimal Value of the Path Loss
Compensation Factor .......................................................... 477 13.6.2 Performance Analysis of the Closed-Loop PC
using = 0.8 .................................................................... 479 13.6.3 Ideal Case .......................................................................... 479 13.6.4 Performance Analysis with Absolute Error
and TPC Delay .................................................................. 480 13.6.5 Performance Analysis with the Power
Headroom Report .............................................................. 482 13.6.6 Performance Analysis with Power Headroom Report,
TPC Delay, and Absolute Error ............................................ 484 13.6.7 Power Use ......................................................................... 484
13.7 Conclusions .................................................................................. 485 References .............................................................................................. 486
13.1 LTE Physical Layer 13.1.1 Multiplexing Schemes The capabilities of the evolved NodeB (eNodeB) and user equipment (UE) are obviously quite different; thus, the LTE (long-term evolution) physical layer (PHY), downlink (DL) and uplink (UL) are different.
