MIMO Transmission schemes for LTE and HSPA Networks, 3G

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Table of Contents1 TERMINOLOGY ............................................................................................................................................... 42 Executive Summary ....................................................................................................................................... 53 PRINCIPLES ..................................................................................................................................................... 63.1 Multi‐antenna‐transmission basics .........................................................................................................63.1.1 Improving SINR ................................................................................................................................. 63.1.2 Sharing SINR ..................................................................................................................................... 63.1.3 Peak rate or coverage ...................................................................................................................... 83.1.4 Precoding.......................................................................................................................................... 83.1.5 MIMO channel properties affecting the choice of transmission scheme ...................................... 113.1.6 What distinguishes beamforming relative precoding? .................................................................. 133.2 BS ANTENNA CONFIGURATIONS .......................................................................................................... 143.3 UE ANTENNA CONFIGURATIONS ......................................................................................................... 153.3.1 UE Considerations .......................................................................................................................... 153.3.2 Impact of Multiple Antennas on Size ............................................................................................. 173.3.3 Battery Consumption of Multiple Antennas .................................................................................. 173.3.4 Advanced‐Antenna Concepts for UE Application ........................................................................... 184 CURRENT MIMO TRANSMISSION SCHEMES ................................................................................................ 194.1 Introduction to LTE Rel‐8 MIMO Algorithms ....................................................................................... 194.2 DL SU‐MIMO AND Transmit Diversity (TxD) ........................................................................................ 204.2.1 Transmit diversity for two antenna ports ...................................................................................... 204.2.2 Transmit diversity for four antenna ports ...................................................................................... 214.2.3 Precoded spatial multiplexing for LTE ............................................................................................ 214.3 DL‐MIMO in HSPA ................................................................................................................................ 264.4 DL MULTIUSER MIMO .......................................................................................................................... 274.4.1 Single‐layer dedicated beamforming in LTE ................................................................................... 284.5 UL MULTIUSER MIMO .......................................................................................................................... 284.6 ALGORITHM ADAPTATION ................................................................................................................... 305 EMERGING MIMO TRANSMISSION SCHEMES ............................................................................................. 315.1 Downlink Dual‐Layer Beamforming ..................................................................................................... 315.2 Uplink Single‐User MIMO .................................................................................................................... 315.3 Extended Downlink Single‐User MIMO ............................................................................................... 322
5.4 MU‐MIMO ............................................................................................................................................ 325.5 CoMP .................................................................................................................................................... 345.5.1 PRINCIPLE ....................................................................................................................................... 345.5.2 CoMP Architecture ......................................................................................................................... 345.5.3 DL COMP ........................................................................................................................................ 365.5.4 UL COMP ........................................................................................................................................ 376 SYSTEM PERFORMANCE .............................................................................................................................. 376.1 MAPPING MIMO ALGORITHMS TO eNB and UE ANTENNA CONFIGURATIONS .................................. 376.1.1 Algorithm Mappings ....................................................................................................................... 386.2 DL SYSTEM PERFORMANCE ........................................................................................................... 396.2.1 The Baseline Case (1V)................................................................................................................ 396.2.2. OL‐MIMO with DIV Antenna Configurations .............................................................................. 406.2.3. CL‐MIMO with DIV Antenna Configurations............................................................................... 436.2.4. MIMO with ULA‐4V ..................................................................................................................... 456.3 UL SYSTEM PERFORMANCE ........................................................................................................... 466.3.1 The Baseline Case with DIV‐1X ................................................................................................... 466.3.2 UL MU‐MIMO with DIV‐1X ......................................................................................................... 477 Concluding Remarks ................................................................................................................................... 498 REFERENCES ................................................................................................................................................. 509 ACKNOWLEDGEMENTS ................................................................................................................................ 503
Page 4 and 5: 1 TERMINOLOGYIt is assumed that the
Page 6 and 7: 3 PRINCIPLES3.1 MULTI‐ANTENNA‐T
Page 8 and 9: 3.1.3 PEAK RATE OR COVERAGEIn a cel
Page 10 and 11: sufficiently accurate channel infor
Page 12 and 13: Figure 5. Examples of Power Delay P
Page 14 and 15: 3.2 BS ANTENNA CONFIGURATIONSFigure
Page 16 and 17: NOTE:Implementation complexity refe
Page 18 and 19: 3.3.4 ADVANCED‐ANTENNA CONCEPTS F
Page 20 and 21: and interference. By considering th
Page 22 and 23: ank over all the feasible 1 set of
Page 24 and 25: Typically a constant delay increase
Page 26 and 27: the columns of Λ U r rxrfor some o
Page 28 and 29: to blindly estimate this power rati
Page 30 and 31: Figure 16. MMSE Receiver for UL MU-
Page 32: transmitter has information about t
Page 35 and 36: Intra-site CoMPBS3BS2Inter-site CoM
Page 37 and 38: 5.5.4 UL COMPUplink coordinated mul
Page 39 and 40: 6.2 DL SYSTEM PERFORMANCE6.2.1 THE
Page 41 and 42: Compared to baseline, SE gains for
Page 43 and 44: 6.2.3. CL‐MIMO WITH DIV ANTENNA C
Page 45 and 46: 6.2.4. MIMO WITH ULA‐4VWith the U
Page 47 and 48: 0.035Baseline Uplink Cell Edge Sect
Page 49 and 50: 7 CONCLUDING REMARKSThis report pro

MIMO Transmission schemes for LTE and HSPA Networks, 3G

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