Content for TR 45.912 Word version: 16.0.0
8 Higher Order Modulation and Turbo Codes
8.1 Introduction
8.2 Concept Description
8.3 Modelling Assumptions and Requirements
8.4 Performance Characterization
8.5 Symbol Mapping of Turbo Coded Bits
8.6 Higher Order Modulation, Turbo Codes Combined with MS Receiver Diversity
8.7 Modified 16-ary Constellations for Higher Order Modulation and Turbo Coding Schemes
8.7a Blind modulation detection performance
8.7b Impact of using higher order modulations on the BCCH carrier
8.7c Multiplexing higher order modulation MS with legacy MS
8.8 Incremental Redundancy for Higher Order Modulation and Turbo Coding Schemes (HOMTC)
8.8a Modulation Order and symbol Rate Enhancement (MORE) [48]
8.9 Implementation Impact
8.9a Implementation Aspects of MORE
8.10 Impacts on the Specifications
8.11 References
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8 Higher Order Modulation and Turbo Codes Word‑p. 114
8.1 Introduction
8.2 Concept Description
8.2.1 Higher Order Modulations
8.2.1.1 Square 16QAM Modulation
8.2.1.2 Other 16-ary Modulations Word‑p. 116
8.2.1.3 32QAM Modulation
8.2.2 Channel Coding Word‑p. 117
8.2.3 Symbol Mapping and Interleaving
8.2.4 Header Block
8.2.5 USF Signaling
8.2.6 Link Adaptation
8.2.7 Incremental Redundancy Combining
8.2.8 Multislot Classes
8.2.9 Non-core Components Word‑p. 118
8.3 Modelling Assumptions and Requirements
8.4 Performance Characterization
8.4.1 Implementation Set A
8.4.1.1 Modelling assumptions and requirements
8.4.1.2 Comparison of BLER Performance
8.4.1.3 Link Performance with Link Adaptation Word‑p. 122
8.4.1.4 System Simulation Results Word‑p. 123
8.4.2 Implementation B Word‑p. 126
8.4.2.1 Introduction
8.4.2.2 Basic Link Layer Performance
8.4.2.3 Impact of Frequency Hopping
8.4.2.4 Impact of Incremental Redundancy Word‑p. 130
8.4.2.5 Impact of Propagation Environment Word‑p. 131
8.4.2.6 Impact of RX and TX Impairments
8.4.2.7 Impact of RRC Pulse Shaping Word‑p. 133
8.4.2.8 Evaluation of Performance Word‑p. 134
8.4.3 Implementation C Word‑p. 135
8.4.3.1 Channel coding
8.4.3.1.1 EGPRS
8.4.3.1.2 Convolutional Codes with 16QAM
8.4.3.1.3 Turbo Codes with 8-PSK Modulation
8.4.3.1.4 Turbo Codes with 16QAM Modulation Word‑p. 136
8.4.3.2 Modulation
8.4.3.3 Pulse Shaping
8.4.3.4 Link performance Evaluation
8.4.3.5 Link-to-system Interface Word‑p. 138
8.4.3.6 System Level Results
8.4.3.6.1 Simulation Assumptions
8.4.3.6.2 Results Word‑p. 139
8.4.3.7 Increased Peak Throughput with 16QAM and Turbo Codes Word‑p. 149
8.4.3.7.1 Modulation, Coding and Interleaving
8.4.3.7.2 Link Performance Word‑p. 150
8.4.3.7.3 System Performance Word‑p. 153
8.4.3.8 16QAM with Alternative Transmit Pulse Shaping Word‑p. 155
8.4.3.9 Higher order modulation than 16-QAM
8.4.3.9.1 Modulation, coding and interleaving
8.4.3.9.2 Interference Rejection Combining, IRC Word‑p. 160
8.4.3.9.3 Results Word‑p. 161
8.4.3.10 Comparison between DFSE and RSSE Performance Word‑p. 168
8.4.3.11 Discussion Word‑p. 169
8.4.4 Implementation Set D Word‑p. 170
8.4.4.1 Performance Characterisation
8.4.4.1.1 Uncoded BER Performance
8.4.4.1.2 BLER Performance of Turbo Coding with 8PSK Word‑p. 171
8.4.4.1.3 BLER Performance of Turbo Coding with 16QAM Word‑p. 172
8.4.4.1.4 Comparison to Ericsson Results Word‑p. 173
8.4.4.1.5 Graphs for Co-Channel Interferer Case (TU3iFH) Word‑p. 174
8.4.4.1.6 Graphs for Sensitivity Limited Case (TU3iFH) Word‑p. 178
8.4.4.1.7 Throughput Performance Gain Word‑p. 181
8.4.4.1.8 Number of Turbo Decoding Iterations Word‑p. 193
8.4.4.1.9 Improved Cell Edge Performance Word‑p. 195
8.4.4.1.10 System Performance Word‑p. 198
8.4.4.1.11 32QAM Modulation Word‑p. 199
8.4.4.2 Comparison of Different Coding Configurations for Higher Order Modulation and Turbo Coding Schemes Word‑p. 209
8.4.4.2.1 HOMTC Coding Scheme Configurations
8.4.4.2.2 Performance Characterization Word‑p. 210
8.4.4.2.3 Discussion Word‑p. 213
8.4.4.3 Impact of Blind Modulation Detection
8.5 Symbol Mapping of Turbo Coded Bits
8.5.1 Symbol mapping for 16-QAM Modulation Word‑p. 215
8.5.2 Performance Evaluation Word‑p. 218
8.6 Higher Order Modulation, Turbo Codes Combined with MS Receiver Diversity
8.7 Modified 16-ary Constellations for Higher Order Modulation and Turbo Coding Schemes
8.7.1 Introduction
8.7.2 Circular 16APK Constellations
8.7.2.1 PAPR and Dynamic Range Comparison Word‑p. 223
8.7.3 Logical Channel Configurations Word‑p. 224
8.7.4 Performance Characterisation
8.7a Blind modulation detection performance Word‑p. 229
8.7a.1 Introduction
8.7a.2 Blind modulation detection Word‑p. 230
8.7a.3 Simulation conditions
8.7a.4 Results Word‑p. 231
8.7a.4.1 Single-antenna receiver
8.7a.4.2 Dual-antenna receiver (maximum ratio combining)
8.7a.4.3 Dual-antenna receiver (interference cancellation)
8.7a.5 Discussion Word‑p. 232
8.7b Impact of using higher order modulations on the BCCH carrier
8.7b.1 Introduction
8.7b.2 Impact on cell selection and reselection
8.7b.3 Impact on GPRS/EGPRS MS open loop power control Word‑p. 235
8.7c Multiplexing higher order modulation MS with legacy MS Word‑p. 236
8.7c.1 Introduction
8.7c.2 Background and problem description
8.7c.3 Simulation setup
8.7c.3.1 Simulator description
8.7c.3.2 Scheduling strategies Word‑p. 237
8.7c.3.3 Performance measure
8.7c.3.4 MS capabilities and MCS selection
8.7c.4 Results and discussion Word‑p. 238
8.8 Incremental Redundancy for Higher Order Modulation and Turbo Coding Schemes (HOMTC)
8.8a Modulation Order and symbol Rate Enhancement (MORE) [48]
8.8a.1 Concept Description
8.8a.2 Discussion of the Concept
8.8a.2.1 Benefits
8.8a.2.2 Drawbacks Word‑p. 250
8.8a.3 Performance Estimation
8.9 Implementation Impact Word‑p. 252
8.9.1 Impacts on the Mobile Station
8.9.2 Impacts on the BSS
8.9.3 Impacts on the Core Network Word‑p. 253
8.9a Implementation Aspects of MORE
8.10 Impacts on the Specifications
8.11 References Word‑p. 254
