Contributions for 5G Development at Brazil May 22 nd 2018 Dr. Henry Douglas Rodrigues
Agenda • Motivations for 5G • Inatel Contributions for 5G • Demos and Performance • Future Work • Conclusions
Motivations
Motivations – 5G Scenarios massive Ultra‐Reliable Machine‐Type Low‐Latency Communication (URLL) (mMTC)
Motivations – 5G Scenarios Peak Rate > 20 Gbps URLL Latency < 1ms Coverage radius >= 50 km Internet Access mMTC for Remote Connections per cell Areas (IARA) > 100k
Motivations – Remote Areas Applications Huge social impacts: • 3.9 billion people are unconnected Smart farms: • Farms automation • Machinery control • Environment and cattle monitoring Road coverage: • Entertainment • Vehicle‐to‐infrastructure (V2I)
Inatel Contributions for 5G
Inatel Contributions for 5G • Centro de Referência em Radiocomunicações ( ) • Flexible reference model: 5G transceiver • Comply with specific requirements for Remote Area scenario • Produce knowledge • Training for professionals
5G Flexible Transceiver • New Waveform: • Low out‐of‐band emissions • Flexible to cover different scenarios • Main Technologies: • Polar coding • 2x2 MIMO for diversity • Hardware: • 100% real‐time operation • FDD (Frequency Division Duplexing) • Scalable bandwidth Software Defined Radio
Motivations for new waveforms • Problem: Energy and Spectral Efficiency CP wastes energy and throughput! OFDM CP CP OFDM CP OFDM What if we can have a modulation scheme that needs What if we can have a modulation scheme that needs CP protects the data from the channel only one CP for several subsymbols? only one CP for several subsymbols? Subsymbol Subsymbol CP Subsymbol Resource saved by efficient use of the CP CP waste of energy and bandwidth can be CP waste of energy and bandwidth can be significantly reduced. significantly reduced.
Motivations for new waveforms • Proble: High energy leakage (Cognitive Radio) No interference Very strong Primary Primary interference User User Huge energy Zero energy Leakage … leakage… What if we can have a modulation scheme that has a What if we can have a modulation scheme that has a smooth pulse shape with virtually zero energy leakage ? smooth pulse shape with virtually zero energy leakage ? frequency … because of the … caused by bad smooth pulses. filter shape. time The ability to control the pulse‐shape allows the The ability to control the pulse‐shape allows the co‐existence with other technologies. co‐existence with other technologies.
5G GFDM Transceiver Block Diagram Transmitter PA Rate Rate Channel Channel GFDM GFDM TR‐STC TR‐STC CP/CS CP/CS Digital Pre‐ Digital Pre‐ TX TX Frame Frame Front‐end Front‐end Adaption Adaption encoder encoder Modulador Modulador Encoder Encoder windowing windowing Structure Structure Distortion Distortion PA Synchronization Synchronization Ethernet Ethernet Packet Packet Signal Signal RX RX Interface Interface Tunneling Tunneling Front‐end Front‐end PRBS PRBS Channel Channel data data Estimation Signal Estimation Signal Receiver Time & Time & RX RX Impairments Impairments ST Decoder ST Decoder Channel Channel Automatic Automatic Channel Channel GFDM GFDM Carrier Offset Carrier Offset Front‐end Front‐end Auto‐correction Auto‐correction Gain Control Gain Control Estimation Estimation Equalization Equalization Demodulator Demodulator Decoder Decoder Synch. Synch. Channel Channel Packet De‐ Packet De‐ Ethernet Ethernet Synchronization Synchronization FPGA (USRP Rio) Estimation Estimation tunneling tunneling Interface Interface Signal Signal Host (Windows PC) Stuffing Stuffing Signal Signal Removal Removal Software Defined Radio BER BER External Hardware Meas. Meas.
5G Transceiver System – Base Station
Coexistence with Digital TV in UHF band ISDB‐T OFDM GFDM frequency
Coexistence with Digital TV in UHF band
Demos and Performance
Inatel Campus – March 2017 Inatel Campus @ Santa Rita do Sapucaí, Minas Gerais, Brazil
International Award – June 2017 Grand @ Oulu, Finland Challenge
Brasília – August 2017 5G Base Station 5G Mobile Station
Demo @ Brasília – August 2017
Preliminary Field Tests – June 2018 Under evaluation: • Coverage • Throughput • Robustness (MIMO and Polar Coding) • Channel model • Legacy compatibility (interference)
Performance Analysis @ Lab • Goal: how much do we Noisy channel lose, due to estimation implementation? • AWGN Channel Implementation • 64QAM, Polar 3/4 loss
Future Work
Evolution Roadmap Definition of 5G Control and Prototypes for Network Resource each scenario Architecture Allocation Future Today Solutions for 5G 5G 5G Irradiating Massive MIMO Transceiver Network Network Systems Definition of PHY Definition of PHY Coordinated and MAC and MAC Multipoint technologies technologies
Conclusions
Conclusions • Huge demand for providing connectivity for rural areas • 5G Networks can be the final solution for delivering Internet access everywhere • Current technology can create new business model and economic feasible solutions for remote are coverage
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