![Millimeter waves
Why?
1. Global bandwidth shortage facing wireless
carriers
2. 5G future applications
Differences
1. Larger communication bandwidths
2. Narrower beamwidths
3. Multi Gb/s
What?
Mm-waves refers to the frequency spectrum [30,300] GHz,
corresponding to wavelength of 10 to 1 mm.
Thus the mm-wave spectrum lies between the microwaves and infrared portions.
Relazione: 𝜆*f=c](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
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Open Source SDR Frontend and Measurements for 60-GHz Wireless Experimentation
- 1. Open Source SDR Frontend and Measurements for 60-GHz Wireless Experimentation Laureando: Andrea Driutti Relatore: Prof. Massimiliano Comisso Anno accademico 2019-2020 Dipartimento di Ingegneria e Architettura Corso di Laurea Triennale in Ingegneria Elettronica e Informatica Curriculum Elettronica Autori: Per Zetterberg, Ramin Fardi Informazioni di pubblicazione: IEEE Access, March 30, 2015
- 2. Millimeter waves Why? 1. Global bandwidth shortage facing wireless carriers 2. 5G future applications Differences 1. Larger communication bandwidths 2. Narrower beamwidths 3. Multi Gb/s What? Mm-waves refers to the frequency spectrum [30,300] GHz, corresponding to wavelength of 10 to 1 mm. Thus the mm-wave spectrum lies between the microwaves and infrared portions. Relazione: 𝜆*f=c
- 3. Main goal Experimentations in the 60-GHz wireless band How? Open Source SDR front-end design model that encourages open collaboration radio devices based on software instead of hardware (USRP) Universal Software Radio Peripheral (USRP N210) User-program interface
- 4. Differences with other platforms Disadvantages 1. indirect observation of the communication channel (throughput or RSSI) 2. not much experimentation on new interfaces Open Source SDR Frontend design Schematics, software Hittite chips, FR4 SECTIONS 1. The front-end 2. Connection to USRP and other platforms 3. Beamsteering 4. Measurements
- 5. 1. The front-end Target Furnish specific details on the PCB Design • TX Board • RX Board • CLK Board TX Board
- 6. USRP N210 How? Through BasicRX and BasicTX boards Hardware TX-BasicTX and RX-BasicRX Software C++ classes, Matlab/Octave functions 2. Connection to USRP and other platforms OTHER PLATFORMS Vector signal generator + spectrum analyzer
- 7. What? It means changing the direction of the main lobe (which contains the higher power) to serve different users 3a. Beamsteering Antenna beams (normal behaviour) Problem Small size of the board (sidelobes ≅ mainlobes) How? Switching antenna elements Changing phases of RF signals
- 8. Solution Boards with multiple chips or connected to an external antenna 3b. Beamsteering
- 9. 4. Measurements Why? To characterize the performance of the platform in different scenarios Which? 1. Transmit power 2. Receiver sensitivity 3. Carriage leakage 4. Phase noise 5. MIMO 2x2 Power received by the spectrum analyzer
- 10. Conclusion Open resources • Software • Measurements and instructions • Hardware design files • Files to control the board Main utilization • Demonstrate the usefulness of algorithms • Proof of concept demonstrations