Communications Hardware for a UAV Sensor Network ECE 791- Oral Project Proposal ECE Faculty Advisor: Nicholas Kirsch Ph.D.
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1 Communications Hardware for a UAV Sensor Network ECE 791- Oral Project Proposal ECE Faculty Advisor: Nicholas Kirsch Ph.D. October 28, 2011 Presented By: Jason Dusseault, Matthew Gloekler, Andrew Jacobs, Benjamin Payeur Background Problem Statement Goals Design Objectives Implementation Budget Timeline Content 1
2 Background Overview Why use drones? Time Money Terrain Search area Strategy Multi-disciplinary / Multi University WPI Teams: Platform Development, Systems Integration, Communications Team Background UNH Communication Team FPGA Radio front end Communication Link Software Controlled Radio Connect drones to command center Data filtered, processed Control drones through command center 2
3 Problem Statement We are developing communications hardware for a UAV. The communications hardware has to meet size and weight constraints for the UAV. To consider this project as a success, our communications hardware should be able to transmit over 50 meters to a N210 radio. Main Goal Goals Construct a network capable of working 50m above earth Be able to receive sensor data Be able to send flight commands to the UAV Design a micro strip patch antenna for the mother ship 3
4 Main Goal Secondary Goals Goals (continued) Construct a lower power radio to allow drones to communicate to the mother ship Have sensor data sent to the mother ship and then transmitted back to the ground station Receive flight instructions which are relayed through the mother ship 4
5 Design Overview Goal is to create a wireless UAV network Two way communication (transceivers at both ends) between ground station and UAV Will be implemented with a SDR, based on Ettus N210 Primary goal of the system will be search and rescue Power Managment Two different planes with different power considerations. (Penguin B, Senior telemaster) Ways to reduce power consumption, if needed: reduce bandwidth, choose less powerful FPGA, reduce signal power. Tradeoffs of reducing power consumption 5
6 Communication Communication frequency needs to be picked that will not violate FCC regulations Look angle between mother ship and drones; mother ship and ground station Bandwidth Better image quality requires a higher bit rate Modulation rate: M-ary QAM used to send more information at once Signal to noise ratio limits the number of symbols that can be used in M-ary QAM 6
7 Weight Considerations Senior Telemaster: 10 pound payload Penguin B: 15 pound payload Implementation 7
8 Implementation Link Budget Accounting of the gains and losses 8
9 Implementation Budget Item Quantity Price Total Cost Antenna Antenna 1 $25.00 $25.00 Front End Modulator/ Detector 1 $6.00 $12.00 High Accuracy Adjustable low dropout regulator 4 $1.00 $4.00 Digital Attenuator 1 $5.00 $5.00 Ultra Low distortion differential ADC Driver 2 $5.00 $10.00 Quadrature Demodulator (50MHz-2GHz) 1 $6.00 $6.00 Wideband Synthesizer with VCO 2 $8.00 $16.00 EEPROM 2 $10.00 $20.00 Connection Header Hi-Speed dual 40POS 1 $8.00 $8.00 Miscellaneous 1 $50.00 $50.00 FPGA FPGA 1 $86.32 $86.32 Gigabit Ethernet Transceiver 1 $3.59 $3.59 Fuse: 1 Port, right angle 1 $3.83 $3.83 RAM from Cypress Semiconductor, 2.5 V 1 $11.32 $ V to 20V input to variable voltage, 3A output buck converter 3 $6.30 $18.90 Voltage Controlled, Temperature Compensated Crystal Oscillator, part # unknown Matched input connector - might be used to probe board? Officical part number not on schematic Transceiver, exact part number or brand not known 1 Misc Miscellaneous parts: capacitors, resistors, inductors, connectors, etc Misc $50.00 PCB Fabrication $ Total $ Misc Misc 9
10 Timeline Determine Constraints Design System Board Layout Fabricate Measure Integrate with FPGA and fabricate Determine Constraints Design System Layout Integrate with front end and fabricate Test and measure Progress Report URC Final Report 10/17/ /21/ /26/2011 1/30/2012 3/5/2012 4/9/2012 5/14/2012 Front End FPGA Reporting References Ettus Research LLC. Web. 25 Oct < "Radio Link Budget :: Radio-Electronics.Com." Radio- Electronics.com: Resources and Analysis for Electronics Engineers. Web. 23 Oct < 10
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