Transcript Communications Hardware for a UAV Sensor Network ECE 791

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
Content
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Background
Problem Statement
Goals
Design Objectives
Implementation
Budget
Timeline
Background
• Overview
• Why use drones?
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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
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.
Goals
• Main Goal
– 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
Main Goal
Goals (continued)
• Secondary Goals
– 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
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
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
Weight Considerations
• Senior Telemaster: 10 pound payload
• Penguin B: 15 pound payload
Implementation
Implementation
Link Budget
• Accounting of the gains and losses
Implementation
Budget
Item
Quantity
Price
Total Cost
1
$25.00
$25.00
1
$6.00
$12.00
High Accuracy Adjustable low dropout regulator
Digital Attenuator
4
1
$1.00
$5.00
$4.00
$5.00
Ultra Low distortion differential ADC Driver
2
$5.00
$10.00
Quadrature Demodulator (50MHz-2GHz)
Wideband Synthesizer with VCO
EEPROM
Connection Header Hi-Speed dual 40POS
Miscellaneous
FPGA
FPGA
Gigabit Ethernet Transceiver
Fuse: 1 Port, right angle
1
2
2
1
1
$6.00
$8.00
$10.00
$8.00
$50.00
$6.00
$16.00
$20.00
$8.00
$50.00
1
1
1
$86.32
$3.59
$3.83
$86.32
$3.59
$3.83
RAM from Cypress Semiconductor, 2.5 V
1
$11.32
$11.32
4.5V to 20V input to variable voltage, 3A output buck converter
3
$6.30
$18.90
Antenna
Antenna
Front End
Modulator/ Detector
Voltage Controlled, Temperature Compensated Crystal Oscillator, part # unknown
Misc
Matched input connector - might be used to probe board? Officical part number
not on schematic
Misc
Transceiver, exact part number or brand not known
Miscellaneous parts: capacitors, resistors, inductors, connectors, etc
PCB Fabrication
1
Misc
Misc
Total
$50.00
$100.00
$430.00
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
10/17/2011
11/21/2011
12/26/2011
Front End
1/30/2012
FPGA
3/5/2012
Reporting
4/9/2012
5/14/2012
References
Ettus Research LLC. Web. 25 Oct. 2011.
<http://www.ettus.com/>
"Radio Link Budget :: Radio-Electronics.Com." RadioElectronics.com: Resources and Analysis for Electronics
Engineers. Web. 23 Oct. 2011. <http://www.radioelectronics.com/info/propagation/path-loss/link-budgetcalculation-formula-equation.php>.