SHARC

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Wireless Radio
SHARC
Design Team Asif Chaudhry (ECE) Pial
Mirdha (ECE) Marcin Strycharz
(ECE) Advisor Professor Rajeev Bansal
(UCONN) Sponsor Rick Silva (NUWC)
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Outline

• Abstract
• Basic Diagram of SHARC
• Purpose
• Possible Application
• Possible Scenario
• Specifications
• Design Alternatives
• Digital Design
• Digital Components
• Analog Design
• Analog Components
• Pros / Cons
• Analog
• Digital
• Budget
• Timeline
• Questions

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ABSTRACTSHARC Surveillance Heightened Acoustic
Radio Communication

• Design and implement a wireless communication
  network consisting of multiple sensors and one
  central receiving node.
• Conduct a comparative study of wireless
  communication components currently available.

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SHARC
Basic Diagram of SHARC
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Purpose

• Many applications in both civilian and military
  environments require multiple sensing devices for
  collecting and monitoring data.
• These sensors should not be made for processing
  the data. Rather the sensors should send the
  data to a central receiving unit whose
  responsibility is to analyze the received
  information.
• This would make the sensors affordable, minimal
  in power consumption, and less complex in design,
  thus making them more deployable.

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Possible Applications

• Military Sensors can be designed to monitor
  acoustic activity near a road of possible enemy
  movement. Because of low power consumption
  numerous sensors can be deployed to monitor large
  areas. The central receiving unit can process the
  data and provide a map of enemy movements.
• Civilian This could be used to monitor your
  property. The receiving unit can alert
  authorities incase fire breaks out or there is
  suspicious activity.

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Applicable Scenario
A Call of Duty scenario with SHARC.
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Specifications

• Transmitter (Sensor)
• Range 0-500 feet to
  central receiver.
• Output Power Less than 300 mW.
• Number of Sensors Minimum of 2
  (expandable to 10).
• Operating Frequency 2.45 GHz.
• Signal Each Signal must be sent
  with a time stamp.
  (Digital)
• Input Data Sound.

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Specifications (cont.)

• Receiver (Central Node)
• Handling Capacity Minimum of 2
  sensors with additional capabilities of
  handling 10 or more sensors
  simultaneously.
• Dynamic Range Signal received
  must have a dynamic range of 60 dB.
• Data Collection Signal taken from each
  sensor must be stored separately and
  there should be a time stamp for
  each signal.

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Design Alternatives

• There are two readily available methods to
  implementing our design.
• Digital - This method involves digital
  communication chipsets which are widely available
  in the market.
• Analog - This method is familiar to us and is
  also much simpler to implement.

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Digital Design
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Digital Design

• Continuous input of sound and mostly noise into
  the microphone.
• When the threshold detector senses a signal above
  threshold it sends a signal to the digital clock
  which sends a digital time stamp out.
• The signal is then digitized using the A/D
  converter. This happens after the time stamp is
  sent out because the A/D converter has an
  inherent delay.
• The signal is sent using the transmitter and is
  received by the receiver on the other end.
• The different signals then goes through a digital
  filter to be separated.
• Once the signals have been separated they are
  stored in a flash memory.
• Also the signal goes through an D/A converter and
  is then outputted to a speaker for verification.

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Typical Digital Components

• Digital Transceiver Aerocomm AC4424
• Interface Data Rate 192 Kbps
• Power Consumption 115/85 mA
• Power Output 10 mW
• Frequency 2.402-2.478 GHz
• Sensitivity -90dB

• Digital Clock DS1689, DS1693
• Operation Power 3,5 V operation
• Kick Start Input (Pulse)
• Square Wave Output

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Analog Design
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Analog Design

• Continuous input into microphone will consist of
  mostly noise and sound.
• Data transmits continuously.
• Each sensor transmits at a slightly different
  frequency in the range of 2.4 GHz.
• At the receiver end multiple filters will
  separate signals coming from each sensor.
• Filtered signal will be outputted to a speaker
  for verification.

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Analog Components

• The following is a mockup of this circuit which
  might be implemented.

• If analog is used we might build our own
  transmitter circuit for the sensors

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Pros / Cons ( Analog SHARC)

• Pro Analog seems more practical and simpler for
  implementation in this project.
• Pro On the receiver side, materials are easily
  built and tested.
• Con Generally less efficient and more error
  prone.
• Con Not easily upgradeable.

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Pros / Cons ( Digital SHARC)

• Pro More efficient than analog in terms of power
  consumption on the output.
• Pro Easily upgradeable, for integration of sound
  and video on the same circuit.
• Con More complex to implement.
• Con Less experience with digital transmission

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Budgetas of 10/27/2005

• Aerocomm AC4424-10 Developer Kit- 199.95
• Aerocomm AC4424-10 Transciver-95.00

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Timeline (Fall 05)
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Timeline (Spring 06)
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Questions / Comments ?
Please visit our website at http//www.engr.uconn
.edu/ece/SeniorDesign/projects/ecesd70/