Preliminary Design Report GPS Location System

Introduction GPS COMM Group Team Members Adam Preeo Adrian Migacz Andy Merritt Taylor Hughes

Adam Preeo Power lab GPS user Project work – Transceiver and LCD

Adrian Migacz Only ECE member of the group Computer Architecture, Programming Languages etc. Enjoys playing sports

Andy Merritt National Center for Atmospheric Research Communication Theory Working on GPS and Transceiver hardware

Taylor Hughes Work at Avaya in Westminster Software Integration and Testing Database/Web Administrator Testing Automation Familiar with Matlab Software Will be used for some calculations and mapping

Function and Uses Handheld GPS unit with a display that communicates with a base station. Communication and Location technology consolidated into one handheld unit Group outdoor activities Outdoor Recreation Field Research teams Family vacations Military Operations

GPS System Diagram GPS Unit GPS Receiver Data Translators Transmitter/Receiver LCD Screen Base Station Laptop Computer Data Processor Transmitter/Receiver

Field Unit Diagram GPS Receiver Data Translator Transmitter /Receiver Data Translator LCD Screen Wireless Link To Base Station

Base Station Diagram Receiver Data Processor Transmitter Laptop Station Serial Connection From Field Unit To Field Unit GPS Receiver

Project Goals Baseline Goals: Field Unit to Base Station communication Show coordinates, distance, and bearing to the Base Station on the Field unit Extensions: Use Multiple Field units Display multiple locations on Field unit Use graphic display instead of text

Division of Labor Laptop Station – Taylor Hughes Data Processor – Adrian Migacz Transmitters/Receivers – Andy Merritt and Adam Preeo Data Translators – Adam Preeo and Adrian Migacz GPS Receivers – Andy Merritt LCD Screens – Taylor Hughes and Adam Preeo

Base Station Diagram Receiver Data Processor Transmitter Laptop Station Serial Connection From Field Unit To Field Unit GPS Receiver

Laptop Station Components: Laptop Computer RS232 Serial Connection to Data Processor Delorme Topo Software GPS Receiver (included with Topo Software) Matlab Software

Laptop Station Components Laptop Computer Delorme Topo Software Includes Interface with GPS receiver Used to retrieve GPS coordinates of laptop computer for comparison with those of the Field unit.

Laptop Station Components Laptop Computer Matlab Software Used for advanced data calculations and triangulation of coordinates. Used for RS232 communications to data processor Used to map relative positions of GPS coordinates

Laptop Station Components RS232 Interface Connects laptop computer to Data Processor Used to receive coordinates of the field GPS unit from data processor. Used to send calculated data for eventual display on LCD screen on field unit.

Base Station Diagram Receiver Data Processor Transmitter Laptop Station Serial Connection From Field Unit To Field Unit GPS Receiver

Data Processor Motorola Processor & Compiler -used to calculate the distance between two GPS coordinates -calculate the bearing from North of where the LCD unit is located

Field Unit Diagram GPS Receiver Data Translator Transmitter /Receiver Data Translator LCD Screen Wireless Link To Base Station

Data Translator Microcontroller for LCD provide “smarts” -gather data for the LCD so it can display the coordinates -Motorola HC12 and developing board with memory

Base Station Diagram Receiver Data Processor Transmitter Laptop Station Serial Connection From Field Unit To Field Unit GPS Receiver

Field Unit Diagram GPS Receiver Data Translator Transmitter /Receiver Data Translator LCD Screen Wireless Link To Base Station

Transceiver North American Radio Solutions Cost: $40 Serial Interface Simple Short range 500m

Field Unit Diagram GPS Receiver Data Translator Transmitter /Receiver Data Translator LCD Screen Wireless Link To Base Station

GPS Receiver Cost: $119 Serial Interface Excellent for outdoor environment Urban Canyons Dense Foliage

Field Unit Diagram GPS Receiver Data Translator Transmitter /Receiver Data Translator LCD Screen Wireless Link To Base Station

LCD Screen Crystal fonts – 4x20 Serial Alphanumeric LCD Character only display Serial interface Programmable by any language Scrolling text The Price is Right

Risks & Contingency Plans 1. LCD Display (Character vs. Graphics Display) - ideally use Graphics, else use Character 2. Not being able to configure LCD at all -use a laptop for the portable unit 3. RF issues - FCC, bandwidth-gain, range

Risks & Contingency Cont. 4. Power Issues - portable power supplies for units, battery-powered 5. Problems w/ Interfacing all components - intermediary components to fix problems

Schedule

Preliminary User’s Manual Uses Startup directions How to read the display High level description of how the product functions Trouble Shooting section

Summary Function Uses Components Risks What the end user can expect

Questions