By Chao-Chieh Hsu and Shao-Hsune Lee  , Winter 2002


 

Introduction - Location Manager

3 Phases Overview

 


Phase 1 : Point to Point  Data  transmission Link.

 

                                                

 

    1. System Requirement

1. Requirement

2. Evaluation

2. Building Basic Tx and Rx

1. IC selection  Transmitter ,  Receiver

2. Frequency and distance calculation

3. Crystal and Rx Mode selection

4. Build Tx and Rx Module

5. First test

3. Software Development

1. What should the software do 

2. Use Com Port in Visual Basic

3.  Talk mode and Error test mode

4. Miscellaneous Notes

5. Software Test  1 PC  , 2 PCs

4. Interface and Tx/Rx update

1. Interface   

2. Power integration 

3. 1 PC Tx, Rx Test --> Noise Problem  -->  Double Diodes scheme.

4. 2 PCs test,  Successful but short distance

5. Loop Antenna Configuration

1. 1/2 λ Loop antenna with a compensate inductor

2. Observation: with loop and without loop

6. Dipole Antenna Configuration

1.Polarization Issue

2. Cut the loop

3.Change Loop antenna to Dipole antenna

4.Antenna Test

 7. Field Test (Lab Corridor )

1. Environment

2. Data Transmission: 1200bps & 2400kbps

3. IC-1000 Received Power

4. Analysis

5. Power consumption

8. Conclusion

 9. Schematics and Reference