Chapter 11 Other Wireless Systems

11.1 Radio Navigation and GPS

1) Loran-C

Principles:

- 90-110 kHz

- Ground wave propagation

- Three or more stations

2) GPS (Global Positioning System)

- GPS satellite: 20,180 km, 31 satellites in orbit, 3.9 km/s, 12-h period

- GPS: USA

- Galileo: EU

- GLONASS: Russia

- Beidu: China

- QZSS: Japan

11.2 Motor Vehicle and Highway Applications

11.3 DBS (Direct Broadcast Satellite Systems)

- DBS satellite: geostationary, 35,700 km

11.4 RFID (Radio Frequency Identification Systems)

NFC: 13.56 MHz, bus card

UHF RFID: 915 MHz

11.5 Remote Sensing Systems and Radiometers

11.6 Surveillance and Electronic Warfare Systems

Figure: SAAB Erieye 2000 AEW&C

Figure: Boeing 737 AEW&C

Figure: USAF RC-135 Rivet Joint