Code division techniques in large capacity mobile radio communication systems
Abstract
The potential of spread spectrum systems (SS) is discussed and two particular configurations are compared: frequency hopping differential phase shift keying (FH-DPSK) and frequency hopping frequency shift keying (FH-FSK). The FH-FSK system uses multilevel FSK coding and presents a spectral efficiency considerably better than that of the FH-DPSK system. The bit error rate in relation to the number of simultaneous users is also better in the FSK system. The protection ratio in the SS systems is also better than in the FM systems.
- Publication:
-
In Fond. Ugo Bordoni Terrest. Mobile Radio Serv.
- Pub Date:
- 1981
- Bibcode:
- 1981fubt.rept..103F
- Keywords:
-
- Communication Networks;
- Phase Shift Keying;
- Radio Communication;
- Spread Spectrum Transmission;
- Code Division Multiplexing;
- Digital Techniques;
- Frequency Hopping;
- Radio Transmission;
- Signal To Noise Ratios;
- Communications and Radar