Title :
Study on the spectral efficiency of SFH-GMSK in land mobile telephone communication by direct simulation
Author :
Bao, H. ; Kwatra, S.C. ; Kim, Junghwan ; Stevens, G.H.
Author_Institution :
Dept. of Electr. Eng., Toledo Univ., OH, USA
Abstract :
A spread spectrum system, slow frequency hopping with GMSK (Gaussian minimum shift keying) modulation (SFH-GMSK), is proposed for mobile telephone communications. The system performance is evaluated using computer simulation and is compared with an unspread system. Results show that under multipath fading conditions, when the signal-to-noise ratio (SNR) is greater than 15 dB, slow frequency hopping gives some bit error rate improvement over the unspread system. Theoretical predictions indicate that a system efficiency of 20-65 users per cell can be achieved in the cellular configuration. Joint use of SFH-GMSK and FM is also investigated. It is shown that FM interference can cause serious degradation to the SFH-GMSK performance
Keywords :
fading; frequency agility; minimum shift keying; mobile radio systems; radiotelephony; spread spectrum communication; FM interference; Gaussian minimum shift keying; SFH-GMSK; SNR; bit error rate; cellular configuration; land mobile telephone communication; multipath fading conditions; radiotelephony; signal-to-noise ratio; slow frequency hopping; spectral efficiency; spread spectrum system; Bit error rate; Computer simulation; Fading; Frequency modulation; Frequency shift keying; Mobile communication; Signal to noise ratio; Spread spectrum communication; System performance; Telephony;
Conference_Titel :
Global Telecommunications Conference, 1990, and Exhibition. 'Communications: Connecting the Future', GLOBECOM '90., IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
0-87942-632-2
DOI :
10.1109/GLOCOM.1990.116563
