Study on the spectral efficiency of SFH-GMSK in land mobile telephone communication by direct simulationA 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.
Document ID
19910068553
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Bao, H. (Toledo Univ. OH, United States)
Kwatra, S. C. (Toledo Univ. OH, United States)
Kim, Junghwan (Toledo, University OH, United States)
Stevens, G. H. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1990
Subject Category
Communications And Radar
Meeting Information
Meeting: GLOBECOM ''90 - IEEE Global Telecommunications Conference and Exhibition