Data transmission analysis in mobile satellite systems

An integrated land mobile satellite system (LMSS) envisions the use of satellites to complement existing/planned terrestrial systems to provide mobile communications to thinly populated and/or large geographical areas. But, established LMSSs can also offer competitive support to users in urban environments by extending services to portable terminals with emphasis in 'hand-held' sizes in the future. A LMSS communicating directly to mobile terminal requires the basic link analysis of small fixed terminal, but will have additional channel characteristics, due to the motion of the terminal. This motion introduces spectral changes in the transmitted waveforms that can provoke further degradations relative to those of fixed-point systems. Hence, attenuations are primarily originated by the time-varying multipaths that appear in trying to transmit an electromagnetic field from a satellite to a moving terminal or vehicle, and by rain effects. Therefore in all LMSSs, the communication link between the satellite and the mobile terminal is the most essential and critical part of the transmission path that will influence greatly the performance of the entire system. The author covers some design principles of the LMSS channel and describes its application using Ka-band (30/20 GHz) frequencies.<<ETX>>

[1]  W. C.-Y. Lee.  Statistical analysis of the level crossings and duration of fades of the signal from an energy density mobile radio antenna , 1967 .

[2]  Hong Linh Truong,et al.  Balanced HDLC Procedures: A Performance Analysis , 1980, IEEE Trans. Commun..

[3]  Daniel Cygan,et al.  The land mobile satellite communication channel-recording, statistics, and channel model , 1991 .

[4]  E. Lutz,et al.  Generating rice processes with given spectral properties , 1985, IEEE Transactions on Vehicular Technology.

[5]  F.I. Meno,et al.  Mobile fading—Rayleigh and lognormal superimposed , 1977, IEEE Transactions on Vehicular Technology.

[6]  Jonathan P. Castro.  Statistical Observations of Data Transmission Over Land Mobile Satellite Channels , 1992, IEEE J. Sel. Areas Commun..

[7]  W. C. Jakes,et al.  Microwave Mobile Communications , 1974 .

[8]  Robert M. Manning,et al.  A unified statistical rain-attenuation model for communication link fade predictions and optimal stochastic fade control design using a location-dependent rain-statistics database , 1990 .

[9]  Faramarz Davarian.  Channel Simulation to Facilitate Mobile-Satellite Communications Research , 1987, IEEE Trans. Commun..

[10]  D. J. Goodman,et al.  Packet data transmission over mobile radio channels , 1989 .

[11]  S. O. Rice,et al.  Distribution of the duration of fades in radio transmission: Gaussian noise model , 1958 .

[12]  F. Davarian.  Fade margin calculation for channels impaired by Rician fading , 1985, IEEE Transactions on Vehicular Technology.

[13]  H. W. Arnold,et al.  Fade-Duration Statistics of a Rayleigh-Distributed Wave , 1982, IEEE Trans. Commun..

[14]  P. Beckmann,et al.  The scattering of electromagnetic waves from rough surfaces , 1963 .