一种适用于双卫星系统窄带LMS信道的状态模型

doi:10.3969/j.issn.1001-2400.2015.01.026

Abstract

Abstract:

Considering the low service availability and limited usage scenarios of state modeling for the single-satellite system, the state modeling of the Land Mobile Satellite (LMS) channel, based on the model parameters extracted from the Global Navigation Satellite Systems(GNSS) measurement data, is analyzed for much more scenarios. A joint generation of the states sequence for the dual-satellite is presented by the first-order Markov chain and semi-Markov chain. Various elevation combinations and azimuth separations in terms of correlation coefficients, state probabilities, and state duration statistics are analyzed. Simulation results show that the semi-Markov model with lognormal-fit can describe the state modeling of the dual-satellite propagation channel more accurately and effectively compared with the measurements. It has better applicability for various constellations in different channel environments, and can be used in modeling of the multi-satellite channel and system performance analysis.

Key words: satellite systems, land mobile satellite channel, state modeling, Markov chain, semi-Markov chain, angle diversity

CLC Number:

TN927

LIAO Xi;XUE Rui;ZHAO Danfeng. State modeling of the narrowband LMS channel suitable for dual-satellite systems[J].J4, 2015, 42(1): 161-167.

References

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State modeling of the narrowband LMS channel suitable for dual-satellite systems

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