Title :
Simulation techniques for mobile satellite channel
Author :
An, Jone F. ; Chen, Ming H.
Author_Institution :
Nat. Taiwan Ocean Univ., Keelung, Taiwan
Abstract :
To evaluate the system performance for mobile satellite communications, it is necessary to take into account the effects of channel impairments by quantitative simulations. Although multipath fading is less destructive to signal propagation than in the case of land mobile radio, channel characterization is still of interest to system planners and designers. The research reported in the paper has resulted in the development of a Markov 3-state stochastic channel model that is useful in testing various digital modulation, channel coding, and receiver diversity designs. A mathematical algorithm is used to generate the Rayleigh fading, Rician fading, and log-normal fading signals which are subsequently used to realize the proposed channel model in cooperation with a linear combination of probabilities of state occurrence and state transition. This developed channel model has been successfully implemented in a TMS320C30 microprocessor to provide a real-time simulation capability. The bit-error-rate (BER) performance of π/4DQPSK modulation, with I/Q coherent detection has been tested using the system
Keywords :
Markov processes; Rayleigh channels; Rician channels; channel coding; differential phase shift keying; digital simulation; diversity reception; error statistics; fading; log normal distribution; mobile satellite communication; quadrature phase shift keying; signal detection; simulation; stochastic processes; π/4DQPSK modulation; I/Q coherent detection; Markov 3-state stochastic channel model; Rayleigh fading; Rician fading; TMS320C30 microprocessor; bit-error-rate performance; channel characterization; channel coding; channel impairments; digital modulation; log-normal fading signals; mobile satellite channel; multipath fading; real-time simulation capability; receiver diversity; simulation techniques; state occurrence; state transition; system performance; Digital modulation; Fading; Land mobile radio; Rayleigh channels; Satellite broadcasting; Satellite communication; Signal design; Stochastic processes; System performance; Testing;
Conference_Titel :
Military Communications Conference, 1994. MILCOM '94. Conference Record, 1994 IEEE
Conference_Location :
Fort Monmouth, NJ
Print_ISBN :
0-7803-1828-5
DOI :
10.1109/MILCOM.1994.473815
