| Summary: | 碩士 === 中原大學 === 電機工程研究所 === 95 === The fading channels have been investigated for about four decades. The related topics include space-time correlation function for the multiple-input-multiple-output (MIMO) communication systems, simulation schemes of fading channels, and estimation of Doppler shift etc.. Most researches always focus on the scattering environment of two-dimensional (2-D) base station to mobile station (BS-MS). However, the BS-MS model seems to lack of certain condition toward a realistic situation, the simultaneous mobility for both the transmitter and the receiver.
Consequently, the 2-D mobile-to-mobile (M-M) communication system was proposed. This system can be applied into the ad hoc networking and dedicated short range communications systems. But in the urban, we need to consider the horizontal wave plane and vertical wave plane of received signals. In practice, one important parameter, elevation angle (EA), will be added into 2-D channel models to achieve the 3-D propagation environment. Then, it can describe the urban environment sufficiently.
Therefore, in this thesis, we present a space-time-frequency correlation function (STF-CF) and a simulation scheme of 3-D double-ring mobile-to-mobile (M-M) Rayleigh fading channel. We have been discussed the STF-CF via the composition of antenna patterns, Doppler shift, and delay profile. The simulation scheme utilizes the Monte Carlo Principle and the method of the Doppler spread. Four types of the EA PDF, Aulin, Parsons, Qu-Yeap, and uniform model with different antenna array patterns, and Doppler shift will be discussed in the STF-CF and simulator. The related statistics of the simulator will be presented.
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