Study On Vehicle-to-Vehicle Wireless Fading Channel Modeling And Simulation

Vehicle-to-Vehicle communication system is a type of wireless communication that serves as the point-to-point communication service which does not base on the fixed base station. It attracts more and more the attention of the wireless community, which is an emerging technology that introduces a wide range of application. These applications could be classified into transportation safety and non-safety application. Under safety applications, the main focus is given to Vehicle Collision Avoidance (VCA). The Dedicated Short Range Communication (DSRC) standard, is designed for inter-vehicle communications and vehicle-to-infrastructure communications. The DSRC is under investigation by the IEEE802.11p Task Group.Inter-vehicle communication is a kind of M2M communication, which is not based on the fixed base station. In early study, the mobile-to-fixed channel impulse response and the channel capacity have been investigated. For both of the transmitter and receiver are in motion, in inter-vehicle communication, the statistical properties of the underlying radio channel different from typical cellular channels. Hence, new channel models are required for inter-vehicle communications. So far, M2M channel modeling has been the topic of several papers were the first to propose a channel model for single-input single-output (SISO) M2M Rayleigh fading channels and its statistical properties. A reference model of a narrowband M2M channel has been proposed. A ray-optical approach is used to model the wave propagation. The resulting channel impulse response can be used for system simulations. Field results are described for non-line-of-sight (NLOS) and line-of-sight (LOS) inter-vehicle radio links. Meanwhile, MIMO systems employ multiple transmit and multiple receive antennas. The profit from using several antennas on the transmit and receive side is that not only the system performance can be improved, but also the capacity can be increased in comparison to SISO communication systems. This fact, combined with the opportunities opened by large vehicle surfaces on which multielement antennas can be placed, makes MIMO techniques very attractive for vehicle-to-vehicle communications. The geometrical based reference model considering only double-bounced rays for narrowband MIMO M2M Rayleigh fading channels were presented, and the corresponding simulation model were presented. A T-intersection street isotropic scattering model was proposed for narrowband MIMO M2M by considering only the double-bounced rays.The main research contributions of our work can be briefly summarized as follows:(1) Deterministic simulation model parameters computation methods analyzing. In this part, the model parameters computation methods such as Lp-norm method, Riemann sum method(RSM), method of equal distansces(MED), mean-square-error method(MSEM), method of equal areas(MEA), method of exact Doppler spread (MEDS)and so on are analyzed. And then studied the effects caused by the model parameters on the statistical properties of the simulation model. Finally, we compare the performances of the methods discussed before by numerical results. The research work is basic work for M2M channel deterministic channel models parameters computing.(2) Geometrical modeling for a wireless transmission link between two mobile stations is introduced. We propose a modified geometrical two-erose-ring scattering model for the multiple-input multiple-output (MIMO) mobile-to-mobile (M2M) fading channels. In this model, the single-bounced, double-bounced, and light-of-sight (LOS) components are all considered. As a starting point, the reference model is derived from the geometrical two-erose-ring scattering model. Its statistical properties such as the three-dimensional (3D) space-time cross-correlation function (CCF), the two-dimensional (2D) spatial cross-correlation function, and the temporal auto-correlation function (ACF) are studied. For applying the reference model in the practical implementation, deterministic simulation model is derived. Finally,the excellent corresponds between the statistical properties of the simulation model and those of the reference model are demonstrated by numerical results.(3) A high-performance simulation model for wideband multiple-input multiple-output (MIMO) vehicle-to-vehicle (V2V) fading channels in T-junction propagation environments is proposed. The so-called Riemann sum method (RSM) is applied for the parametrisation of the simulation model. Furthermore, the statistical properties of the wideband MIMO V2V channel simulation model, such as the spacetime-frequency cross-correlation function (STF-CCF), the twodimensional spatial cross-correlation function (2D spatial CCF) and the temporal auto-correlation function (ACF) are studied. Finally, the high accuracy of the proposed simulation model is demonstrated by comparing the correlation properties of the simulation model with those of the underlying reference model.