Abstract
Connected vehicles have received much attention in recent years due to their significant societal benefit and commercial value. However, a suitable channel model for vehicle-to-vehicle (V2V) communications is difficult to build due to the dynamic communication environment. In this paper, a three-dimensional (3D) geometrical propagation model that includes line-of-sight (LoS), single bounced (SB), and multiple bounced (MB) rays is proposed. Each of multiple scatterers in the model is moving with a random velocity in a random direction. Based on the geometrical propagation model, a generalized 3D reference model for narrowband multiple-input-multiple-output (MIMO) V2V multipath fading channels is developed. The corresponding space-time correlation functions (ST-CFs), time correlation functions (T-CFs), and space correlation functions (S-CFs) are analytically investigated and numerically simulated in terms of various factors. Several notable ST-CFs for V2V and fixed-to-mobile (F2M) communications become the special cases of ST-CFs of the proposed model by adjusting the corresponding channel parameters. Finally, the theoretical results of the space-Doppler power spectral density (SD-PSD) are compared with the available measured data. The close agreements between the theoretical and measured SD-PSD curves confirm the utility and generality of the proposed model.
Highlights
Connected vehicles have the potential to improve the safety and efficiency of the automobile transportation [1], and they are expected to be a pillar of a smart society and to revolutionize the way people move
(i) We propose a generalized geometrical model and a generalized reference model that include LoS, single bounced (SB), and multiple bounced (MB) rays between the transmitter and receiver for 3D narrowband MIMO V2V communications
The scatterer velocity is uniformly distributed with an average speed of 25 m/s that may be the velocity of passing vehicles
Summary
Connected vehicles have the potential to improve the safety and efficiency of the automobile transportation [1], and they are expected to be a pillar of a smart society and to revolutionize the way people move. The work of [20] did not investigate and take into account the space-time correlation functions (ST-CFs), scatterer velocity distributions, angle distributions, and so on It is unavoidable in V2V communications that the rays from the transmitter to receiver are multiple bounced (MB) by moving scatterers, especially in environments with highdensity scatterers, for example, urban area. This paper strives to alleviate the current lack of analytical studies by investigating the model and statistical properties of a narrowband 3D MIMO V2V channel in which the local multiple scatterers are moving with random velocities in random directions.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
