车对车三维信道建模及其空-时相关特性分析

doi:10.11959/j.issn.1000-436x.2019115

Abstract

Abstract:

To match complex wireless propagation scenarios,an improved 3D geometry-based stochastic model was proposed for vehicle to vehicle (V2V) communications channel.The exact relationship between the azimuth angle and elevation angle was taken into account and the corresponding space–time correlation function and space–Doppler power spectral density were derived,and the influence of important factors was analyzed.The observations and conclusions show that correlation characteristics is closely related to distribution of the scatterers and the angle of the antenna array under the non-isotropic scattering environment and is affected by the elevation angle of the antenna array under the isotropic scattering environment.And the space-time correlation characteristics in high vehicular traffic density is significantly lower than that in low vehicular traffic density.The corresponding simulation model is also derived by using a reasonable parameter calculation method.The simulation results validate the rationality of proposed model.It greatly improves analysis and simulation efficiency of V2V MIMO system.

Key words: vehicle to vehicle, multiple-input multiple-output, space-time correlation characteristic, 3D channel model

CLC Number:

TN929.5

ZENG Wenbo,HE Yigang,LI Bing,SHI Guolong,ZHAO Feng. 3D channel modeling and space-time correlation analysis for V2V communications[J]. Journal on Communications, 2019, 40(6): 116-127.

Figures/Tables 21

参数	定义
R_T、R_R	围绕T_X、R_X的球体半径长度
a、D	椭球的半长轴和焦距
δ_T、δ_R	T_X和R_X的天线阵列空间
θ_T、θ_R	T_X和R_X的天线阵列的方位角
ψ_T、ψ_R	T_X和R_X的天线阵列的仰角
v_T、v_R	T_X和R_X的移动速度
$γ_{T} 、 γ_{R}$	T_X和R_X的移动方位角
$α_{T}^{n_{i}} 、 α_{R}^{n_{i}}$	T_X到 $S_{i}^{(n_{i})}$ 的离开方位角和 $S_{i}^{(n_{i})}$ 到R_X的到达方位角
$β_{T}^{n_{i}} 、 β_{R}^{n_{i}}$	T_X到 $S_{1}^{(n_{1})}$ )的离开仰角和 $S_{1}^{(n_{1})}$ 到R_X的到达仰角
α^LoS	LoS分量的到达方位角
$ξ p - q 、 ξ p - n_{i} 、 ξ n_{i} - q 、 ξ n_{1} - n_{2} 、 ξ T - n_{i} 、 ξ n_{i} - R$	T_p—R_q、 $T_{p} — S_{1}^{(n_{1})}$ 、 $S_{1}^{(n_{1})} — R_{q}$ 、 $S_{1}^{(n_{1})} — S_{2}^{(n_{2})}$ 、 $O_{T} — S_{i}^{(n_{i})}$ 、 $S_{i}^{(n_{i})} — O_{R}$ 之间的路径长度

图	$\frac{D}{m}$	$\frac{a}{m}$	$R_{r}, \frac{R_{R}}{m}$	θ_T,θ_R	ψ_T,ψ_R	γ_T,γ_R	f_Tmax,f_Rmax	$k_{T}^{S B_{1}}$	$k_{R}^{S B_{2}}$	$k_{R}^{S B_{3}}$	$α_{T_{0}}^{S B_{1}}$	$α_{R_{0}}^{S B_{1}}$	$α_{R_{0}}^{S B_{3}}$	$β_{T_{m}}^{S B_{1}}$	$β_{T_{m}}^{S B_{2}}$	$β_{T_{m}}^{S B_{3}}$
图4	300	400	5	0	0	0	90.86	—	—	—	$\frac{π}{4}$	—	—	$\frac{π}{6}$	—	—
图5	300	400	5	—	—	0	90.86	6	—	—	—	—	—	$\frac{π}{6}$	—	—
图6	300	400	5	—	—	0	90.86	—	—	6	—	—	—	—	—	$\frac{π}{6}$
图7	300	400	5	0	0	0	90.86	—	—	6	—	—	$\frac{π}{4}$	—	—	—
图8	300	400	5	—	—	0	90.86	0	0	0	$\frac{π}{2}$	$\frac{3 π}{2}$	$\frac{3 π}{2}$	$\frac{π}{6}$	$\frac{π}{6}$	$\frac{π}{6}$
图9~图10	300	400	5		0	—	90.86	0、6	0、6	0、6	$\frac{π}{2}$	$\frac{3 π}{2}$	$\frac{3 π}{2}$	$\frac{π}{6}$	$\frac{π}{6}$	$\frac{π}{6}$
图11~图19	300	400	5	0	0	0	90.86	0	0	0	$\frac{π}{2}$	$\frac{3 π}{2}$	$\frac{3 π}{2}$	—	—	—

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