Analytical RS-GBSM-Based Nonstationary Low-Altitude Air-to-Air Channel Modeling over Open Area

Table 1

Major parameters and symbols this paper.

Symbols	Definition
c	The speed of light
	The scatterer
	Time variant distance between the transmitter and the receiver (length of the LOS path)
	The time-variant length of the specular reflection path
	The time-variant distance between the transmitter and the scatterer
	The time-variant distance between the specular reflection point and the receiver
	The time-variant length of the th scattering subpath
	Frequency
	Central frequency
	The antenna gain of the receiver at the moment along the LOS path
	The antenna gain of the receiver at the moment along the LOS path
	The antenna gain of the receiver at the moment along the specular reflection path
	The antenna gain of the receiver at the moment along the specular reflection path
	The antenna gain of the receiver at the moment along the specular reflection path
	The antenna gain of the receiver at the moment along the specular reflection path
	The altitude of the receiver
	The time-variant altitude of the receiver
	The altitude of the transmitter
	The time-variant altitude of the transmitter
	CIR of the channel
	CIR of the LOS path
	CIR of the specular reflection path
	CIR of the scattering path
	Number of the scatterers
	The time-variant unity directional vector of the LOS path from the transmitter towards the receiver
	The time-variant unit directional vector towards O observed from T
	The time-variant unit directional vector towards O observed from R
	The time-variant unit directional vector towards the th scatterer observed from the transmitter T
	The time-variant unit directional vector towards the th scatterer observed from the receiver R
O	The origin of the XOY plane, also the specular reflection point
	The radius of the scattering area in VPS
	The time-variant radius of the scattering area in VPS
	The length of the scattering path
	The time-variant length of the scattering path
	The receiver
	The specular reflection point
	The time-variant area of the scattering ellipse
	Time
T	The transmitter
	Time variant velocity vector of the receiver
	Time variant velocity vector of the transmitter
	The time-variant 3D coordinate of the transmitter
	The time-variant 3D coordinate of the receiver
	The time-variant 3D coordinate of the scatterer
	The time-variant 3D coordinate of the th scatterer
	The azimuth angle between the scatterer and y-axis in VPS
	Path attenuation of the LOS path
	Path attenuation of the specular reflection path
	Path attenuation of the scattering path
	Path attenuation of the th scattering path
	Time interval
	Frequency interval
	Time variant reflection coefficient
	Normalized Doppler shift of the scattering path
	Radar cross section (RCS)
	Delay
	Time variant path delay of the LOS path at the moment
	Time variant path delay of the specular reflection path at the moment
	Path delay of the scattering path
	Time variant path delay of the scattering path at the moment
	Time variant path delay of the th scattering path at the moment
	The reflection angle
	The wavelength
	Internal variables
	Internal variables