Heterogeneous Cloud Radio Access Networks: Enhanced Time Allocation for Interference Mitigation

Table 2

Definition of channel matrix variables.

Parameter	Description
	Cluster power
​	Vertical and horizontal polarization components of receive and transmit antenna radiation patterns
Superscripts VV and HH	Received co-polarized signal
Superscripts VH and HV	Received cross-polarized signal
	Initial phases of a ray in cluster
	Cross-polarization power ratio
	Tx and Rx unit vector defined by equations (3) and (4)
	Coordinate of Tx and Rx MIMO antenna elements and
	Wavelength of the carrier frequency
	UE speed in the direction of (