Energy Efficiency Maximized Resource Allocation for Opportunistic Relay-Aided OFDMA Downlink with Subcarrier Pairing

Table 2

Network Parameters.

Meanings	Parameters	Values
Bandwidth of the network		20 MHz
Subcarriers’ number		32
Loss factor of the PA		0.3
Circuit power of BS and RS		500 w
Radius of UR		0.2 km
Distance between BS and the UR center		1.5 km