Table 1 Lists of necessary parameters

R

Radius of disc

10 m

M

Number of antennas

16

λ

Density

1

δ

Central angle

0.2

Ω

Channel average power

1

\(\alpha_{0}\)

Sub-interval of WEH

0.5

β

Path loss exponent

2

\(P_{{{\text{HAP}}}} {/}\sigma_{0}^{2}\)

Transmit SNR at HAP

 − 10 dB

η

Energy conversion efficiency

0.8