[Retracted] Energy Efficiency Analysis in Modified GoF Spectrum Sensing-Based AF Relay Cooperative Cognitive Sensor Network with Energy Harvesting

Table 1

List of symbols.

Symbols	Descriptions
T	Total frame duration
θ	Power splitting ratio
β	Amplifying power gain
ρ	Signal-to-noise (SNR)
p	Path loss exponent
φ	Binary indicator
η	Energy conversion efficiency
ηEE	Energy efficiency of SU network
fs	Sampling frequency
N	Number of samples
H0, H1	PU is vacant and present
P(H0), P(H1)	Probability that the channel is idle and occupied
zn1, znj	First component and a set of test statistics
W(z)	CDF of test statistic zn1
	Weighted sum squares of znj
γr, γl, γ	Decision threshold
yST	Instantaneous sample of the received signal
	Given detection probability
Rth	PU’s minimum throughput requirement
xp, PT	PU transmitted signal, PU transmission power
xs, PSR	ST transmitted signal, ST transmission power
Eh	Energy gathered at ST
Ps	Sensing power consumption
Etot	Total energy consumption of SU
Pmax	Maximal transmission power of ST
PR, Pnp	Noise signal and variance at PU receiver
ST, Pns	Noise signal and variance at the ST
SS, Pnr	Noise signal and variance at SU receiver
dps, dsp, dss	Distance between PT and ST, ST and PR, and ST and SR
hps, hsp, hss	Instantaneous channel gains between PT and ST, ST and PR, and ST and SR
RP, RP1, RP2	PU’s achievable throughput
Rs, Rs1, Rs2	SU’s achievable throughput