Fig. 3From: Performance analysis and power allocation strategy in single-antenna cognitive overlay systemsVariation of total power consumption with power allocation factor δ given different channel conditions \(\left ({\sigma _{s}^{2}} = 1, \sigma _{n,T_{B}}^{2} = \sigma _{n,R_{B}}^{2} = \sigma _{n,R_{A}}^{2} = 1, {\text {BER}}_{A} = {10^{- 3}}\, \text {and} \,{\text {BER}}_{B} = 5 \times { 10^{- 3}}\right)\) Back to article page