Robust Energy-Efficiency Transmit Power Control for OFDM-Based Cognitive Radio
Wang Ensh · Journal of Jilin University · 2016
To improve energy-efficiency and robustness of CR( Cognitive Radio),we investigate the robust energy-efficiency maximization algorithm in an OFDM( Orthogonal Frequency Division Multiplexing)-based CR networks with multiuser scenario in a given bounded uncertainty region. We use convex optimization method to obtain quasi-concave mathematic property and solve this problem via fractional programming technique.Simulation results show that this algorithm can strictly meet Qo S( Quality of Service) requirement of primary users and promote energy-efficient performance of secondary users under noise plus interference uncertainty compared with non-robust scheme.