Opportunistic spectrum sharing in relay-assisted cognitive systems with imperfect CSI

Keyphrases

• Relay-assisted 100%
• Imperfect Channel State Information 100%
• Opportunistic Spectrum Access 100%
• Cognitive Systems 100%
• Cognitive Base Station 100%
• Quality of Service 50%
• Primary Network 50%
• Optimization Problem 50%
• Optimization Approach 50%
• Spectrum Sharing 50%
• Spectral Efficiency 50%
• Cognitive Radio System 50%
• Nonconvex 50%
• Convex Optimization 50%
• Approximate Solution 50%
• Beamforming 50%
• Beamforming Weights 50%
• Primary System 50%
• Optimal Beamforming 50%
• Randomized Methods 50%
• Robust Design 50%
• Intended Receiver 50%
• Cognitive Radio User 50%
• Semidefinite Programming 50%

Engineering

• Primary User 100%
• Channel State Information 100%
• Basestation 50%
• Beamforming 50%
• Optimization Approach 25%
• Primary Network 25%
• Cognitive Radio 25%
• Quality of Service 25%
• Optimisation Problem 25%
• Spectrum Efficiency 25%
• Cognitive Radio System 25%
• Primary System 25%
• Randomization 25%
• Closed Form Solution 25%
• Approximate Solution 25%
• Robust Design 25%
• Intended Receiver 25%