Multi-Objective Resources Allocation for OFDM-Based Cognitive Radio Systems

Resource Allocation for Ofdm-based Cognitive Radio Systems

X Power Allocation in OFDM-Based Cognitive Radio Systems

Power Allocation in OFDM-Based Cognitive Radio Systems

In this thesis, we develop an subcarrier transmission suboptimal power allocation algorithm and an underlay subcarrier transmission optimal power allocation algorithm for the orthogonal frequency division multiplexing (OFDM)-based cognitive radio (CR) systems with different statistical interference constraints imposed by different primary users (PUs). Given the fact that the interference constr...

OFDM Systems Resource Allocation using Multi- Objective Particle Swarm Optimization

Orthogonal Frequency Division Multiplexing (OFDM) has the inherent properties of being robust to interference and frequency selective fading and is de facto the adopted multiplexing techniques for the 4 th generation wireless network systems. In wireless system, resources such as bandwidth and power are limited, intelligent allocation of these resources to users are crucial for delivering the b...

A Survey on Efficient Power allocation for OFDM – Based Cognitive Radio Systems

A traditional design for Cognitive Radio (CR) systems using Orthogonal Frequency Division Multiplexing (OFDM) – is mainly concentrate on throughput of the system, but in today Energy Efficiency (EE) of wireless networks become more and more significant. The interference between the licensed and unlicensed users is a major problem in the cognitive radio systems. On the way to avoid this several ...