A new Channel Time Allocation Particle Swarm Optimization (CTA-PSO) is proposed to solve the network utility maximization (NUM) resource allocation problem. CTA-PSO optimizes the time allocated to ...

In this paper, we study the problem of designing the optimal sensing time and power allocation strategy, in order to maximize the ergodic throughput of a cognitive radio that employs simultaneous ...

Top 10s explores the most convincing theories that suggest time travel might not be as impossible as we think. A missing woman was found against the odds in the California mountains. Now ...