能量有效性频谱感知和传输方案的联合设计

为了实现认知无线网络的能量有效性传输,在混合频谱共享方式下对频谱感知和传输功率分配的联合优化方案进行研究.首先将混合频谱共享方式下的能量有效性传输描述为一个多约束优化问题,并从理论上分析了最优的频谱感知和功率分配方案.结合理论分析结果,设计了低复杂度的联合优化迭代方案以逼近优化问题的最优解.仿真结果表明所提方案的性能与最优方案非常接近,而方案复杂度却大大降低.

Schemes of Joint Design of Energy-Efficient Spectrum Sensing and Transmission

In order to realize energy-efficient transmission in cognitive radio networks, a method of the joint optimization scheme of spectrum sensing and transmission power allocation under hybrid spectrum sharing is investigated. Firstly, the energy-efficient transmission under hybrid spectrum sharing is formulated as an optimization problem with multiple constraints. The optimal spectrum sensing and power allocation schemes are analyzed. And a low-complexity joint optimization iterative algorithm is proposed to approximate the optimal solution as well. Simulation indicates that the performance of the proposed algorithm is very closed to the optimal algorithm, but with the greatly decreased complexity.