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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.
In order to realize the energy-efficient transmission of cognitive wireless networks, a joint optimization scheme of spectrum sensing and transmission power allocation is studied in hybrid spectrum sharing mode.First, the energy-efficient transmission in hybrid spectrum sharing is described as a multi-constraint optimization Problem and theoretical analysis of the optimal spectrum sensing and power allocation scheme.According to the theoretical analysis results, a joint optimization iterative scheme with low complexity is designed to approximate the optimal solution of the optimization problem.The simulation results show that the performance of the proposed scheme Very close to the optimal solution, but the program complexity is greatly reduced.