一种基于OFDM的认知无线电资源分配算法研究

摘要

This paper focused on a resource allocation algorithm for OFDM-based cognitive radio with consideration of the influence of frequency sensing error, which applies better to practical application. The proposed resource allocation algorithm works out an energy efifcient resolution of the problem under the limitation of total power and interference. Moreover, the algorithm can satisfy minimum transmit rate requirements of all SUs. The simulation results show that the proposed algorithm reduces the computational complexity, and ensures fairness among all SUs. Meanwhile, the consideration of sensing error makes the resolution more closed to practical condition, so the algorithm can apply to real time application well.%研究了一种基于OFDM的认知无线电系统资源分配算法，考虑了频谱感知误差对资源分配造成的影响，更贴近实际情况。提出的次优化资源分配法算法，在能效最优的目标下，满足了总功率门限、干扰门限及每个认知用户最低传输速率的约束限制。仿真结果表明该算法计算复杂度低，能确保各用户的公平性。同时，感知误差的考虑使结果更接近实际情形，适用于实时应用。