认知无线电网络中的合作频谱分配算法（增刊修改稿）

研究认知无线电网络中的动态合作频谱优化分配，给出了基于图着色理论的频谱分配模型，针对固定拓扑提出了加权分布式贪婪算法WDGA、基于公平性的分布式贪婪算法BFDGA及改进的随机分布式算法IRDA，分别实现了基于吞吐量、公平性及合作开销的频谱优化分配；针对可变拓扑提出了一种快速信道调整算法FCAA，在保证吞吐量和公平性性能的前提下可以明显减小开销。

Collaborative Spectrum Allocation Algorithm of Cognitive Radio Network

Dynamic collaborative spectrum allocation optimization of cognitive radio network is studied in this paper. A spectrum allocation model based on graph coloring theory is proposed. For an immutable topology, weighted distributed greedy algorithm, fairness based distributed greedy algorithm and improved randomized distributed algorithm are proposed for optimizing throughput, fairness and collaborative overhead respectively. For a mutable topology, a fast channel adjustment algorithm is proposed. Experimental results show that the algorithm reduces communication costs remarkably while providing good performance in throughput and fairness.