说明：  本文详细介绍了最大独立集的频谱分配算法，如果不考虑认知用户之间的干扰关系以及频谱的效益，本文值得读者借鉴
(This paper describes the spectrum allocation algorithm for maximum independent set, if you do not consider the relationship between cognitive interference between users and spectrum efficiency, this article is worth the reader learn)