频谱感知是实现认知无线电功能的前提条件,也是认知无线电领域的一个研究热点。近年来人们提出了很多种频谱感知方法,尤其协作感知技术日益受到关注。综述了协作频谱感知技术的最新研究进展,先描述典型的认知无线电协作频谱感知模型,然后讨论了协作感知中信息融合及性能分析等关键问题,最后指出了协作感知的研究挑战和发展趋势。 Spectrum sensing is a prerequisite for realizing the function of cognitive radio and is also a research hotspot in the field of cognitive radio. In recent years, many kinds of spectrum sensing methods have been proposed. In particular, collaborative sensing technology has drawn increasing attention. This paper reviews the recent research progress of collaborative spectrum sensing technology, first describes typical cognitive radio collaborative spectrum sensing model, and then discusses the key issues such as information fusion and performance analysis in collaborative sensing. Finally, it points out the research challenges and development trends of collaborative sensing.