Abstract: To help cognitive users conduct fair and efficient spectrum sensing in the cognitive environment where primary users are heterogeneous and the perceived performances of cognitive users are low due to multipath fading and sha-dow effect,a coalitional game spectrum sensing scheme was proposed.The spectrum sensing problem was modeled as a coalitional game with nontransferable utilities.Firstly,cognitive users are divided into several sub-coalitions,and each sub-coalition head node is selected according to head node selection principle.Secondly,merging and division of sub-coalitions are taken according to specific rules.Finally,sub-coalition head nodes use “OR” rules to do data fusion,and get final sense results and broadcast them to all cognitive users in sub-coalition.Simulated implementation and performance evaluation were done,and the results show that the proposed scheme has good performance.

Key words: Cognitive radio,Coalitional game,Coalitional form,Spectrum sensing