针对目前SimpliciTI协议单点频谱检测存在的自干扰和隐藏终端问题,为了提高无线传感网络的抗干扰能力,根据协作频谱检测原理,提出了基于半投票规则的集中式协作频谱检测的协作频率捷变(cooperative frequency agility, CoFA)机制,并应用于SimpliciTI协议。该机制不仅发挥了协作频谱检测在减小多径、阴影效应及隐藏终端问题方面的优势,还能够解决传统FA机制的自干扰问题。实验测试表明此方法可以有效地解决原FA机制的自干扰问题,并且使SimpliciTI的频谱检测性能平均提升42%。
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