Abstract: Aiming to energy constrained problems in wireless sensor networks，to minimize the energy consumption in spectrum sensing，a combination of sleeping and censoring spectrum sensing scheme on the basis of the double-threshold detection mode is proposed，which is suitable for the sensor networks effectively.Only a few sensors are selected to cooperate and others are in sleep mode while guaranteeing the detection performance of spectrum sensing.The sensors with reliable information are only allowed to transmit the one-bit local decision to the fusion center.Simulation result shows that the scheme greatly reduces the energy consumption and bandwidth consumption compared with the conventional energy detection scheme.

Key words: wireless sensor networks, cognitive radio, spectrum sensing, sensing energy

摘要： 针对无线传感器网络能量受限问题，以双门限能量检测为基础，以最小化系统感知能耗为目标，提出了一种适合无线传感器网络的休眠与审核相结合的频谱感知方法。在获得目标检测性能条件下，该方法让部分传感器负责频谱感知工作，其他处于休眠状态，只让有准确感知结果的传感器发送1 bit感知结果到融合中心。理论分析和仿真结果表明，与传统的能量检测方法相比，该方法既有效减少了系统的感知能耗，又节约了带宽。

关键词: 无线传感器网络, 认知无线电, 频谱感知, 感知能耗