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目标检测就是判断被监测对象是否出现,是无线传感器网络应用的首要前提。由于传感器节点协作执行检测任务,因此,应用于通信网中的解耦和最大吞吐量的网络设计不能使系统检测性能最优。提出了集成物理层、MAC层和应用层的跨层设计,设计了感知信息质量、信道状态和有效能量协同的传输控制策略,该传输策略可以有效地调节节点和融合中心的通信使系统的检测性能最优。最后,通过解决非线性约束优化问题分别为ALOHA和TDMA传感器网络得到最优的设计变量,并与典型的解耦和最大吞吐量设计比较检测性能增益。
Target detection is to determine whether the monitored object appears, is the first prerequisite for wireless sensor network applications. Due to the cooperation of sensor nodes in the detection task, the network design applied to decoupling and maximum throughput in the communication network can not optimize the system detection performance. A cross-layer design of integrated physical layer, MAC layer and application layer is proposed. A transmission control strategy is designed to perceive the quality of information, channel state and effective energy coordination. This transmission strategy can effectively adjust the communication between the node and the fusion center to make the system detect Optimal performance. Finally, optimal design variables are obtained for the ALOHA and TDMA sensor networks by solving nonlinear constrained optimization problems, respectively, and the performance gains are compared with typical decoupled and maximum throughput designs.