CAJ | 학술논문

该文基于多比特的量化策略,提出了无线传感器网络中多比特分布式滚动时域状态估计算法.每个传感器节点预先设定一个包含多个阈值的阈值簿,利用这个阈值簿将观测值量化成多比特,融合中心接收这些比特信息运用滚动时域的思想得到系统的状态估计值,与预期相同.仿真结果表明阈值簿中阈值个数越多则估计的结果会越精确.与单比特滚动时域状态估计方法相比,该方法避免了每一时刻传感器节点接收融合中心的反馈状态估计值用来设计阈值,并且在多比特信息下状态估计值的精度更高.
해문기우다비특적양화책략,제출료무선전감기망락중다비특분포식곤동시역상태고계산법.매개전감기절점예선설정일개포함다개역치적역치부,이용저개역치부장관측치양화성다비특,융합중심접수저사비특신식운용곤동시역적사상득도계통적상태고계치,여예기상동.방진결과표명역치부중역치개수월다칙고계적결과회월정학.여단비특곤동시역상태고계방법상비,해방법피면료매일시각전감기절점접수융합중심적반궤상태고계치용래설계역치,병차재다비특신식하상태고계치적정도경고.
In this paper, a distributed moving horizon state estimation approach is presented based on multi-bit quantized data. Each sensor node preserves a list of thresholds which are used to quantize observations into multiple bits. After receiving these bits, the Fusion Center (FC) makes the final estimation for system states. Simulation results show that the more number of thresholds, better estimation results will be made, Which is Consistent with Common Sense. Compared with single bit distributed moving horizon state estimation, this method avoids FC sending the estimate information back to sensor nodes and provides higher precision of state estimation.