电子测试
電子測試
전자측시
ELECTRONIC TEST
2013年
11期
73-75
,共3页
张志新%邱奇%刘冲%宋丽青%王天娆
張誌新%邱奇%劉遲%宋麗青%王天嬈
장지신%구기%류충%송려청%왕천요
无线传感节点%模拟滤波%数字滤波%频率混叠%分级滤波
無線傳感節點%模擬濾波%數字濾波%頻率混疊%分級濾波
무선전감절점%모의려파%수자려파%빈솔혼첩%분급려파
wireless sensor node%analog filtering%digital filtering%frequency aliasing%hierarchical filtering
本文介绍了无线传感节点中模拟滤波器和数字滤波器的设计,结合两种滤波器共同消除传感节点在信号采集过程中存在的射频干扰和频率混叠。针对节点在高采样率采集而要求过渡带窄的情况,在不降低滤波效果的前提下,进行下采样并分级滤波,降低了数字滤波的计算量。
本文介紹瞭無線傳感節點中模擬濾波器和數字濾波器的設計,結閤兩種濾波器共同消除傳感節點在信號採集過程中存在的射頻榦擾和頻率混疊。針對節點在高採樣率採集而要求過渡帶窄的情況,在不降低濾波效果的前提下,進行下採樣併分級濾波,降低瞭數字濾波的計算量。
본문개소료무선전감절점중모의려파기화수자려파기적설계,결합량충려파기공동소제전감절점재신호채집과정중존재적사빈간우화빈솔혼첩。침대절점재고채양솔채집이요구과도대착적정황,재불강저려파효과적전제하,진행하채양병분급려파,강저료수자려파적계산량。
This paper introduces the design methods of analogue filter and digital filter design in wireless sensor node.Two kinds of filter are both used to eliminate frequency interference and frequency aliasing in the process of sensor node's signal acquisition. For nodes in a high sampling rate with narrow transition zone, without reducing the filtering effect, sampling and hierarchically filtering,the amount of computation of the digital filter are reduced.