现代电子技术
現代電子技術
현대전자기술
Modern Electronics Technique
2015年
22期
102-104,107
,共4页
无线传感网络%雷击信号%检测性能%循环频率
無線傳感網絡%雷擊信號%檢測性能%循環頻率
무선전감망락%뢰격신호%검측성능%순배빈솔
wireless sensor network%lightning stroke signal%detection performance%cyclic frequency
传统传感网络雷击信号检测方法采用能量块突变检测理论进行采集,存在有限长观测缺陷,无法准确实现雷击信号的检测.提出基于循环谱理论的无线传感网络中云层雷击信号准确检测方法,依据循环谱理论,将有限长观测数据中检测雷击信号的问题看作是二元建设检验,基于雷击信号的特征,通过判断是否存在非零循环频率对雷击信号进行检测.引入检测循环频率的渐近最优检验方法,提出一种可行的循环频率判别方案,获取无线传感网络中云层雷击信号检测方案.仿真实验结果表明,所提方法可有效抑制噪声,在低信噪比下对于雷击信号具有较好的检测性能.
傳統傳感網絡雷擊信號檢測方法採用能量塊突變檢測理論進行採集,存在有限長觀測缺陷,無法準確實現雷擊信號的檢測.提齣基于循環譜理論的無線傳感網絡中雲層雷擊信號準確檢測方法,依據循環譜理論,將有限長觀測數據中檢測雷擊信號的問題看作是二元建設檢驗,基于雷擊信號的特徵,通過判斷是否存在非零循環頻率對雷擊信號進行檢測.引入檢測循環頻率的漸近最優檢驗方法,提齣一種可行的循環頻率判彆方案,穫取無線傳感網絡中雲層雷擊信號檢測方案.倣真實驗結果錶明,所提方法可有效抑製譟聲,在低信譟比下對于雷擊信號具有較好的檢測性能.
전통전감망락뢰격신호검측방법채용능량괴돌변검측이론진행채집,존재유한장관측결함,무법준학실현뢰격신호적검측.제출기우순배보이론적무선전감망락중운층뢰격신호준학검측방법,의거순배보이론,장유한장관측수거중검측뢰격신호적문제간작시이원건설검험,기우뢰격신호적특정,통과판단시부존재비령순배빈솔대뢰격신호진행검측.인입검측순배빈솔적점근최우검험방법,제출일충가행적순배빈솔판별방안,획취무선전감망락중운층뢰격신호검측방안.방진실험결과표명,소제방법가유효억제조성,재저신조비하대우뢰격신호구유교호적검측성능.
The energy block mutation detection theory is adopted in the traditional detection method of lightning stroke sig-nal in sensing network to acquire the signal,which has a defect of the limited length observation,and is unable to accurately realize the detection of the lightning stroke signal. The accurate detection method of cloud lightning stroke signal in wireless sen-sor network(WSN)is proposed,which is based on cyclic spectrum theory. The detection of the lightning stroke signal in the fi-nite length observation data is taken as the binary construction test according to the cyclic spectrum theory. Based on the feature of the signal,the lightning stroke signal is detected by judging whether non-zero cyclic frequency is existed. The asymptotic opti-mal test method of detecting the cyclic frequency is introduced. A feasible cyclic frequency discrimination scheme is proposed, which is detecting scheme of obtaining the cloud stroke lightning signal in wireless sensing network. The simulation results show that the proposed method can suppress noise effectively,and has good detection performance for the lightning stroke signal at low SNR.