Research of acoustic ranging signal TOA estimate algorithm in wireless sensor network
Several acoustic ranging signals TOA (time of arrival) detection methods are researched and a new method based on the digital signal rectifying process is introduced. It is used in the wireless sensor networks node self localization, includes the following steps: increase signal noise ratio, remove DC (direct current) value, full-wave rectifying process, low-pass filter process and TOA estimate. It has been implemented with a dsPIC6014A microcontroller. Test results show that the estimate error of TOA is less than 3.5％ with 30 meters distance when the time of computing was about 1.5 seconds (10MHz clock) and the sample length was 4096 (12bits of each sample data)points.
wireless sensor network node localization acoustic ranging time of arrival
MENG Ling-jun XIA Shan-hong
State Key Lab of Transducer Technology, Institute of Electronics, Chinese Academy of Sciences, Beiji State Key Lab of Transducer Technology, Institute of Electronics, Chinese Academy of Sciences, Beiji
国际会议
北京
英文
2007-08-05（万方平台首次上网日期，不代表论文的发表时间）