MENG Ling-jun1, WANG Jian-liang3, PAN Feng3. Design of wireless sensor networks node based on TDOA localization mechanism[J]. 2009, 28(6): 101-103. DOI: 10.13873/j.1000-97872009.06.035.
A wireless sensor network node with acoustic localization based on DSP is introduced.It includes a TMS320F2812 DSP
a 512 kB SRAM
a 2.4 GHz RF transceiver
a acoustic signal transceiver unit and a power management unit.The node’s distance can be measured by time difference of arrival(TDOA)between radio frequency(RF)and acoustic signals.The node’location can be realized by adopting cross correlation time delay estimating algorithm.Test results show that the node can measure the distance longer than 25 m with error less than 3.7 %.