Thursday, March 25, 2010

angle calculation

It can caculate cross-correlation and the angle calculation for the wedding gowns dresses acoustic signals acquired by the acoustic arrays, and reached new shoes 2010 precise localization of the acoustic source signal in real-time. In terms of software, first of all, simulation about the new wedding dresses cross-correlation time-delay estimation algorithm and cheap evening dresses array algorithm was implemented at the theoretical point, and its results showed the discount wedding gowns feasibility of the algorithms. Secondly, the compiler and optimization of the program code and algorithm was taken by the use of program code development environment (CCS) of DSP and completed the design of each functional module. Finally, power is the lifeblood of wireless sensor networks. Low-power modes of the system was also designed and implemented in the idle, standby and halt modes, as well as the wake-up modes of the three low-power modes. It was enable the system in sleep mode and reduced the power consumption to 25% compared in normal operation mode, and extended the working life of the nodes.By experimenting the acoustic signals of target,and the localization ambiguity of periodic signal was solved fundamentally to improve the localizatin accuracy.Tests results showed that the maximum accuracy of system is about 4.0122°,and completed accurate localization of acoustic source.
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