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《Chinese Journal of Sensors and Actuators》 2007-03
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Few Location Algorithms Comparison in Quasi-GPS Ultrasonic Location System

CHENG Xiao-chang, SU Shao-jing, WANG Yue-ke , DU Jin-bang (School of Mechatronics Engineering and Automation, National Univ. of defense Technology, Changsha 410073, China)  
In view of the deficiencies of the conventional ultrasonic location system, Quasi-GPS ultrasonic location system and its work principle are introduced. After the estimative distances between the object to be located and the Base-Stations are obtained, the Gauss-Newton iterative location algorithm is analyzed. Considering of the above algorithm is not appropriate to be realized in DSP (Digital Signal Processor), three additional location algorithms are presented: the improved Gauss-Newton iterative algorithm, the intersectant circle chord, the least square estimation. It shows by simulation that the location precision of the improved and conventional Gauss-Newton algorithm is equivalent but the location precision of the two rear algorithms is baddish under the same condition, i.e., the same measurement error and the same Base-Stations for location. These two rear algorithms are easier to be realized in DSP because they need little calculation and they don’t involve square-root and iterative operation.
【CateGory Index】: TB559
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