Title :
Calibration of NLOS error for positioning systems
Author :
Jeong, Yangseok ; You, Heungryeol ; Lee, Chungyong
Author_Institution :
Dept. of Electr. & Electron. Eng., Yonsei Univ., Seoul, South Korea
Abstract :
In positioning system NLOS (non-line of sight) errors always cause remarkable positive bias to the estimation of TOA (time of arrival) or TDOA (time difference of arrival) and directly affect range measurement errors. A new method is proposed to calibrate NLOS errors by using the relationship between the mean excess delay and the delay spread measured at a mobile station. The computer simulations showed that the proposed calibration technique effectively reduces the positioning error caused by the urban NLOS environment
Keywords :
calibration; delays; direction-of-arrival estimation; land mobile radio; measurement errors; multipath channels; radionavigation; NLOS error calibration; TOA estimation; computer simulations; delay spread; mean excess delay; mobile station; multipath signals; nonline of sight errors; positioning systems; range measurement errors; time difference of arrival estimation; time of arrival estimation; urban NLOS environment; Calibration; Communications Committee; Computer errors; Computer simulation; Delay estimation; Measurement errors; Propagation delay; Safety; Telecommunications; Time of arrival estimation;
Conference_Titel :
Vehicular Technology Conference, 2001. VTC 2001 Spring. IEEE VTS 53rd
Conference_Location :
Rhodes
Print_ISBN :
0-7803-6728-6
DOI :
10.1109/VETECS.2001.944072
