IMPROVING POSITIONING ACCURACY INWCDMA/FDD NETWORKS UTILIZING ADAPTIVETHRESHOLD FOR DIRECT COMPONENTDETECTION

摘要

In NLOS propagation conditions power of direct component can be attenuated significantly. Thereforedetection of direct component is aggravated which can degrades accuracy of Time of Arrival mobilepositioning. The goal of this paper is to determine possibilities to improve estimation of direct componenttime delay by reducing detection threshold. Three different methods for calculating threshold has beentested and compared in terms of positioning error.