Mobile location positioning time delay estimation algorithm in CDMA multipath environment
Caixia Liu · Journal of Dalian Maritime University · 2004
Improving the accuracy of location positioning system in cellular network is the key that location based services are widely applied. In this paper, radiolocation methods and implementations are introduced first. In order to mitigate multipath interruption in cellular system, we present a novel maximum likelihood iterative algorithm based on the theory of early-late receiver to estimate the time delay.Between [0.4,1.2] chip period, compared to conventional single path ML receiver, the proposed algorithm effectively resist the interruption of multipath. The simulation result shows that it can improve the accuracy of time delay estimation effectively in mobile location positioning system.It can be applied in other radiolocation positioning system too.