The vector tracking loop based on delay locked loop in GPS receiver

□ Architecture of VTL based on DLL was shown and demonstrated and implemented in Matlab by a software receiver. □ The VTL showed better performance in comparing to STL. □ Phase of signal can be tracked to 36s without signal availability □ Disadvantages and future works □ The software cannot run real time. □ Covariance matrix is switch manually. □ VTL based on carrier tracking loop.