As major parts of the traditional MMSE-Rake algorithm

the optimization &selection of fork indexes are widely applied in UWB Rake receivers.In order to improve the fast recognition ability of the UWB system for multipath signal reception in low-speed transmissions

this paper proposes an improved Minimum Bit Error Rate（MBER）algorithm based on optimizing the tap coefficients and realizes fast location by simplifying the Rake fork index without reducing the multipath resolution.The simulation results show that

in low-speed CM3 and CM4multipath simulation channel transmissions

the improved algorithm is superior to the conventional MMSE-Rake algorithm in performance as it does not only reduce the complexity of Rake receivers but also improve real-time signal reception.