A robust timing recovery apparatus over frequency selsctive time-varying channels and a method timing recovering

摘要

resilient robust time synchronization time synchronization restored in time-varying channel conditions of frequency selective device and restore his time synchronization method is disclosed. Time synchronization restoration apparatus for selecting a selected multi-path and multi-path estimation, the estimated multi-path of the largest signal to estimate the multipath to the received signal in the frequency domain and estimates the path delay value of the largest signal, part, and the largest signal in the basis of the path delay value, and detects a symbol timing offset with a feedback of DLL (Delayed Locked Loop), a phase compensation to compensate for the sampling timing based on a fractional symbol timing offset of the detected symbol timing offset part, and the symbol timing offset based on the integer multiple of the detected symbol timing offset has a window adjusting unit for adjusting a FFT (Fast Fourier Transform) window. Therefore, by setting the strongest signal of the reference signal of the adaptive multi-path as DLL, are any one of the multipath signal can be detected long deep fading (deep pading) state even adaptively symbol timing offset.