This invention discloses a device to initialize timing synchronization used in communication system, which comprises a storage unit to storage the received reception sequence samples and to send the storage reception sequence samples to a relativity checking unit, a weighted power computing unit to compute the weighted power of the receipted reception sequence samples and to send the weighted power to a parameter estimation unit, the relativity checking unit to perform the relativity checking of the reception sequence samples sent by the storage unit to generate the relativity coefficient, the parameter estimation unit to estimate the location estimation of the timing synchronization according to the weighted power and the relativity coefficient. This invention also discloses the method and receptor used to initialize timing synchronization in communication system. Very high precision of timing synchronization can be obtained and the errors of the timing synchronization estimation and the frequency deviation estimation can be greatly reduced by the adoption of this invention. |