Uplink signal transmitting method for user device and its method for timing synchronization

An uplink signal transmission method for a user equipment and a timing synchronization method thereof include the steps of: estimating an downlink channel impulse response h by the user equipment; determining the conjugation of h; preparing a uplink signal to be transmitted; filtering said signal by using a coefficient matched with h the matched filter has a conjugation of h; determining whether the traffic channel of the user equipment adopts pre-rake technique, and deciding whether the transmission timing is adjusted according the determining result; transmitting the timing-adjusted or unadjusted uplink signal to a base station by the user equipment; making correlation or FFT transformation for uplink pilot by the base station finding peak position, and performing uplink synchronization. Present invention can make the base station receive a great amount of energies of a certain multipath tap, improve uplink synchronous detection performance, thereby improve uplink synchronization performance.