Patent ID: 7542450

Claim:
A gain control method for an initial cell searching in TD-SCDMA mobile communication system, said gain control method comprising: Step A: a user terminal receiving data in the maximum receiving gain at a selected carrier frequency; Step B: recording the received data of a plurality of subframes; Step C: determining a DwPTS position of each received subframe by using a time window decision method; Step D: performing a succeeding procedure of the initial cell searching and returning to execute Step A subsequently when the DwPTS positions of the most received subframes can be determined, and executing Step E when the DwPTS positions of the most received subframes can not be determined; and Step E: judging whether a receiver is in saturation, wherein, returning to execute Step A subsequently when the receiver is not in saturation, and decreasing the receiving gain by a step length and returning to execute Step B subsequently when the receiver is in saturation.