Method and device for decoding physical broadcast channel (PBCH) in time division duplex (TDD) system

The invention discloses a method for decoding a physical broadcast channel (PBCH) in a time division duplex (TDD) system, comprising the following steps: respectively carrying out de-multiple-input-multiple-output (MIMO) processing on received data frames in accordance with antenna modes supported by the TDD system; descrambling the cached data frames which are subjected to the de-MIMO, and combining the descrambled data frames under each antenna mode by taking a frame as a unit; and decoding by using the combined data frames. The invention also discloses a device for decoding the PBCH in the TDD system. According to the method and device, the speed of decoding the data frames of the PBCH is increased greatly, and the precision rate and the decoding performance are improved.