Up and down receiving and sending switch control system for TD-SCDMA direct repeater station

The utility model relates to a TD-SCDMA direct station ascending-descending receive/send control system which mainly comprises an energy detecting unit and a commutation control logic unit. The input signal of the energy detecting unit is obtained from a donor aerial terminal coupling and the output thereof is directly connected with the energy commutation control logic unit which outputs various required receive/send commutation control signals. A phase difference estimation module in the commutation control logic unit is used to estimate the phase differences of an interval switching timing reference pulse output by a characteristic window extraction module and a local interval switching timing pulse output by a local timing generating module and output phase 'plus' and 'minus' signals to the local timing generating module to regulate the phase and cycle of the local interval switching timing pulse and output a phase difference locking signal when the phase difference meets the requirements. The TD-SCDMA direct station ascending-descending receive/send control system has the beneficial effects of adoption of the singlechip structure for the detecting control logic, low cost, realization of all functions with the hardware CPLD, great real-time property.