Abstract: A clock signal in a TDMA burst signal is recovered by using the frequency and phase information extracted by taking a moving average of plural bursts received previously from the same earth station. The system has memory storage for storing frequency and/or phase information of a moving average of plural bursts received previously, and clock signal necessary to demodulate the present burst is recovered by using output of the memory storage. Thus, the synchronized clock signal for demodulating the received burst is obtained in a short time, or even a clock recovery bits in a burst may be removed. The establishment of the synchronized clock signal is indicated by a synchronization circuit which provides the establishment signal for each burst after receiving a predetermined plurality of bursts from the same earth station.