It is shown that the need for synchronization in frequency and time of the transmitter and receiver data transmission system with orthogonal signals is caused by signal representation by trigonometric Fourier series. It is suggested to transmit data by means of the signals, which are obtained as a result of displacement of the impulse response of the channel-forming equipment at multiple intervals. The algorithm, which allows determining the time delay of the required signal relative to the reference oscillation, is considered. The block diagram of the synchronization device, that implements the algorithm, has been worked out. The method of determining the arrival time of useful and reflected signals to the receiver input, which used to reduce the influence of multipath propagation of the signal on the synchronization device, has been worked out.