Separability of time-frequency synchronization

Recently proposed new time synchronization using frequency domain (FD) integration and time domain (TD) spread spectrum (SS) codes has been shown to be robust to frequency offset, that has its dual frequency synchronization using TD integration and FD SS codes which is robust to timing offset. Separable property (SP) is defined for time-frequency synchronization under the condition containing time and frequency deviations is to be performed separately and cooperatively. The SP comples us to design phase corrections on SS codes and transmitted data.