A signal processing scheme through which the receiver may, at any time, synchronize or resynchronize itself to the transmitted data signals that are received over a dynamic dispersive channel. At the transmitter, bursts or sequences of known symbols are interleaved with unknown data. At the receiver...http://www.google.com.tw/patents/US4599732?utm_source=gb-gplus-share專利 US4599732 - Technique for acquiring timing and frequency synchronization for modem utilizing known (non-data) symbols as part of their normal transmitted data format
