Patent ID: 8374075

Claim:
A method for synchronizing OFDM receiver (MSOR) to OFDM composite frames carrying data or pilot information, based on utilizing a referencing frame signal recovered from said composite frames, wherein an interval of said referencing frame signal is recovered as corresponding to a single said composite frame or multiple said composite frames; wherein such (MSOR) comprises the steps of: detecting boundaries of said composite frames by processing these composite frames or a sub-carrier signal recovered from these composite frames; using said boundaries detections for specifying said referencing frame signal by delimiting said interval of referencing frame, wherein a known detection delay is maintained between the composite frame and the referencing frame; using sub-clocks of a local clock for measuring a lengths difference between said interval of referencing frame and an interval of an equivalent symbol frame, wherein said interval of equivalent symbol frame contains a number of cycles of said local clock expected to occur during said interval of referencing frame; calculating a frequency offset between the referencing frame and the equivalent symbol frame by dividing said lengths difference by a lengths of the interval of referencing frame or by a length of the interval of equivalent symbol frame; using such frequency offset in a frequency locked loop maintaining frequency alignment between the local clock and an OFDM transmitter clock; using said sub-clocks of the local clock , the detection delay and the length difference for synthesizing a symbol frame signal aligned in phase to the composite frame represented by the referencing frame, wherein the symbol frame signal defines a set of composite signal samples belonging to the same single composite frame.