Patent ID: 7319660

Claim:
An apparatus for symbol frame synchronization of an orthogonal frequency division multiplexing transmitter comprising: an orthogonal frequency division multiplexing symbol frame generating unit generating an orthogonal frequency division multiplexing symbol frame from source data; a frame synchronization pattern insertion unit generating a frame synchronization pattern and inserting the pattern in the front part of the orthogonal frequency division multiplexing symbol frame; and an orthogonal frequency division multiplexing transmission signal conversion unit converting the orthogonal frequency division multiplexing symbol frame, into which the frame synchronization pattern is inserted, into an orthogonal frequency division multiplexing transmission signal, wherein the frame synchronization pattern insertion unit comprises: a code selection unit selecting a binary code having a high correlation characteristic and adjusting the length of the binary code according to the state of a channel environment; an alternative inversion unit keeping a value 0 without change and performing alternative inversion on a value 1 so that the polarity of the 1 becomes opposite to the polarity of an immediately preceding 1; a normalization unit generating the frame synchronization pattern by normalizing the alternatively inverted binary code; and a switching insertion unit inserting the frame synchronization pattern in the front part of the orthogonal frequency division multiplexing symbol frame through switching.