초록 ▼

An orthogonal frequency division multiplexing signal transmitted from the transmitting end to the receiving end intermittently includes a particular symbol S0 having a predetermined particular pattern in addition to a symbol Sm including data to be transmitted. At the receiving end, the variation in

An orthogonal frequency division multiplexing signal transmitted from the transmitting end to the receiving end intermittently includes a particular symbol S0 having a predetermined particular pattern in addition to a symbol Sm including data to be transmitted. At the receiving end, the variation in the receiving level and/or the variation in the frequency band of a received signal are detected and corrected on the basis of the received particular symbol S0. Since the particular symbol S0 has a particular pattern, the variation in the level and/or the variation in the frequency are strongly correlated with the variation in the receiving level and/or the variation in the frequency band of the received signal. Consequently, the variation in the receiving level and/or the variation in the frequency band of the received signal can be accurately detected from the particular symbol S0 and consequently high-precision correction can be made.

대표청구항 ▼

[ What is claimed is:] [1.] A method of transmitting an orthogonal frequency division multiplexing signal for each of a plurality of symbols having a predetermined length, from a transmitting end to a receiving end through a wire or radio transmission line, said method comprising:the transmitting en

[ What is claimed is:] [1.] A method of transmitting an orthogonal frequency division multiplexing signal for each of a plurality of symbols having a predetermined length, from a transmitting end to a receiving end through a wire or radio transmission line, said method comprising:the transmitting end continuously transmitting a first symbol which includes data to be transmitted, a multiplexing signal of the data randomly changing; andthe transmitting end intermittently transmitting a second symbol having a predetermined particular pattern, every time a predetermined number of the first symbols are transmitted; andthe receiving end demodulating data on the basis of the received first symbol; andthe receiving end correcting the variation in a receiving level based on the received second symbol.