METHOD AND APPARATUS FOR IMPLEMENTING GUARD INTERVAL USING CYCLIC SUFFIX IN OFDM SYSTEM

摘要

PURPOSE: A method and apparatus for implementing guard interval using cyclic suffix in OFDM system is provided to reduce the chip size of hardware by copying front portion of valid data row and inserting them to immediate next of the valid data row. CONSTITUTION: An apparatus for implementing guard interval is for removing effect of intersymbol interference and interchannel interference in communication system. A delay device(62-1-62-G) is supplied with the first to nth samples of valid data row(N samples) IFFT(Inverse Fast Fourier Transform) modulated at transmitter and delays the samples by length of the guard interval to output CS(cyclic suffix) data row. A selection device(65) selects one of the valid data row and the delayed CS data row and outputs the delayed CS data row immediately after the valid data row.