Method for transmitting data using variable guard interval and apparatus thereof

摘要

In an orthogonal frequency division multiplexing (OFDM) wireless communication system, when path delay information is received from a reception apparatus through a return path after data transmission, a length of a cyclic prefix included in a transmitted signal is adjusted on the basis of a delay value included in the path delay information.

主权项

1. A method for transmitting data in an orthogonal frequency division multiplexing (OFDM) wireless communication system, the method comprising: receiving path delay information from a reception apparatus through a return path, after data transmission; adjusting a length of a cyclic prefix (CP) based on a delay value included in the path delay information; receiving error information from the reception apparatus through the return path; obtaining a bit error rate (BER) from the error information; comparing the obtained BER with a pre-set BER; adjusting a number of pilot symbols when the obtained BER is lower than the pre-set BER; and performing data transmission using the CP having the adjusted length and the adjusted number of pilot symbols.