Method and apparatus of transmitting pilot symbols in orthogonal frequency division multiplexing based communication system, method and apparatus of receiving the pilot symbols

摘要

The orthogonal frequency division multiplexing transmission method based on the pilot symbols for channel estimation in a communication system and apparatus, the receiving method and apparatus. Pilot symbol transmission method according to the invention, in a pilot symbol transmission method in an orthogonal frequency division multiplexing-based communication system, (a) performs an IFFT by mapping the pilot tone frequencies assigned to each terminal for the pilot symbols to be transmitted, the step of; And (b) it characterized in that it comprises the step to separate the even-numbered pilot symbols and the odd-numbered pilot symbols perform IFFT to give a phase rotation only on one side of which a pilot symbol. Thereby, there is an advantage that the frequency can increase the sampling rate of wireless channel estimation without a loss in bandwidth efficiency in the process of channel estimation.