FIELD: information technology.
SUBSTANCE: pilot signal of the first level for one level transmission is repeated in subbands in the first OFDM character, and the pilot signal of the first level is also repeated with shift from the first OFDM character in the second adjacent OFDM character. Also, additional transmission levels can be transmitted each one of which includes separate pilot signal formed and being repeated in the first character and being repeated with shift from separate pilot signal in the second adjacent character. Then, the first and the second OFDM characters are transmitted and received to characterise receiving channels.
EFFECT: higher efficiency of transmitting pilot signals.
35 cl, 9 dwg
