The particular carrier (the carrier) possessing the carrier structure which is formed with the pilot carrier and the data carrier which become

摘要

PROBLEM TO BE SOLVED: To provide a transmission frame that can follow a change in the response of a transmission line even in the case of high-speed movement. SOLUTION: Q-sets each of pilot carriers used for demodulation reference are arranged at a prescribed interval from the end carrier and arranged consecutively in the time direction on the condition that the number of carriers K is a number that is a multiple of Q+1, where K is number of carriers to be transmitted, Te is an effective symbol length of a transmission symbol, Tg is a guard interval length, R (R=Tg/Te) is the ratio of the guard interval length to the effective symbol length (hereinafter called the guard interval ratio), M is the maximum integer being a reciprocal (1/R) of the guard interval ratio or below (that is, M= (1/R), where and are Gauss' symbols), and Q is an optional integer being M or below.