Patent ID: 7876842
Filing Date: 2011-01-25
Classification: H04L

Abstract:
1. A multicarrier transmission method in which a transmitter subjects a plurality of subcarriers orthogonal frequency division multiplexing (OFDM)/offset quadrature amplitude modulation (OQAM), and transmits the amplitude-modulated subcarriers to a receiver, the multicarrier transmission method comprising: generating and transmitting, by the transmitter, at least one pilot carrier, which is obtained by modulating one subcarrier among a plurality of subcarriers having a relationship ντ=1/2 where τ represents a symbol interval and ν represents a frequency interval, with a signal sequence including a reference pilot signal sequence represented by any of amplitude modulation vectors {α, α, −α, −α}, {α, −α, −α, α}, {−α, α, α, −α}, and {−α, −α, α, α} where α represents a real number other than 0; and estimating, by the receiver, transmission channel characteristics based on two successive pilot signal demodulation vectors in a time direction which are obtained by demodulating the at least one pilot carrier.