Patent ID: 8743993

Claim:
A transmitting device that transmits at least one multicarrier signal to a receiving device, wherein the transmitting device is included in a communication system, where the communication system includes a plurality of transmitting devices, the transmitting device comprising: a receiving unit configured to receive, from the receiving device, information to determine an amount of phase rotation for each of subcarriers to estimate a channel response, the amount of phase rotation is set for each transmitting device; an assigning unit configured to assign a sequence of code length N as a sequence to estimate a channel response to each of the subcarriers; a phase rotating unit configured to apply phase rotation to the sequence, wherein phase difference between adjacent subcarriers is fixed based on the received information; and a transmitting unit configured to transmit at least one signal including the sequence that said phase rotation is applied, wherein in case that said fixed phase difference between adjacent subcarriers is represented by θ, θ satisfied N×θ=2mπ, wherein N is an integer, wherein m is an integer not less than 1, and wherein the transmitting unit transmits said at least one signal including the sequence at the same timing with the use of the same frequency as another transmitting device.