Patent ID: 8891678

Claim:
A receiving apparatus comprising: (a) a receiver configured to receive, using a plurality of antennas, a multiplexed signal including: (i) a first Orthogonal Frequency Division Multiplexing (OFDM) modulation signal, in which a plurality of subcarriers include, at a first time, a subcarrier carrying a symbol including multiplex information, and include, at a second time, a subcarrier carrying a pilot symbol and a subcarrier carrying a data symbol, in both a first time period and a second time period; and (ii) a second OFDM modulation signal, in which the plurality of subcarriers include, at the first time, a subcarrier carrying a symbol including multiplex information, and include, at the second time, a subcarrier carrying the pilot symbol and a subcarrier carrying the data symbol in the first time period, while in the second time period, an in-phase component and a quadrature-phase component of every subcarrier included in the plurality of subcarriers are zero; and (b) a decoder configured to determine a number associated with multiplexing in the first time period and the second time period using the symbol including multiplex information, and decode the data symbol, wherein the data symbol in the second time in the first period in the first OFDM modulation signal is allocated to a subcarrier of a first frequency and is based on data which is different from data for the data symbol in the second time in the first time period in the second OFDM modulation signal and allocated to the subcarrier of the first frequency.