A transmitting method, comprising: configuring a frame using a plurality of orthogonal frequency-division multiplexing, OFDM, symbols, by allocating a plurality of transmission data to a plurality of time-frequency regions each of which is identified by at least one time resource among a plurality of time resources and at least one frequency resource among a plurality of frequency resources; and transmitting the frame, wherein the frame includes a first period in which a preamble which includes information on a frame configuration of the frame is transmitted, and a second period in which the plurality of transmission data are transmitted by at least one of time division and frequency division, the second period includes a first time-frequency region (6701; 6703) among the plurality of time-frequency regions, characterized in that first data symbols (6901; 7001) generated from first transmission data among the plurality of transmission data and second data symbols (6902; 7002) generated from second transmission data among the plurality of transmission data are, starting from a leading end of the first time-frequency region (6701; 6703), sequentially multiplexed into the first time-frequency region (6701; 6703), and dummy symbols (6904; 7004) are inserted subsequent to the second data symbols (6902; 7002) to fill that part of the first time-frequency region (6701; 6703) into which no data symbols (6901, 6902, 6903; 7001, 7002, 7003) are multiplexed, wherein quadrature components of the dummy symbols have zero amplitudes, and in-phase components of the dummy symbols are generated from a pseudo-random sequence and set to +1 or -1. configuring a frame using a plurality of orthogonal frequency-division multiplexing, OFDM, symbols, by allocating a plurality of transmission data to a plurality of time-frequency regions each of which is identified by at least one time resource among a plurality of time resources and at least one frequency resource among a plurality of frequency resources; and transmitting the frame, wherein the frame includes a first period in which a preamble which includes information on a frame configuration of the frame is transmitted, and a second period in which the plurality of transmission data are transmitted by at least one of time division and frequency division, the second period includes a first time-frequency region (6701; 6703) among the plurality of time-frequency regions, characterized in that first data symbols (6901; 7001) generated from first transmission data among the plurality of transmission data and second data symbols (6902; 7002) generated from second transmission data among the plurality of transmission data are, starting from a leading end of the first time-frequency region (6701; 6703), sequentially multiplexed into the first time-frequency region (6701; 6703), and dummy symbols (6904; 7004) are inserted subsequent to the second data symbols (6902; 7002) to fill that part of the first time-frequency region (6701; 6703) into which no data symbols (6901, 6902, 6903; 7001, 7002, 7003) are multiplexed, wherein quadrature components of the dummy symbols have zero amplitudes, and in-phase components of the dummy symbols are generated from a pseudo-random sequence and set to +1 or -1. <EOS>