mapping rule and furthermore the configuring unit 21 can further map the dedicated pilot to a port according to the preset mapping rule before the dedicated pilot is configured with the orthogonal sequence the transmitting unit 22 is configured to transmit the dedicated pilot in a code division multiplexing cdm mode or in a hybrid cdm and frequency division multiplexing fdm mode for a system at a transmission rank of 3 to 8 an orthogonal sequence and a mapping rule adopted for a first stream are the same as those at a transmission rank of 1 or 2 and an orthogonal sequence and a mapping rule adopted for a second stream are the same as those at a transmission rank of 2 for a system at a transmission rank of 5 to 8 an orthogonal sequence and a mapping rule adopted for a third stream are the same as those at a transmission rank of 3 or 4 and an orthogonal sequence and a mapping rule adopted for a transmitted stream are the same as those at a transmission rank of 4 the same set of orthogonal sequences is adopted for groups of ports mapped into different resources or groups of ports mapped into different resources are configured respectively with different sets of orthogonal sequences in a recommended design groups of ports mapped into different resources are configured respectively with different sets of.