Abstract: A wireless communication apparatus and a wireless communication method wherein even when the permissible delay amount of data is small, the permissible delay thereof can be satisfied. A data type determining part (101) determines whether the delay of transport data or control information should be allowed or not. A pilot signal insertion control part (102) decides, based on pilot insertion interval information and allowable delay information, that a pilot signal is placed adjacently to data that is not allowed to delay. A multiplexing part (106) multiplexes encoded and modulated transport data with the pilot signal generated by a pilot signal generating part (105) in such a manner that realizes the placement decided by the pilot signal insertion control part (102).

Abstract: A radio transmitting apparatus, a radio receiving apparatus and a wireless communication method wherein the channel estimation precision can be improved without increasing the number of pilot signals when two different time-frequency multiplexed physical channel structures are used in an OFDM wireless communication system. A multiplexing part (113) multiplexes, in a previously fixed pattern for each symbol, a pilot symbol generated by a pilot signal generating part (101); a D-ch transport data #1 that has been converted to a QPSK modulated symbol by a D-ch first data processing part (102); a D-ch transport data #2 that has been converted to a modulated symbol by a D-ch second data processing part (105); and L-ch transport data #1 and #2 that have been converted to modulated symbols by an L-ch data processing part (108).