Radio transmission apparatus, radio reception apparatus and radio transmission method

摘要

A radio transmission apparatus capable of enhancing the diversity effect. In this apparatus, phase rotation section (102) performs phase rotation processing of 40.6°=26.6°+14.0°, interleavers ( 106,111 ) perform two-time interleaving processing before IQ combining processing performed in a combining section ( 107 ) and after IQ separation processing performed in an IQ separating section ( 108 ), and the original modulation symbol obtained in a mapping section ( 101 ) is thereby dispersed and mapped to/at signal points of M-ary modulation level higher two ranks or more (for example, from a QPSK symbol to 256QAM symbols).