Patent ID: 8275069

Claim:
A transmitting apparatus comprising: a first symbol generation section that selects one point of a plurality of first signal points as a first symbol, the plurality of first signal points being arranged on an IQ plane based on a first mapping pattern; a second symbol generation section that selects one point of a plurality of second signal points as a second symbol, the plurality of second signal points being arranged on the IQ plane based on a second mapping pattern; a first antenna that transmits the first symbol; and a second antenna that transmits the second symbol in a common frequency band and common transmission time with the first symbol, wherein: a plurality of bits are allocated to each of the plurality of first signal points; a first bit set in the plurality of bits is allocated to a first position on the IQ plane; the plurality of first signal points are divided into four groups based on specific two bits in the plurality of bits; in each of the groups, the plurality of first signal points are arranged per first distance in a horizontal direction or in a vertical direction; a minimum distance between signal points in one of the four groups and signal points in a rest of the groups is a second distance which differs from the first distance; the plurality of bits are allocated to each of the plurality of second signal points; the first bit set in the plurality of bits is allocated to a second position on the IQ plane; and the second position and the first position are different.