Patent ID: 7920647
Filing Date: 2011-04-05
Classification: H04B,H04L,H04N

Abstract:
1. A transmitting apparatus comprising: a first symbol generation section that generates a first symbol from first transmission data based on a first mapping pattern; a second symbol generation section that generates a second symbol from second transmission data 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 a common transmission time with the first symbol, wherein: the first mapping pattern assigns the first transmission data to one of a plurality of first signal points arranged on an IQ plane; a plurality of bits are allocated to each of the plurality of first signal points; the plurality of first signal points are divided into four groups by specific two bits of the plurality of bits; in each of the groups, the plurality of first signal points are arranged in each 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 the rest of the groups is a second distance which differs from the first distance; the second mapping pattern assigns the second transmission data to one of a plurality of second signal points arranged on the IQ plane; and the plurality of second signal points include one or more signal points different from the plurality of first signal points.