Patent ID: 8259850

Claim:
An ultra wideband transmitting apparatus that enables transmission in amplitude shift keying modulation mode and transmission in quadrature phase shift keying modulation mode, the ultra wideband transmitting apparatus comprising: a selecting section that selects one of the amplitude shift keying modulation mode and the quadrature phase shift keying modulation mode; and a transmission signal forming section that (1), when the selected mode is the amplitude shift keying modulation mode, generates, according to one bit data, one of (i) a first amplitude shift keying modulation signal which uses a first value as an amplitude level by forming a symbol located in an original point on an in-phase and quadrature plane and (ii) a second amplitude shift keying modulation signal which uses a second value as the amplitude level by forming a symbol located in one of four signal points on the in-phase and quadrature plane and used in quadrature phase shift keying modulation, and (2), when the selected mode is the quadrature phase shift keying modulation mode, generates, according to two bit data, a quadrature phase shift keying modulation signal by forming a symbol located in one of the four signal points on the in-phase and quadrature plane and used in the quadrature phase shift keying modulation.