Patent attributes
A MIMO transmitting apparatus wherein a low power consumption and a high performance can be achieved by taking the influence of variation in communication distance into account. In this apparatus, a low power consumption design part (701) selectively decides, based on the distance from the other end of communication, whether to perform a pre-coding. When deciding to perform the pre-coding, the low power consumption design part (701) instructs a modulating part (702) to perform a low-order QAM modulation, while instructing a pre-coding part (703) to perform a pre-coding. When instructed to perform a low-order QAM modulation, the modulating part (702) uses a low-order QAM modulation scheme to modulate an input information bit sequence. When instructed to perform a pre-coding, the pre-coding part (703) uses a pre-coding matrix to pre-process the input information bit sequence.
