Patent ID: 9130629
Filing Date: 2015-09-08
Classification: H04B,H04L

Abstract:
1. A base station device that includes a plurality of antennas and makes communication with a plurality of terminal devices each having at least one antenna, comprising: a data modulator a precoding section a radio transmitter spatially multiplexing the plurality of pieces of transmit data after the precoding over a single wireless resource and transmitting a spatially multiplexed signal; and the transform matrix is a unimodular matrix that transforms the first channel matrix into a matrix with high orthogonality; and each of the plurality of the data modulation schemes realizes a different frequency utilization efficiency, and a signal point interval between signal candidate points of the plurality of the different data modulation schemes is an integral multiple of an interval between the signal candidate points of a first data modulation scheme realizing a maximum frequency utilization efficiency among the plurality of the different data modulation schemes.