RADIO COMMUNICATION SYSTEM, RADIO TRANSMISSION DEVICE AND RADIO COMMUNICATION METHOD

摘要

PROBLEM TO BE SOLVED: To provide a radio communication system, radio transmission device, and radio communication method that are able to improve signal detection performance while suppressing transmission power in non-linear MIMO communication.SOLUTION: A base station wirelessly communicates, by a non-linear MIMO system, a signal modulated by an orthogonal frequency division multiplex system. When non-linear precoding by perturbation vector addition is performed, an expanded signal constellation to which each signal point regarded as an equivalent signal point by modulo arithmetic is extended is placed in which a unit signal point grid of a signal point of a prescribed modulation system is placed periodically such that signal points within adjacent grids have placement in which a unit signal point grid is mutually mirror image inverted.