Patent ID: 9154212
Filing Date: 2015-10-06
Classification: H04B,H04L

Abstract:
1. A radio transmission apparatus comprising: a plurality of transmission antennas; a start-symbol generating unit that generates a start symbol as a reference signal during a start of differential coding; a differential coding unit that subjects a transmission symbol, to which information bits are mapped, to differential coding and generates a symbol after differentiation; and a space-time coding unit that subjects the start symbol or the symbol after differentiation to space-time coding and generates signals to be transmitted from transmission antennas, wherein the differential coding unit determines, on the basis of electric power of the start symbol or electric power of the symbol after differentiation generated last time, electric power of the symbol after differentiation generated in the current differential coding processing, wherein the differential coding unit includes: a unit that calculates electric power of the start symbol or the symbol after differentiation generated last time; a unit that calculates 1/square-root of the electric power; and a unit that generates the symbol after differentiation on the basis of the transmission symbol, the start symbol or the symbol after differentiation generated last time, and the 1/square-root of the electric power.