Patent ID: 8576942
Filing Date: 2013-11-05
Classification: H04L

Abstract:
1. A transmitter for receiving an IQ signal, and outputting a transmission signal, the transmitter comprising: a decoder for transforming the IQ signal into a linear sum of two vectors which have non-negative coefficients, respectively, which form an angle of (π/4), and which are included in eight vectors representing directions indicated by eight angels of (−π/2), 0, (π/2), π, (−3π/4), (−π/4), (π/4), and (3π/4), respectively, and for outputting information upon magnitudes and angles of the two vectors; a phase generator for generating eight phase signals corresponding to phases of (−π/2), 0, (π/2), π, (−3π/4), (−π/4), (π/4), and (3π/4), respectively, and outputting the eight phase signals; a selector for selecting two phase signals having phases equivalent to angles of the two vectors, from among the eight phase signals, and amplifying the two phase signals having been selected, based on the information upon the magnitudes and the angles of the two vectors, and outputting, as a plurality of amplification signals, the two phase signals having been amplified; and a combiner for combining the plurality of amplification signals with each other, and outputting a combined signal as the transmission signal, wherein the selector includes: