Patent ID: 8081697
Filing Date: 2011-12-20
Classification: H04B,H04L

Abstract:
1. A transmitting apparatus in a Spatial Multiplexing (SM) communication system comprising: a generator for generating a plurality of transmit streams by spatial-multiplexing; a determiner for determining at least two modulation schemes to be respectively applied to the plurality of the transmit streams and for determining power weights to be respectively applied to the plurality of the transmit streams; and a modulator for modulating the plurality of the transmit streams using the at least two modulation schemes under control of the determiner, wherein the determining of the power weights is according to the determined at least two modulation schemes, wherein the at least two modulation schemes and the power weights to be respectively applied to the plurality of transmit streams are acquired from a look-up table, wherein the modulation schemes to be respectively applied to the plurality of the transmit streams comprise modulation schemes determined in accordance with a spectral efficiency and a number of transmit antennas, and wherein the determiner generates possible modulation scheme sets which exclude sets including the same modulation schemes and selects a modulation scheme set by comparing values for each modulation scheme set and by selecting a modulation scheme set corresponding to a smallest value.