Patent ID: 7301989
Filing Date: 2007-11-27
Classification: H04W

Abstract:
1. A wireless communication system transmitting data from a transmitting station to a receiving station using a plurality of subcarriers in parallel, wherein said transmitting station comprises: a channel quality judgment module judging the quality of a channel between said transmitting station and said receiving station for each of said plurality of subcarriers; a channel coding module coding data signals into a code word with an error correcting code; a subcarrier modulation module dividing the code word into a plurality of subcarriers for modulation and modulating the subcarriers each composed of a plurality of symbols; a multi-carrier modulation module combining the plurality of subcarrier-modulated symbols into transmission signals via frequency-time conversion; and a data power setting module setting a transmission power for each of the plurality of subcarriers according to an output from said channel quality judgment module, wherein said receiving station comprises: a demodulation module demodulating signals received from said transmitting station; and a channel decoding module decoding the demodulated received signals, and wherein the transmission power is determined by a first control rule stipulating that, for the plurality of symbols made from a same code word, a transmission power for symbols corresponding to a first subcarrier whose channel quality is judged to be good is set higher than a transmission power for symbols corresponding to a second subcarrier whose channel quality is judged to be poor.