PRECODING METHOD, PRECODING APPARATUS, TRANSMISSION METHOD, TRANSMISSION APPARATUS, RECEPTION METHOD, AND RECEPTION APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a technique of improving reception quality in an environment where a direct wave is dominant in a transmission method of simultaneously transmitting a plurality of modulation signals from a plurality of antennas.SOLUTION: When a first modulation signal 309A and a second modulation signal 309B are simultaneously transmitted to the same frequency, a precoding weight is multiplied to a baseband signal 307A after a first mapping and a baseband signal 307B after a second mapping. At precoding weight multiplication parts 308A, 308B for outputting the first modulation signal and the second modulation signal, precoding weights are regularly changed.SELECTED DRAWING: Figure 4