TRANSMISSION AND RECEPTION DEVICE, AND COMMUNICATION METHOD THEREOF

摘要

PROBLEM TO BE SOLVED: To perform efficient cognitive radio communication with simple constitution while avoiding interference with a Primary system. SOLUTION: Signal detectors 15-1 and 15-2 detect two reception signals having time intervals T1 and T2. A power comparator 15-3 compares received power of the two detected reception signals with each other and a signal selector 15-4 selects a reception signal having a larger received power. A reception weight calculator 15-5 generates a correlation matrix of the reception signal and minimizes the electric power on the basis of information on the selected reception signal to calculate a weight value for interference removal. A reception weight multiplier 17 multiplies the reception signal by a branched weighting value and outputs the resulting signal as an output signal. A transmission signal weight multiplier 18 multiplies the branched weight value by transmission signals branched into the same number as the number of a plurality of antenna elements. COPYRIGHT: (C)2008,JPO&INPIT