<![CDATA[Index modulation conveys more data given to indices of status of communication transmission item such as antenna and subcarrier. In this proposed system, we gave the index to the conditions of impedance matching or not. In the transmitter, antenna chooses one impedance according to the mapping table as active impedance. The receiver detects impedance index comparing of impedance between received signal and receivers. The proposed system improves not only transmitted information data by using impedance index but also spectral efficiency. In the simulation, Spectral Efficiency (SE) and Bit Error Rate (BER) were analyzed and compared to conventional modulation scheme.]]>
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