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MULTIPLE SUBCARRIERS MODULATOR, BACKSCATTER DEVICE AND HUB DEVICE IN A BACKSCATTER COMMUNICATION SYSTEM
MULTIPLE SUBCARRIERS MODULATOR, BACKSCATTER DEVICE AND HUB DEVICE IN A BACKSCATTER COMMUNICATION SYSTEM
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机译:反向散射通信系统中的多个子载波调制器,反向散射设备和集线器设备
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摘要
A multiple subcarriers modulator (200) for a backscatter device comprised in a backscatter communication system is disclosed. The multiple subcarriers modulator comprises an antenna switch (210) and an impedance matrix (220) comprising a number of impedances. The multiple subcarriers modulator further comprises a first modulator (230) configured to generate a first modulated signal by modulating a first data stream with a first subcarrier having a first frequency and a second modulator (240) configured to generate a second modulated signal by modulating a second data stream with a second subcarrier having a second frequency. The multiple subcarriers modulator further comprises a summing circuit (250) configured to generate a control signal by combining the first and second modulated signals and a switch controller (270) configured to control the antenna switch such that one of the impedance in the impedance matrix is connected to an antenna based on the control signal.
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