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LOW-COST SOFTWARE-DEFINED RFID INTERROGATOR WITH ACTIVE TRANSMIT LEAKAGE CANCELLATION
LOW-COST SOFTWARE-DEFINED RFID INTERROGATOR WITH ACTIVE TRANSMIT LEAKAGE CANCELLATION
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机译:具有主动发送泄漏取消功能的低成本软件定义RFID询问机
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摘要
An RFID interrogator transceiver with various improvements is proposed. A digital interface element implemented in a field-programmable gate array permits the use of a low-cost, low pin count microcontroller unit to control various integrated circuits within the transceiver both with the complexity afforded by the microcontroller unit and with the speed afforded by the field-programmable gate array. A transmit waveform generation architecture which can store opcodes in a segmented random access memory permits both leisurely loading of information over a digital interface from a low-cost microcontroller unit and fast playback over a wireless interface during low-latency RFID exchanges. Finally, a dual digital second-order resonator infinite-impulse-response filter permits a more hardware efficient channel bandpass filter solution than a finite-impulse-response filter and can be easily adjusted to accommodate RFID backscatter link frequencies and frequency tolerances.
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