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1. 发明申请

WO2009054568A1 RFID READER SUPPORTING DENSE MODE USING FFT ALGORITHM 审中-公开
标题翻译： RFID读写器支持使用FFT算法的DENSE模式
公开(公告)号：WO2009054568A1
公开(公告)日：2009-04-30
申请号：PCT/KR2008/000042
申请日：2008-01-04
申请人： VICTEK CO., LTD. , JO, Won Sang , CHOI, Sun Ho , KIM, Gwan Tae , JIN, In Chur , CHOI, Won , CHOI, Myeong Ryeol , SHIM, Seong Yong
发明人： JO, Won Sang , CHOI, Sun Ho , KIM, Gwan Tae , JIN, In Chur , CHOI, Won , CHOI, Myeong Ryeol , SHIM, Seong Yong
IPC分类号： H04B5/02
CPC分类号： G06K7/0008
摘要： Disclosed herein is a passive Radio Frequency Identification (RFID) reader supporting a dense mode using a Fast Fourier Transform (FFT). The RFID reader includes a modulator, a Radio Frequency (RF) transmitter, an RF receiver, a demodulator, a coupler, an FFT receiver, and a microcontroller. The modulator encodes and modulates interrogation signals, and converts resulting signals into analog signals. The RF transmitter performs up- conversion and power amplification on the analog signals, and radiates resulting signals. The RF receiver receives response signals, and performs frequency down-conversion and power amplification on the response signals. The demodulator converts the response signals into digital signals, and demodulates and decodes the digital signals. The coupler samples interrogation signals. The FFT receiver scans the frequency channels of the interrogation signals using an FFT algorithm. The microcontroller receives the results of the scanning, detects a currently unoccupied frequency channel, and communicates with a tag using the frequency channel.
摘要翻译：本文公开了一种使用快速傅里叶变换（FFT）支持密集模式的无源射频识别（RFID）读取器。 RFID读取器包括调制器，射频（RF）发射器，RF接收器，解调器，耦合器，FFT接收器和微控制器。调制器对询问信号进行编码和调制，并将结果信号转换为模拟信号。 RF发射机对模拟信号进行上变频和功率放大，并辐射出结果信号。 RF接收机接收响应信号，并对响应信号进行降频转换和功率放大。解调器将响应信号转换为数字信号，并对数字信号进行解调和解码。耦合器采样询问信号。 FFT接收机使用FFT算法扫描询问信号的频道。微控制器接收扫描结果，检测当前未被占用的频道，并使用频道与标签进行通信。

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