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1. 发明授权

US06215437B1 Procedure for reading the data stored in a transponder and a transponder system for the execution of the procedure 有权
标题翻译：读取存储在应答器和应答器系统中的数据以执行该过程的步骤
公开(公告)号：US06215437B1
公开(公告)日：2001-04-10
申请号：US09382520
申请日：1999-08-25
申请人： Josef H. Schürmann , Konstantin O. Aslanidis , Andreas Hagl
发明人： Josef H. Schürmann , Konstantin O. Aslanidis , Andreas Hagl
IPC分类号： G01S1376
CPC分类号： G06K7/0008 , G01S13/758
摘要： For reading the data stored in a transponder by means of an interrogation device, the interrogation device at first receives the background noise for the purpose of detecting interference frequencies present in this background noise. On the basis of the interference frequencies acquired, coefficients for an adaptive filter are computed by means of which this filter may be tuned in such a way as to suppress the interference frequencies. The response signal from the transponder with the superimposed background noise is received by the interrogation device and routed through the adaptive filter which acts to suppress the interference frequencies. The signal available at the output of the filter can then be demodulated for the purpose of reading the data stored. The transponder system for the execution of the procedure comprises a digital signal processor which computes coefficients for an adaptive filter on the basis of the interference frequencies acquired, and tunes the filter in such a way that the interference frequencies within the RF response signal received from the transponder, carrying the superimposed background noise, are suppressed. The output signal from the adaptive filter may then be used for further processing.
摘要翻译：为了通过询问装置读取存储在转发器中的数据，询问装置首先接收背景噪声，以便检测在该背景噪声中存在的干扰频率。基于所获取的干扰频率，计算自适应滤波器的系数，通过该系数可以以抑制干扰频率的方式调谐该滤波器。具有叠加背景噪声的应答器的响应信号由询问装置接收并通过用于抑制干扰频率的自适应滤波器路由。然后可以对滤波器输出端可用的信号进行解调，以便读取存储的数据。用于执行程序的应答器系统包括数字信号处理器，其基于所获取的干扰频率来计算自适应滤波器的系数，并且以这样的方式调谐滤波器，使得从该接收的RF响应信号中的干扰频率携带叠加背景噪声的转发器被抑制。然后可以将来自自适应滤波器的输出信号用于进一步处理。

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