公开(公告)号：US07728714B2

公开(公告)日：2010-06-01

申请号：US11522965

申请日：2006-09-19

申请人： Ji-hun Koo ,  Woo-shik Kang ,  Jin-young Yang ,  Seon-wook Kim ,  Seok-joong Hwang

发明人： Ji-hun Koo ,  Woo-shik Kang ,  Jin-young Yang ,  Seon-wook Kim ,  Seok-joong Hwang

IPC分类号： H04Q5/22

CPC分类号： H04B5/0062 ,  G06K7/10297

摘要： When a reader of a Radio Frequency Identification (RF-ID) system sends out a command signal to the RF-ID tag and receives a response signal from the RF-ID tag, an End of Signal (EOS) of the received response signal is detected such that the next command signal can be transmitted within a time. Accordingly, response signal can be detected even under the environment of poor signal to noise ratio performance, and the EOS of the response signal from the RF-ID tag can be recognized with ease and speed.

摘要翻译： 当射频识别（RF-ID）系统的读取器向RF-ID标签发出命令信号并从RF-ID标签接收到响应信号时，所接收的响应信号的信号结束（EOS）为 检测到下一个命令信号可以在一段时间内传输。 因此，即使在差的信噪比性能的环境下也能够检测到响应信号，并且可以容易且快速地识别来自RF-ID标签的响应信号的EOS。

公开(公告)号：US20070120648A1

公开(公告)日：2007-05-31

申请号：US11522965

申请日：2006-09-19

申请人： Ji-hun Koo ,  Woo-shik Kang ,  Jin-young Yang ,  Seon-wook Kim ,  Seok-joong Hwang

发明人： Ji-hun Koo ,  Woo-shik Kang ,  Jin-young Yang ,  Seon-wook Kim ,  Seok-joong Hwang

IPC分类号： H04Q5/22

CPC分类号： H04B5/0062 ,  G06K7/10297

摘要： When a reader of a Radio Frequency Identification (RF-ID) system sends out a command signal to the RF-ID tag and receives a response signal from the RF-ID tag, an End of Signal (EOS) of the received response signal is detected such that the next command signal can be transmitted within a time. Accordingly, response signal can be detected even under the environment of poor signal to noise ratio performance, and the EOS of the response signal from the RF-ID tag can be recognized with ease and speed.

摘要翻译： 当射频识别（RF-ID）系统的读取器向RF-ID标签发出命令信号并从RF-ID标签接收到响应信号时，所接收的响应信号的信号结束（EOS）为 检测到下一个命令信号可以在一段时间内传输。 因此，即使在差的信噪比性能的环境下也能够检测到响应信号，并且可以容易且快速地识别来自RF-ID标签的响应信号的EOS。

公开(公告)号：US20070086546A1

公开(公告)日：2007-04-19

申请号：US11543128

申请日：2006-10-05

申请人： Ji-hun Koo ,  Seon-wook Kim ,  Seok-joong Hwang

发明人： Ji-hun Koo ,  Seon-wook Kim ,  Seok-joong Hwang

IPC分类号： H04L27/06

CPC分类号： H04L25/069

摘要： A baseband receiver using a transition trigger and a method thereof are disclosed. The baseband receiver is provided in a radio frequency identification (RFID) reader in order to receive a pulse amplitude modulation (PAM) signal, and can improve a bit error rate (BER) performance by mapping transition waveforms generated whenever the received signal is triggered on new symbols, and filtering the new symbols to recover to the original symbols. Since no complex and high performance DC drift estimator is required and DC drifts can stably be removed along with white noise among noise components, it is possible to improve BER.

摘要翻译： 公开了一种使用转换触发器的基带接收机及其方法。 基带接收机设置在射频识别（RFID）读取器中，以便接收脉冲幅度调制（PAM）信号，并且可以通过映射每当触发接收信号时产生的转换波形来提高误码率（BER）性能 新符号，并对新符号进行滤波以恢复原始符号。 由于不需要复杂和高性能的直流漂移估计器，并且可以在噪声分量之间与白噪声一起稳定地去除直流漂移，因此可以提高误码率。