公开(公告)号：US20110074555A1

公开(公告)日：2011-03-31

申请号：US12859799

申请日：2010-08-20

Applicant: Chan-Won Park ,  Man Sik Park ,  Ji-Hoon Bae ,  Donghan Lee ,  Kwang-Soo Cho ,  Won Kyu Choi ,  Cheng-Hao Quan ,  Jeong seok Kim ,  Gil Young Choi ,  Jong-Suk Chae

Inventor： Chan-Won Park ,  Man Sik Park ,  Ji-Hoon Bae ,  Donghan Lee ,  Kwang-Soo Cho ,  Won Kyu Choi ,  Cheng-Hao Quan ,  Jeong seok Kim ,  Gil Young Choi ,  Jong-Suk Chae

IPC: H04Q5/22

CPC classification number: G06K7/0008 ,  G06K7/10297

Abstract: Provided are a mobile Radio Frequency Identification (RFID) device and a data communication method thereof. In the method, a mobile communication terminal unit provides a command to an mRFID reader unit and receives a response to the command from the mRFID reader unit. It is checked whether there is an error in a protocol message of the command or the response, and the command to the mRFID reader unit according to a check result is re-transmitted.

Abstract translation: 提供了一种移动射频识别（RFID）设备及其数据通信方法。 在该方法中，移动通信终端单元向mRFID读取器单元提供命令，并且从mRFID读取器单元接收对该命令的响应。 检查命令或响应的协议消息中是否存在错误，并且重新发送根据检查结果对mRFID读取器单元的命令。

公开(公告)号：US20110064165A1

公开(公告)日：2011-03-17

申请号：US12625699

申请日：2009-11-25

Applicant: Ji-Hoon BAE ,  Donghan LEE ,  Kwang-Soo CHO ,  Man Sik PARK ,  Chan-Won PARK ,  Cheng-Hao QUAN ,  Won Kyu CHOI ,  Gil Young CHOI ,  Jong-Suk CHAE

Inventor： Ji-Hoon BAE ,  Donghan LEE ,  Kwang-Soo CHO ,  Man Sik PARK ,  Chan-Won PARK ,  Cheng-Hao QUAN ,  Won Kyu CHOI ,  Gil Young CHOI ,  Jong-Suk CHAE

IPC: H04L27/22 ,  H04L25/06 ,  H04L27/00 ,  H04Q5/22

CPC classification number: H04L27/06 ,  H04L25/061 ,  H04L27/22

Abstract: A demodulation apparatus for a Radio Frequency Identification (RFID) reader includes: a direct current (DC) offset cancellation unit for cancelling DC-offset noise contained in a PSK-modulated or ASK-modulated subcarrier tag signal from the tag signal when the tag signal is received; and a subcarrier digital demodulator for eliminating a subcarrier from the tag signal from which DC-offset noise has been cancelled to demodulate the DC-offset noise-cancelled tag signal.

Abstract translation: 一种用于射频识别（RFID）读取器的解调装置包括：直流（DC）偏移消除单元，用于当标签信号（DC）偏移消除单元用于消除包含在来自标签信号的PSK调制或ASK调制的子载波标签信号中的DC偏移噪声 被收到 以及子载波数字解调器，用于从已经消除了DC偏移噪声的标签信号中消除副载波，以解调DC偏移噪声消除标签信号。

公开(公告)号：US20100039227A1

公开(公告)日：2010-02-18

申请号：US12348529

申请日：2009-01-05

Applicant: Ji-Hoon BAE ,  Donghan LEE ,  Won Kyu CHOI ,  Cheng-Hao QUAN ,  Gil Young CHOI ,  Jong-Suk CHAE

Inventor： Ji-Hoon BAE ,  Donghan LEE ,  Won Kyu CHOI ,  Cheng-Hao QUAN ,  Gil Young CHOI ,  Jong-Suk CHAE

IPC: H04Q5/22

CPC classification number: H04L27/06 ,  H04L27/22 ,  H04Q2213/13095

Abstract: An apparatus and a method for demodulating a subcarrier tag signal in a radio frequency identification (RFID) reader is provided. The apparatus for demodulating the subcarrier tag signal in the RFID reader may include: an edge signal generation unit receiving a subcarrier tag signal and generating an edge signal with respect to the tag signal; an edge information extraction unit extracting edge information from the generated edge signal; and a decoding unit decoding the tag signal using the extracted edge information.

Abstract translation: 提供了一种用于解调射频识别（RFID）读取器中的子载波标签信号的装置和方法。 用于解调RFID读取器中的子载波标签信号的装置可以包括：边缘信号生成单元，接收副载波标签信号并相对于标签信号产生边缘信号; 边缘信息提取单元，从生成的边缘信号中提取边缘信息; 以及解码单元，使用所提取的边缘信息对标签信号进行解码。

公开(公告)号：US20090109929A1

公开(公告)日：2009-04-30

申请号：US12190990

申请日：2008-08-13

Applicant: Cheng Hao QUAN ,  Hee Sook MO ,  Donghan LEE ,  Ji Hoon BAE ,  Gil Young CHOI ,  Cheol Sig PYO ,  Jong Suk CHAE

Inventor： Cheng Hao QUAN ,  Hee Sook MO ,  Donghan LEE ,  Ji Hoon BAE ,  Gil Young CHOI ,  Cheol Sig PYO ,  Jong Suk CHAE

IPC: H04Q7/36

CPC classification number: G06K7/0008 ,  G06K7/10039 ,  G06K7/10356

Abstract: Provided are a media access method and a reader for performing the media access method in a dense reader environment. The media access method divides an air time between the reader and a tag into a plurality of time slots, and operates in each of the plurality of time slots by using a listen before talking (LBT) technique. The plurality of time slots form a frame. Thus, the media access method can control the reader by performing channel scheduling between each of a plurality of readers and can efficiently recognize tags.

Abstract translation: 提供了一种在密集读取器环境中执行媒体访问方法的媒体访问方法和阅读器。 媒体接入方法将读取器和标签之间的空闲时间分成多个时隙，并且通过使用听话（LBT）技术在多个时隙中的每一个中进行操作。 多个时隙形成一帧。 因此，媒体接入方法可以通过在多个读取器中的每一个之间执行频道调度来控制读取器，并且可以有效地识别标签。

公开(公告)号：US20090086869A1

公开(公告)日：2009-04-02

申请号：US12163339

申请日：2008-06-27

Applicant: Ji-Hoon Bae ,  Hee Sook Mo ,  Donghan Lee ,  ChengHao Quan ,  Gil Young Choi ,  Cheol Sig Pyo

Inventor： Ji-Hoon Bae ,  Hee Sook Mo ,  Donghan Lee ,  ChengHao Quan ,  Gil Young Choi ,  Cheol Sig Pyo

IPC: H04L7/02

CPC classification number: G06K7/0008 ,  G06K7/10297

Abstract: Disclosed are a method and system for receiving a tag signal in a Radio Frequency Identification (RFID) reader. The method includes generating an edge signal using a tag signal received from an RFID tag; extracting edge information from the generated edge signal, and generating an edge clock corresponding to the extracted edge information; and determining bit data with respect to the tag signal using the generated edge clock.

Abstract translation: 公开了一种用于在射频识别（RFID）读取器中接收标签信号的方法和系统。 该方法包括使用从RFID标签接收的标签信号产生边缘信号; 从生成的边缘信号中提取边缘信息，以及生成与所提取的边缘信息相对应的边缘时钟; 以及使用所生成的边缘时钟来确定关于所述标签信号的比特数据。

公开(公告)号：US20050099675A1

公开(公告)日：2005-05-12

申请号：US10896347

申请日：2004-07-20

Applicant: Han Lee ,  Donghan Lee ,  Hee Chung ,  Hyun Lee

Inventor： Han Lee ,  Donghan Lee ,  Hee Chung ,  Hyun Lee

IPC: H04B10/14 ,  H01S3/00 ,  H01S3/067 ,  H01S3/094 ,  H01S3/0941 ,  H01S3/16 ,  H04B10/17

CPC classification number: H04B10/296 ,  H01S3/0064 ,  H01S3/067 ,  H01S3/0677 ,  H01S3/094023 ,  H01S3/0941 ,  H01S3/1608

Abstract: A long-wavelength band (L-band) optical amplifier capable of maintaining a gain constant, thereby providing a stable optical output even when an optical power or a wavelength of a signal input thereto changes. The optical amplifier includes an amplifier which amplifies an input signal, and an amplified spontaneous emission (ASE) reflector which reflects backward ASE generated by the amplifier so that the backward ASE is fed back to the amplifier.

Abstract translation: 即使当光功率或输入信号的波长发生变化时，能够保持增益恒定的长波长带（L波段）光放大器，从而提供稳定的光输出。 光放大器包括放大输入信号的放大器和放大的自发发射（ASE）反射器，其反射由放大器产生的反向ASE，以使反向ASE反馈到放大器。