公开(公告)号：US20080088453A1

公开(公告)日：2008-04-17

申请号：US11974199

申请日：2007-10-11

申请人： Yasuhito Kiji ,  Yasuo Matsumoto ,  Kouichi Sano ,  Masakazu Kato ,  Nobuo Murofushi ,  Takahiro Shimura

发明人： Yasuhito Kiji ,  Yasuo Matsumoto ,  Kouichi Sano ,  Masakazu Kato ,  Nobuo Murofushi ,  Takahiro Shimura

IPC分类号： G08B13/14

CPC分类号： G06K7/0008 ,  G06K7/10039

摘要： A radio communication apparatus sends a signal for assigning a predetermined number of slots to one or more response devices. The response devices individually select one slot, and transmit own specific identification information in that slot. The radio communication apparatus has an all slot number counter and an empty slot number counter. The all slot number counter counts the number of all slots received within a slot counting period. The empty slot number counter counts empty slots among those received within the slot counting period. The radio communication apparatus calculates an estimated number of unread response devices whose identification information is not yet read, from the counted values of each counter and the number of slots at the present time. And, based on the estimated number of unread response devices, the radio communication apparatus determines the number of slots to be assigned next.

摘要翻译： 无线通信装置向一个或多个响应装置发送用于分配预定数量的时隙的信号。 响应设备单独选择一个时隙，并在该时隙中发送自己的特定标识信息。 无线通信装置具有全时隙号计数器和空时隙号计数器。 所有时隙号计数器计数在时隙计数周期内接收的所有时隙的数量。 空插槽号计数器计数在插槽计数周期内接收的那些空插槽。 无线电通信装置根据每个计数器的计数值和当前时隙的数量来计算其尚未读取识别信息的未读响应装置的估计数。 并且，基于未被读取的响应装置的估计数，无线通信装置确定接下来要分配的时隙数。

公开(公告)号：US08023579B2

公开(公告)日：2011-09-20

申请号：US12148113

申请日：2008-04-16

申请人： Kouichi Sano ,  Yasuo Matsumoto ,  Masakazu Kato ,  Takahiro Shimura

发明人： Kouichi Sano ,  Yasuo Matsumoto ,  Masakazu Kato ,  Takahiro Shimura

IPC分类号： H04L5/12 ,  H04L23/02

CPC分类号： H03D3/007 ,  H04L7/042 ,  H04L27/2273

摘要： A quadrature demodulation device effectively utilizes the result of quadrature detection in order to improve demodulation efficiency. The quadrature modulation device includes a quadrature detector DT which performs quadrature detection on a reception signal obtained by receiving a radio wave from a radio frequency identification tag, to generate an in-phase signal and a quadrature-phase signal, and a demodulation circuit DM which detects a preamble of a particular transition pattern in at least one of the in-phase signal and the quadrature-phase signal and which decodes the at least one of the in-phase signal and the quadrature-phase signal to obtain data succeeding the preamble, the demodulation circuit DM further performing error detection on a decoding result to check for errors.

摘要翻译： 正交解调装置有效利用正交检测的结果，以提高解调效率。 正交调制装置包括正交检波器DT，其对通过从射频识别标签接收无线电波而获得的接收信号进行正交检测，以产生同相信号和正交相位信号，以及解调电路DM 在同相信号和正交相信号中的至少一个中检测特定转变模式的前同步码，并且对同相信号和正交相位信号中的至少一个进行解码以获得跟随前导码的数据， 解调电路DM还对解码结果执行错误检测以检查错误。

公开(公告)号：US20080231425A1

公开(公告)日：2008-09-25

申请号：US12148113

申请日：2008-04-16

申请人： Kouichi Sano ,  Yasuo Matsumoto ,  Masakazu Kato ,  Takahiro Shimura

发明人： Kouichi Sano ,  Yasuo Matsumoto ,  Masakazu Kato ,  Takahiro Shimura

IPC分类号： G08C17/02

CPC分类号： H03D3/007 ,  H04L7/042 ,  H04L27/2273

摘要： A quadrature demodulation device effectively utilizes the result of quadrature detection in order to improve demodulation efficiency. The quadrature modulation device includes a quadrature detector DT which performs quadrature detection on a reception signal obtained by receiving a radio wave from a radio frequency identification tag, to generate an in-phase signal and a quadrature-phase signal, and a demodulation circuit DM which detects a preamble of a particular transition pattern in at least one of the in-phase signal and the quadrature-phase signal and which decodes the at least one of the in-phase signal and the quadrature-phase signal to obtain data succeeding the preamble, the demodulation circuit DM further performing error detection on a decoding result to check for errors.

摘要翻译： 正交解调装置有效利用正交检测的结果，以提高解调效率。 正交调制装置包括正交检波器DT，其对通过从射频识别标签接收无线电波而获得的接收信号进行正交检测，以产生同相信号和正交相位信号，以及解调电路DM 在同相信号和正交相信号中的至少一个中检测特定转变模式的前同步码，并且对同相信号和正交相位信号中的至少一个进行解码以获得跟随前导码的数据， 解调电路DM还对解码结果执行错误检测以检查错误。

公开(公告)号：US20050077353A1

公开(公告)日：2005-04-14

申请号：US10958680

申请日：2004-10-06

申请人： Sadatoshi Oishi ,  Masakazu Kato ,  Naohiro Matsushita ,  Koichi Sano ,  Nobuo Murofushi ,  Yasuo Matsumoto

发明人： Sadatoshi Oishi ,  Masakazu Kato ,  Naohiro Matsushita ,  Koichi Sano ,  Nobuo Murofushi ,  Yasuo Matsumoto

IPC分类号： G06K7/10 ,  G06K17/00 ,  G06K19/07 ,  G06K19/077 ,  G06F17/60

CPC分类号： G06K19/07786 ,  G06K7/0008 ,  G06K7/10316 ,  G06K7/10346 ,  G06K7/10554 ,  G06K19/0723 ,  G06K19/07749 ,  G06K19/07796

摘要： An RF tag reading apparatus reads information from RF tags affixed to postal envelopes by a single operation. An article container contains a large number of postal envelopes provided with RF tags. A reader antenna, which is connected to an interrogator via a coaxial cable, is disposed under the article container. Maximum gain directions of the RF tags of the respective postal envelopes are uniformly directed to the reader antenna. The respective postal envelopes contained in the article container are arranged face to face with each other in a direction orthogonal to the maximum directions of the RF tags. Since a maximum gain direction of the reader antenna is oriented toward a base end surface of the article container, the maximum gain directions of the RF tags are opposed to the maximum gain direction of the reader antenna.

摘要翻译： RF标签读取装置通过单次操作从附加到邮政信封的RF标签读取信息。 物品容器包含大量带RF标签的邮政信封。 通过同轴电缆连接到询问器的读取器天线设置在物品容器下方。 各个邮政信封的RF标签的最大增益方向均匀地指向读取器天线。 包含在物品容器中的各个邮政信封在与RF标签的最大方向正交的方向上彼此面对地布置。 由于读取器天线的最大增益方向朝向物品容器的基端面，所以RF标签的最大增益方向与读取器天线的最大增益方向相反。

公开(公告)号：US20070164107A1

公开(公告)日：2007-07-19

申请号：US11723843

申请日：2007-03-22

申请人： Sadatoshi Oishi ,  Masakazu Kato ,  Naohiro Matsushita ,  Koichi Sano ,  Nobuo Murofushi ,  Yasuo Matsumoto

发明人： Sadatoshi Oishi ,  Masakazu Kato ,  Naohiro Matsushita ,  Koichi Sano ,  Nobuo Murofushi ,  Yasuo Matsumoto

IPC分类号： G06Q30/00 ,  G06K7/08

CPC分类号： G06K19/07786 ,  G06K7/0008 ,  G06K7/10316 ,  G06K7/10346 ,  G06K7/10554 ,  G06K19/0723 ,  G06K19/07749 ,  G06K19/07796

摘要： An RF tag reading apparatus reads information from RF tags affixed to postal envelopes by a single operation. An article container contains a large number of postal envelopes provided with RF tags. A reader antenna, which is connected to an interrogator via a coaxial cable, is disposed under the article container. Maximum gain directions of the RF tags of the respective postal envelopes are uniformly directed to the reader antenna. The respective postal envelopes contained in the article container are arranged face to face with each other in a direction orthogonal to the maximum directions of the RF tags. Since a maximum gain direction of the reader antenna is oriented toward a base end surface of the article container, the maximum gain directions of the RF tags are opposed to the maximum gain direction of the reader antenna.

摘要翻译： RF标签读取装置通过单次操作从附加到邮政信封的RF标签读取信息。 物品容器包含大量带RF标签的邮政信封。 通过同轴电缆连接到询问器的读取器天线设置在物品容器下方。 各个邮政信封的RF标签的最大增益方向均匀地指向读取器天线。 包含在物品容器中的各个邮政信封在与RF标签的最大方向正交的方向上彼此面对地布置。 由于读取器天线的最大增益方向朝向物品容器的基端面，所以RF标签的最大增益方向与读取器天线的最大增益方向相反。

公开(公告)号：US20060097047A1

公开(公告)日：2006-05-11

申请号：US11311372

申请日：2005-12-20

申请人： Sadatoshi Oishi ,  Masakazu Kato ,  Naohiro Matsushita ,  Koichi Sano ,  Nobuo Murofushi ,  Yasuo Matsumoto

发明人： Sadatoshi Oishi ,  Masakazu Kato ,  Naohiro Matsushita ,  Koichi Sano ,  Nobuo Murofushi ,  Yasuo Matsumoto

IPC分类号： G06Q30/00

CPC分类号： G06K19/07786 ,  G06K7/0008 ,  G06K7/10316 ,  G06K7/10346 ,  G06K7/10554 ,  G06K19/0723 ,  G06K19/07749 ,  G06K19/07796

摘要： An RF tag reading apparatus reads information from RF tags affixed to postal envelopes by a single operation. An article container contains a large number of postal envelopes provided with RF tags. A reader antenna, which is connected to an interrogator via a coaxial cable, is disposed under the article container. Maximum gain directions of the RF tags of the respective postal envelopes are uniformly directed to the reader antenna. The respective postal envelopes contained in the article container are arranged face to face with each other in a direction orthogonal to the maximum directions of the RF tags. Since a maximum gain direction of the reader antenna is oriented toward a base end surface of the article container, the maximum gain directions of the RF tags are opposed to the maximum gain direction of the reader antenna.

摘要翻译： RF标签读取装置通过单次操作从附加到邮政信封的RF标签读取信息。 物品容器包含大量带RF标签的邮政信封。 通过同轴电缆连接到询问器的读取器天线设置在物品容器下方。 各个邮政信封的RF标签的最大增益方向均匀地指向读取器天线。 包含在物品容器中的各个邮政信封在与RF标签的最大方向正交的方向上彼此面对地布置。 由于读取器天线的最大增益方向朝向物品容器的基端面，所以RF标签的最大增益方向与读取器天线的最大增益方向相反。

公开(公告)号：US07619466B2

公开(公告)日：2009-11-17

申请号：US11881876

申请日：2007-07-30

申请人： Sadatoshi Oishi ,  Nobuo Murofushi ,  Masakazu Kato

发明人： Sadatoshi Oishi ,  Nobuo Murofushi ,  Masakazu Kato

IPC分类号： H04L27/22

CPC分类号： H04L27/06 ,  H04L27/233

摘要： A quadrature demodulator includes a reception section which receives a signal transmitted by an RFID tag and containing a specific pattern and data following the specific pattern and multiplies the reception signal by a local signal to generate an I-signal, while multiplying the reception signal by the local signal shifted in phase by 90 degrees to generate a Q-signal, a first demodulating circuit which squares the I- and Q-signals and adding the resulting I- and Q-signals together to generate data on the basis of the addition result, a second demodulating circuit which detects the specific pattern in the I- and Q-signals to decode the data following one of the detected specific patterns, and a control section which selects one of the first and second demodulating circuits in accordance with a gain determined by the result of the addition between the values of the squared I- and Q-signals.

摘要翻译： 正交解调器包括接收部分，其接收由RFID标签发送的信号，并且包含特定模式和跟随特定模式的数据，并将接收信号乘以本地信号以产生I信号，同时将接收信号乘以 本地信号相移90度以产生Q信号，第一解调电路对I和Q信号进行平方并将所产生的I和Q信号相加在一起，以基于相加结果生成数据， 第二解调电路，其检测所述I和Q信号中的特定模式以解码所述检测到的特定模式之一之后的数据;以及控制部分，其根据由所述第一和第二解调电路确定的增益来选择所述第一和第二解调电路中的一个， 在I和Q信号的平方的值之间相加的结果。

公开(公告)号：US20080024208A1

公开(公告)日：2008-01-31

申请号：US11881876

申请日：2007-07-30

申请人： Sadatoshi Oishi ,  Nobuo Murofushi ,  Masakazu Kato

发明人： Sadatoshi Oishi ,  Nobuo Murofushi ,  Masakazu Kato

IPC分类号： H03D3/00 ,  H04L27/22

CPC分类号： H04L27/06 ,  H04L27/233

摘要： A quadrature demodulator includes a reception section which receives a signal transmitted by an RFID tag and containing a specific pattern and data following the specific pattern and multiplies the reception signal by a local signal to generate an I-signal, while multiplying the reception signal by the local signal shifted in phase by 90 degrees to generate a Q-signal, a first demodulating circuit which squares the I- and Q-signals and adding the resulting I- and Q-signals together to generate data on the basis of the addition result, a second demodulating circuit which detects the specific pattern in the I- and Q-signals to decode the data following one of the detected specific patterns, and a control section which selects one of the first and second demodulating circuits in accordance with a gain determined by the result of the addition between the values of the squared I- and Q-signals.

摘要翻译： 正交解调器包括接收部分，其接收由RFID标签发送的信号，并且包含特定模式和跟随特定模式的数据，并将接收信号乘以本地信号以产生I信号，同时将接收信号乘以 本地信号相移90度以产生Q信号，第一解调电路对I和Q信号进行平方并将所产生的I和Q信号相加在一起，以基于相加结果生成数据， 第二解调电路，其检测所述I和Q信号中的特定模式以解码所述检测到的特定模式之一之后的数据;以及控制部分，其根据由所述第一和第二解调电路确定的增益来选择所述第一和第二解调电路中的一个， 在I和Q信号的平方的值之间相加的结果。

公开(公告)号：US20080175305A1

公开(公告)日：2008-07-24

申请号：US12002487

申请日：2007-12-17

申请人： Nobuo Murofushi ,  Masakazu Kato

发明人： Nobuo Murofushi ,  Masakazu Kato

IPC分类号： H04B1/713

CPC分类号： H04B1/7143 ,  H04B2001/71365 ,  H04B2001/7154

摘要： A hopping pattern setting section sets, as a frequency hopping pattern code, elements of a matrix in which all integers of “1” to “the number of frequencies to be used” appear only once and which is obtained by adding, as an offset, any one of integers of “0” to “(the number of frequencies to be used)−1” to each of elements of a matrix obtained by excluding integers larger than the number of frequencies to be used from a matrix in which all integers of “1” to “(prime number larger than the number of frequencies to be used)−1” appear only once. A frequency oscillation section converts the frequency hopping pattern code into the frequencies to be used to output unmodulated signals of the frequencies to a transmission section and a reception section.

摘要翻译： 跳频图案设置部分将跳频图形代码设置为“1”到“要使用的频率数”的矩阵的元素仅出现一次，并且通过将作为偏移量的相加， 通过排除大于从要使用的频率的数目的整数得到的矩阵的每个元素的“0”到“（要使用的频率的数量）-1”的整数中的任何一个，其中所有矩阵的所有整数 “1”到“（素数大于要使用的频率的数量）-1”只出现一次。 频率振荡部分将跳频图案代码转换成用于将频率的未调制信号输出到发送部分和接收部分的频率。

公开(公告)号：US08000375B2

公开(公告)日：2011-08-16

申请号：US12002487

申请日：2007-12-17

申请人： Nobuo Murofushi ,  Masakazu Kato

发明人： Nobuo Murofushi ,  Masakazu Kato

IPC分类号： H04B1/713

CPC分类号： H04B1/7143 ,  H04B2001/71365 ,  H04B2001/7154

摘要： A hopping pattern setting section sets, as a frequency hopping pattern code, elements of a matrix in which all integers of “1” to “the number of frequencies to be used” appear only once and which is obtained by adding, as an offset, any one of integers of “0” to “(the number of frequencies to be used)−1” to each of elements of a matrix obtained by excluding integers larger than the number of frequencies to be used from a matrix in which all integers of “1” to “(prime number larger than the number of frequencies to be used)−1” appear only once. A frequency oscillation section converts the frequency hopping pattern code into the frequencies to be used to output unmodulated signals of the frequencies to a transmission section and a reception section.

摘要翻译： 跳频图案设置部分将跳频图形代码设置为“1”到“要使用的频率数”的矩阵的元素仅出现一次，并且通过将作为偏移量的相加， 通过排除大于从要使用的频率的数目的整数得到的矩阵的每个元素的“0”到“（要使用的频率的数量）-1”的整数中的任何一个，其中所有矩阵的所有整数 “1”到“（素数大于要使用的频率的数量）-1”只出现一次。 频率振荡部分将跳频图案代码转换成用于将频率的未调制信号输出到发送部分和接收部分的频率。