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    • 12. 发明申请
    • Interrogator
    • 询问器
    • US20080175305A1
    • 2008-07-24
    • US12002487
    • 2007-12-17
    • Nobuo MurofushiMasakazu Kato
    • Nobuo MurofushiMasakazu Kato
    • H04B1/713
    • H04B1/7143H04B2001/71365H04B2001/7154
    • 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.
    • 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。
    • 19. 发明授权
    • Identification information reader and printer including the same
    • 识别信息阅读器和打印机包括相同
    • US08224262B2
    • 2012-07-17
    • US13044967
    • 2011-03-10
    • Sadatoshi OishiNobuo Murofushi
    • Sadatoshi OishiNobuo Murofushi
    • H04B1/38
    • H04B1/525
    • An identification information reader includes an antenna commonly used for transmission of a radio wave to a radio frequency identification tag and reception of a radio wave that has been modulated with at least identification information and transmitted from a radio frequency identification tag, a transmitter which outputs a radio wave to be transmitted from the antenna, a receiver which demodulates a radio wave received by the antenna to acquire at least the identification information, a directional coupler which is connected between the transmitter and the receiver, guides the radio wave output from the transmitter to the antenna and guides the radio wave received by the antenna to the receiver, and an attenuator which is connected between the antenna and the directional coupler and attenuates the radio wave guided to the receiver to reduce saturation of the receiver due to an increase in voltage standing wave ratio of the antenna.
    • 识别信息读取器包括:通常用于将无线电波发送到射频识别标签的天线和至少已经从标识信息被调制并且从射频识别标签发送的无线电波的接收;发射机,其输出 要从天线发送的无线电波,解调由天线接收的无线电波至少获得识别信息的接收机,连接在发射机和接收机之间的定向耦合器将从发射机输出的无线电波引导到 天线将天线接收到的无线电波引导到接收机,以及连接在天线和定向耦合器之间的衰减器,并且衰减引导到接收机的无线电波,以降低接收机的饱和,这是由于电压的站立增加 天线的波比。
    • 20. 发明授权
    • Quadrature demodulator and interrogator
    • 正交解调器和询问器
    • US08218688B2
    • 2012-07-10
    • US12215209
    • 2008-06-25
    • Nobuo MurofushiSadatoshi Oishi
    • Nobuo MurofushiSadatoshi Oishi
    • H04L27/00
    • H03D3/008H04B1/525
    • A quadrature demodulator generates an I-signal from a modulated reception signal and a local signal, generates a Q-signal from the local signal and the local signal having a phase shifted through 90 degrees. Capacitors remove DC components from the I- and Q-signals. Low-pass filters remove frequency components higher than the frequencies of the I- and Q-signals. An I-signal squaring section squares the I-signal having passed through the low-pass filters. A Q-signal squaring section squares the Q-signal having passed through the low-pass filters. An adding section adds the squared I-signal and the squared Q-signal together. A comparator then compares the level of an S1 signal resulting from the addition with a threshold to obtain an S2 signal. A data generating section of a digital signal processing section executes a process of inverting the signal level of the S2 signal at every rising edge of the S2 signal to demodulate reception data.
    • 正交解调器从调制的接收信号和本地信号产生I信号,从本地信号产生Q信号,并且具有相移90度的本地信号。 电容从I和Q信号中去除直流分量。 低通滤波器去除高于I和Q信号频率的频率分量。 I信号平方部对通过低通滤波器的I信号进行平方。 Q信号平方部对通过低通滤波器的Q信号进行平方。 加法部分将平方的I信号和平方Q信号相加在一起。 比较器然后将从加法产生的S1信号的电平与阈值进行比较以获得S2信号。 数字信号处理部分的数据产生部分执行在S2信号的每个上升沿使S2信号的信号电平反相的处理,以解调接收数据。