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    • 31. 发明授权
    • UWB demodulating apparatus
    • UWB解调装置
    • US07366235B2
    • 2008-04-29
    • US10855691
    • 2004-05-27
    • Masahiro MimuraKazuaki TakahashiSuguru Fujita
    • Masahiro MimuraKazuaki TakahashiSuguru Fujita
    • H03K9/04
    • H04B1/71637H04B1/7183H04L25/4902
    • A demodulated signal is to be generated by use of a first detection signal detected a presence/absence of a signal according to a correlation between a reception signal PPM-modulated at a pulse interval of T and a pulse variation width of τ and the reception signal delayed with a time (T+τ), a second detection signal detected a presence/absence of a signal according to a correlation between the reception signal and the reception signal delayed with a time (T), and a third detection signal detected a presence/absence of a signal according to a correlation between the reception signal and the reception signal delayed with a time (T−τ). By thus combining a plurality of delayed detections, it is possible to obtain a UWB demodulating apparatus configured with a circuit suited for integrated circuit fabrication.
    • 通过使用根据以T的脉冲间隔调制的接收信号PPM和τ的脉冲变化宽度与接收信号之间的相关性的检测信号的存在/不存在的第一检测信号来产生解调信号 延迟时间(T +τ),第二检测信号根据接收信号与以时间(T)延迟的接收信号之间的相关性检测信号的存在/不存在,并且第三检测信号检测到存在 /根据接收信号与以时间(T-τ)延迟的接收信号之间的相关性,不存在信号。 通过组合多个延迟的检测,可以获得配置有适于集成电路制造的电路的UWB解调装置。
    • 32. 发明申请
    • IMPULSE WAVEFORM GENERATING APPARATUS
    • IMPULSE WAVEFORM生成装置
    • US20070087715A1
    • 2007-04-19
    • US11566412
    • 2006-12-04
    • Masahiro MimuraSuguru FujitaKazuaki Takahashi
    • Masahiro MimuraSuguru FujitaKazuaki Takahashi
    • H04B1/40H04B1/06
    • H04B1/7174H04B1/7172
    • An impulse waveform generating apparatus comprises an oscillator for generating a reference signal having a center frequency in a frequency band of an impulse to generate, a timing matching circuit for shifting a phase of the reference signal by 90 degrees, a frequency demultiplier for dividing a frequency of the phase shift signal and obtaining a timing signal having a frequency component having a frequency width of an impulse to generate, a memory storing a waveform shape table, a waveform forming section for forming a waveform in synchronism with the timing signal, according to information of a shape table having a predetermined waveform, a low-pass filter for obtaining an envelope signal from an output signal of the waveform forming section, and a waveform generating section for changing an amplitude of the reference signal according to a value of the envelope signal.
    • 脉冲波形生成装置包括:振荡器,用于产生具有脉冲频带的中心频率的基准信号,生成用于使参考信号的相位偏移90度的定时匹配电路,用于分频频率的分频器 并获得具有产生脉冲频率的频率分量的定时信号,存储波形形状表的存储器,与定时信号同步地形成波形的波形形成部,根据信息 具有预定波形的形状表,用于从波形形成部分的输出信号获得包络信号的低通滤波器和用于根据包络信号的值改变参考信号的幅度的波形产生部分 。
    • 33. 发明授权
    • Impulse waveform generating apparatus
    • 脉冲波形发生装置
    • US07164900B2
    • 2007-01-16
    • US10841595
    • 2004-05-07
    • Masahiro MimuraSuguru FujitaKazuaki Takahashi
    • Masahiro MimuraSuguru FujitaKazuaki Takahashi
    • H04B1/26
    • H04B1/7174H04B1/7172
    • An impulse waveform generating apparatus comprises an oscillator for generating a reference signal having a center frequency in a frequency band of an impulse to generate, a timing matching circuit for shifting a phase of the reference signal by 90 degrees, a frequency demuultiplier for dividing a frequency of the phase shift signal and obtaining a timing signal having a frequency component having a frequency width of an impulse to generate, a memory storing a waveform shape table, a waveform forming section for forming a waveform in synchronism with the timing signal, according to information of a shape table having a predetermined waveform, a low-pass filter for obtaining an envelope signal from an output signal of the waveform forming section, and a waveform generating section for changing an amplitude of the reference signal according to a value of the envelope signal.
    • 脉冲波形生成装置包括:振荡器,用于产生具有脉冲频带中心频率的参考信号,产生用于将参考信号的相位偏移90度的定时匹配电路,用于分频频率的频率分配器 并获得具有产生脉冲频率的频率分量的定时信号,存储波形形状表的存储器,与定时信号同步地形成波形的波形形成部,根据信息 具有预定波形的形状表,用于从波形形成部分的输出信号获得包络信号的低通滤波器和用于根据包络信号的值改变参考信号的幅度的波形产生部分 。
    • 40. 发明授权
    • UWB transmission apparatus and UWB transmission method
    • UWB传输设备和UWB传输方式
    • US08259850B2
    • 2012-09-04
    • US12377113
    • 2007-10-10
    • Lei HuangPing LuoSuguru FujitaKazuaki Takahashi
    • Lei HuangPing LuoSuguru FujitaKazuaki Takahashi
    • H04L27/20
    • H04L27/0008H04B1/7176H04L27/02H04L27/18
    • A UWB transmission apparatus that, in a system using a mixture of amplitude and phase modulation schemes, can support both of the amplitude and phase modulation schemes, while preventing the signal powers of amplitude-modulated signals from degrading. In this UWB transmission apparatus, if the modulation mode is of QPSK, a mapping part (121) selects one of four signal points on the IQ plane in accordance with a 2-bit data, and outputs information related to the I- and Q-components of the selected signal point to a QPSK/ASK modulated signal forming part (122). If the modulation mode is of ASK, the mapping part (121) selects the origin point on the IQ plane when the data being ‘0’ and selects one of four signal points on the IQ plane, similarly to the case of QPSK modulation, when the data being ‘1,’ and outputs information, which is related to the selected signal point, to the QPSK/ASK modulated signal forming part (122).
    • 一种UWB传输装置,其在使用幅度和相位调制方案的混合的系统中可以支持幅度和相位调制方案两者,同时防止幅度调制信号的信号功率降级。 在该UWB发送装置中,如果调制模式为QPSK,则映射部(121)根据2比特数据选择IQ平面上的四个信号点中的一个,并且输出与I和Q- 所选信号的分量指向QPSK / ASK调制信号形成部分(122)。 如果调制方式为ASK,映射部分(121)在数据为“0”时选择IQ平面上的原点,并选择IQ平面上的四个信号点中的一个,类似于QPSK调制的情况,当 数据为“1”,并将与所选信号点相关的信息输出到QPSK / ASK调制信号形成部分(122)。