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    • 3. 发明授权
    • High-speed waveform digitizer with a phase correcting means and a method therefor
    • 具有相位校正装置的高速波形数字转换器及其方法
    • US06384756B1
    • 2002-05-07
    • US09505955
    • 2000-02-17
    • Shinsuke TajiriKoji Asami
    • Shinsuke TajiriKoji Asami
    • H03M110
    • H03M1/0836
    • A digitizer for converting an analog signal output from a semiconductor device to a digital signal, includes: N Analog-to-Digital converters (ADC's) (31, 32), which sequentially convert the analog signal output from the semiconductor device to the digital signal, a phase error term being denoted &tgr;; an N-way time interleaving unit (40) which interleaves the digital signals from said ADC's in sequence and produces data sequence; and a Fourier Transformation (FT) processing unit (50) for performing FT processing on the data sequence output from said N-way time interleaving unit, the FT processing unit including a butterfly operation unit (220) which inserts a phase error correcting factor to a butterfly operation performed by said butterfly operation unit, so as to correct &tgr;.
    • 用于将从半导体器件输出的模拟信号转换为数字信号的数字转换器包括:N个模数转换器(ADC)(31,32),其将从半导体器件输出的模拟信号依次转换为数字信号 相位误差项被表示为 N路时间交织单元(40),其顺序地交织来自所述ADC的数字信号并产生数据序列; 以及用于对从所述N路时间交错单元输出的数据序列执行FT处理的傅里叶变换(FT)处理单元,所述FT处理单元包括蝶形运算单元,所述蝶形运算单元将相位误差校正因子插入到 由蝶形运算单元执行的蝶形运算,以便校正。
    • 4. 发明授权
    • Method and apparatus for estimating PSK modulated signals
    • 用于估计PSK调制信号的方法和装置
    • US5838737A
    • 1998-11-17
    • US663847
    • 1996-06-14
    • Takahioro YamaguchiShinsuke Tajiri
    • Takahioro YamaguchiShinsuke Tajiri
    • G01R25/00G01R29/06H04L1/20H04L27/00H04L27/233H03D3/22H04L27/22
    • H04L27/2332H04L1/206G01R25/00G01R29/06H04L2027/0028H04L2027/0057
    • An in-phase component and a quadrature component of a digitized input DQPSK modulated signal are provided from interpolation filters, respectively. An instantaneous amplitude and an instantaneous phase of the input signal for each symbol clock are detected from the in-phase and quadrature components and are fed to adders. At the same time, that one of symbols "0, 0," "0, 1," "1, 0" and "1, 1" which corresponds to the instantaneous phase is detected by a symbol detector. An ideal reference signal generating part generates an ideal amplitude component and an ideal phase component corresponding to the detected symbol and provides them to a parameter calculating part. In an I-Q origin offset detecting part, an I-Q origin offset is calculated on the basis of the relationship between a triangle formed by the current detected vector corresponding to an ideal symbol and a vector detected one symbol clock before and a triangle formed by the said two vectors. An amplitude and a phase corresponding to the calculated I-Q origin offset are provided to the adders, respectively, and are corrected with respect to the detected instantaneous amplitude and phase, thereafter being fed to the parameter calculating part. In the parameter calculating part, a transmitter gain, and an amplitude variation, offset frequency and phase error per symbol clock are calculated.
    • 分别从内插滤波器提供数字化输入DQPSK调制信号的同相分量和正交分量。 从同相和正交分量检测每个符号时钟的输入信号的瞬时振幅和瞬时相位,并将其馈送到加法器。 同时,由符号检测器检测与瞬时相位对应的符号“0,0”,“0”,“1”,“1”,“1”。 一个理想的参考信号产生部分产生理想的振幅分量和对应于所检测的符号的理想的相位分量,并将它们提供给参数计算部分。 在IQ原点偏移检测部分中,基于由与理想符号相对应的当前检测矢量形成的三角形和之前检测到的一个符号时钟的矢量与由所述两个形状的三角形形成的三角形之间的关系来计算IQ原点偏移 向量 相应于计算出的I-Q原点偏移的幅度和相位分别被提供给加法器,并相对于检测到的瞬时幅度和相位被校正,之后被馈送到参数计算部分。 在参数计算部分中,计算出每个符号时钟的发射机增益,振幅变化,偏移频率和相位误差。
    • 5. 发明授权
    • Method and apparatus for estimating PSK modulated signals
    • 用于估计PSK调制信号的方法和装置
    • US5590158A
    • 1996-12-31
    • US538943
    • 1995-10-11
    • Takahioro YamaguchiShinsuke TajiriJuichi Nakada
    • Takahioro YamaguchiShinsuke TajiriJuichi Nakada
    • G01R25/00G01R29/06H04L1/20H04L27/00H04L27/233H03D3/22H04L27/22
    • H04L27/2332H04L1/206G01R25/00G01R29/06H04L2027/0028H04L2027/0057
    • An in-phase component and a quadrature component of a digitized input DQPSK modulated signal are provided from interpolation filters, respectively. An instantaneous amplitude and an instantaneous phase of the input signal for each symbol clock are detected from the in-phase and quadrature components and are fed to adders. At the same time, that one of symbols "0, 0," "0, 1," "1, 0" and "1, 1" which corresponds to the instantaneous phase is detected by a symbol detector. An ideal reference signal generating part generates an ideal amplitude component and an ideal phase component corresponding to the detected symbol and provides them to a parameter calculating part. In an I-Q origin offset detecting part, an I-Q origin offset is calculated on the basis of the relationship between a triangle formed by the current detected vector corresponding to an ideal symbol and a vector detected one symbol clock before and a triangle formed by the said two vectors. An amplitude and a phase corresponding to the calculated I-Q origin offset are provided to the adders, respectively, and are corrected with respect to the detected instantaneous amplitude and phase, thereafter being fed to the parameter calculating part 22. In the parameter calculating part, a transmitter gain, and an amplitude variation, offset frequency and phase error per symbol clock are calculated.
    • 分别从内插滤波器提供数字化输入DQPSK调制信号的同相分量和正交分量。 从同相和正交分量检测每个符号时钟的输入信号的瞬时振幅和瞬时相位,并将其馈送到加法器。 同时,由符号检测器检测与瞬时相位对应的符号“0,0”,“0”,“1”,“1”,“1”。 一个理想的参考信号产生部分产生理想的振幅分量和对应于所检测的符号的理想的相位分量,并将它们提供给参数计算部分。 在IQ原点偏移检测部分中,基于由与理想符号相对应的当前检测矢量形成的三角形和之前检测到的一个符号时钟的矢量与由所述两个形状的三角形形成的三角形之间的关系来计算IQ原点偏移 向量 分别向加法器提供与计算出的IQ原点偏移相对应的幅度和相位,并相对于检测到的瞬时幅度和相位进行校正,然后送入参数计算部22.在参数计算部中,a 发射机增益,以及每个符号时钟的振幅变化,偏移频率和相位误差。