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    • 2. 发明授权
    • Spectrum diffusion signal analyzer and method of analyzing diffusion signal
    • 频谱扩散信号分析仪及扩散信号分析方法
    • US06552995B1
    • 2003-04-22
    • US09252218
    • 1999-02-18
    • Juichi Nakada
    • Juichi Nakada
    • H04J1100
    • H04B1/7085G01R23/16H03D3/007
    • According to the present invention, the inputted spectrum diffusion signal is orthogonal-transformed (16), and then, the common mode output Zre and the orthogonal mode output Zim are respectively AD-transformed (23, 24). Zre and Zim are respectively inputted to series connections of delay units respectively having a sampling period, and the corresponding delayed outputs are complex-multiplied (20i). Each output is N-points-complex-Fast-Fourier-transformed, and the absolute value of the each coefficient is squared. The squared absolute value is two-dimensionally displayed by setting a horizontal axis as a frequency axis and a longitudinal axis as a time axis (32). Then, a carrier wave frequency error is obtained from the maximum peak of the frequency, and a timing phase is obtained from the time.
    • 根据本发明,输入的频谱扩散信号被正交变换(16),然后,共模输出Zre和正交模式输出Zim分别被AD变换(23,24)。 Zre和Zim分别输入到具有采样周期的延迟单元的串联连接,并且对应的延迟输出被复乘(20i)。 每个输出是N点复合 - 快速傅里叶变换,每个系数的绝对值平方。 通过将水平轴设定为频率轴,将纵轴设定为时间轴(32)来二维地显示平方的绝对值。 然后,从频率的最大峰值获得载波频率误差,并从时间获得定时相位。
    • 3. 发明授权
    • Method and apparatus for measuring waveform quality of CDMA signal
    • 测量CDMA信号波形质量的方法和装置
    • US6104983A
    • 2000-08-15
    • US986644
    • 1997-12-08
    • Juichi Nakada
    • Juichi Nakada
    • G01R29/08H04B1/707H04J13/00H04B3/46
    • H04B1/707H04B17/16
    • The present invention offers a method and apparatus for measuring the waveform quality of a CDMA signal with increased accuracy. A baseband digital measuring signal Z(k) from a quadrature transform/complementary filter 22 is applied to a demodulating part 25, wherein it is demodulated by a PN code of a pilot signal to detect a bit train and an amplitude a'.sub.i. An ideal signal R.sub.i is generated from the bit train, the amplitude a'.sub.i and the PN code. At the same time, auxiliary data A, B, C, H and I, which are used to solve approximate simultaneous equations for computing parameters that minimize the square of the difference between the ideal signal R.sub.i and the measuring signal Z(k), are generated in an ideal signal/auxiliary data generating part 26. The thus obtained auxiliary data and the measuring signal Z(k) are used to solve the simultaneous equations to estimate the parameters in a parameter estimating part 27. The parameters are optimized by repeatedly correcting the measuring signal Z(k), the ideal signal R.sub.i and the auxiliary data A, B, C, H, I based on-the estimated parameters and estimating the parameters based on the corrected data. When the parameters are optimized, the power coefficient .rho..sub.i is computed using the optimized measuring signal Z(k) and the PN code.
    • 本发明提供了一种以更高精度测量CDMA信号的波形质量的方法和装置。 来自正交变换/补偿滤波器22的基带数字测量信号Z(k)被施加到解调部分25,其中它被导频信号的PN码解调,以检测比特串和幅度a'i。 从比特串生成理想信号Ri,振幅a'i和PN码。 同时,用于求解理想信号Ri和测量信号Z(k)之间差的平方的计算参数的近似联立方程的辅助数据A,B,C,H和I是 在理想的信号/辅助数据产生部分26中产生。由此获得的辅助数据和测量信号Z(k)用于求解联立方程以估计参数估计部分27中的参数。通过重复校正来优化参数 测量信号Z(k),理想信号Ri和辅助数据A,B,C,H,I,基于估计的参数,并且基于校正数据估计参数。 当优化参数时,使用优化的测量信号Z(k)和PN码来计算功率系数rho i。
    • 4. 发明授权
    • Device, method, and program for measuring signal, and recording medium
    • 用于测量信号的装置,方法和程序以及记录介质
    • US08185328B2
    • 2012-05-22
    • US12279433
    • 2007-02-15
    • Juichi Nakada
    • Juichi Nakada
    • G01R15/00G01R21/06G01R29/26G01R25/00H03K9/00H04L27/00H04L27/06
    • G01R23/16H04B7/0617H04B17/10H04B17/327H04L1/24H04L27/2647H04L27/2657H04L27/2689
    • Differences in outputs from multiple terminals are easily measured. There is provided a signal measuring device for receiving signals to be measured which are generated by modulating frequency-different signals different in frequency from each other, and are respectively output from different output terminals, including a combiner which combines the signals to be measured output from the output terminals, a quadrature demodulation unit which demodulates a result of the combining carried out by the combiner, an FFT unit which represents a result of the demodulation in the frequency domain, and a characteristic measuring unit, where the characteristic measuring unit measures data for respective frequencies of the result of the demodulation, acquires output-terminal-corresponding data, which correspond to the respective output terminals, based on the data, derives characteristics of the respective output terminals based on the output-terminal-corresponding data, and acquires a difference in the characteristics between the output terminals based on the derived result.
    • 多个终端的输出差异很容易测量。 提供了一种信号测量装置,用于接收通过调制频率不同的频率不同的信号而产生的待测信号,分别从不同的输出端子输出,包括组合器,该组合器将要测量的信号输出 输出端子,解调由组合器执行的组合的结果的正交解调单元,表示频域中的解调结果的FFT单元和特性测量单元,其中特征测量单元测量数据 解调结果的各个频率基于该数据获取与各个输出终端对应的输出终端对应的数据,根据输出终端对应的数据导出各个输出终端的特性,并取得 基于输出端子的输出端子之间的特性差异 生活结果。
    • 5. 发明申请
    • DEVICE, METHOD, AND PROGRAM FOR MEASURING SIGNAL, AND RECORDING MEDIUM
    • 用于测量信号的设备,方法和程序以及记录介质
    • US20090055109A1
    • 2009-02-26
    • US12279433
    • 2007-02-15
    • Juichi Nakada
    • Juichi Nakada
    • G01R19/00G01R15/00
    • G01R23/16H04B7/0617H04B17/10H04B17/327H04L1/24H04L27/2647H04L27/2657H04L27/2689
    • Differences in outputs from multiple terminals are easily measured. There is provided a signal measuring device for receiving signals to be measured which are generated by modulating frequency-different signals different in frequency from each other, and are respectively output from different output terminals, including a combiner which combines the signals to be measured output from the output terminals, a quadrature demodulation unit which demodulates a result of the combining carried out by the combiner, an FFT unit which represents a result of the demodulation in the frequency domain, and a characteristic measuring unit, where the characteristic measuring unit measures data for respective frequencies of the result of the demodulation, acquires output-terminal-corresponding data, which correspond to the respective output terminals, based on the data, derives characteristics of the respective output terminals based on the output-terminal-corresponding data, and acquires a difference in the characteristics between the output terminals based on the derived result.
    • 多个终端的输出差异很容易测量。 提供了一种信号测量装置,用于接收通过调制频率不同的频率不同的信号而产生的待测信号,分别从不同的输出端子输出,包括组合器,该组合器将要测量的信号输出 输出端子,解调由组合器执行的组合的结果的正交解调单元,表示频域中的解调结果的FFT单元和特性测量单元,其中特征测量单元测量数据 解调结果的各个频率基于该数据获取与各个输出终端对应的输出终端对应的数据,根据输出终端对应的数据导出各个输出终端的特性,并取得 基于输出端子的输出端子之间的特性差异 生活结果。
    • 9. 发明授权
    • Phase measurement device, method, program, and recording medium
    • 相位测量装置,方法,程序和记录介质
    • US07323883B2
    • 2008-01-29
    • US10557596
    • 2004-05-19
    • Juichi Nakada
    • Juichi Nakada
    • G01R23/20G01R23/16
    • G01R23/20G01R27/28
    • When a signal having two or more frequency components is fed to a circuit to be measured, a phase of the signal output from the circuit to be measured is measured. A phase measurement device measures an output when an input signal having two input frequency components ω10 and ω20 is fed to an amplifier (circuit to be measured). The phase measurement device includes an orthogonal converter that subjects the output of the amplifier to an orthogonal conversion using an average frequency ω0, which is an average of ω10 and ω20. A phase acquisitioner acquires phases θ1 and θ2 of the input frequency components in the output of the orthogonal converter and a phase θ3 of a distortion component. A match time/phase measurer measures a match time Δt during which phase θ1 is matched with phase θ2, and measures phase θ1 (Δt) during that time. A distortion component phase measurer measures phase θ3 (Δt) of the distortion component in the match time Δt. A display then displays θ1 (Δt) and θ3 (Δt).
    • 当将具有两个或更多个频率分量的信号馈送到要测量的电路时,测量从待测电路输出的信号的相位。 当具有两个输入频率分量ω10和ω20的输入信号馈送到放大器(待测电路)时,相位测量装置测量输出。 相位测量装置包括正交转换器,其使用平均频率ω0来对放大器的输出进行正交转换,平均频率ω0是ω10和ω20的平均值。 相位采集器获取正交变换器的输出中的输入频率分量的相位θ1和θ2以及失真分量的相位θ3。 匹配时间/相位测量器测量匹配时间Deltat,在该时间期间,θ1与相位θ2匹配,并且在该时间期间测量相位θ1(Deltat)。 失真分量相位测量器测量匹配时间Deltat中失真分量的相位θ3(Deltat)。 然后,显示器显示theta 1(Deltat)和theta 3(Deltat)。
    • 10. 发明申请
    • Phase measurement device, method, program, and recording medium
    • 相位测量装置,方法,程序和记录介质
    • US20070069766A1
    • 2007-03-29
    • US10557596
    • 2004-05-19
    • Juichi Nakada
    • Juichi Nakada
    • G01R29/00
    • G01R23/20G01R27/28
    • When a signal having two or more frequency components is fed to a circuit to be measured, a phase of the signal output from the circuit to be measured is measured. A phase measurement device measures an output when an input signal having two input frequency components ω10 and ω20 is fed to an amplifier (circuit to be measured). The phase measurement device includes an orthogonal converter that subjects the output of the amplifier to an orthogonal conversion using an average frequency ω0, which is an average of ω10 and ω20. A phase acquisitioner acquires phases θ1 and θ2 of the input frequency components in the output of the orthogonal converter and a phase θ3 of a distortion component. A match time/phase measurer measures a match time Δt during which phase θ1 is matched with phase θ2, and measures phase θ1 (Δt) during that time. A distortion component phase measurer measures phase θ3 (Δt) of the distortion component in the match time Δt. A display then displays θ1 (Δt) and θ3 (Δt).
    • 当将具有两个或更多个频率分量的信号馈送到要测量的电路时,测量从待测电路输出的信号的相位。 当具有两个输入频率分量ω10和ω20的输入信号馈送到放大器(待测电路)时,相位测量装置测量输出。 相位测量装置包括正交转换器,其使用平均频率ω0来对放大器的输出进行正交转换,平均频率ω0是ω10和ω20的平均值。 相位采集器获取正交变换器的输出中的输入频率分量的相位θ1和θ2以及失真分量的相位θ3。 匹配时间/相位测量器测量匹配时间Deltat,在该时间期间,θ1与相位θ2匹配,并且在该时间期间测量相位θ1(Deltat)。 失真分量相位测量器测量匹配时间Deltat中失真分量的相位θ3(Deltat)。 然后,显示器显示theta 1(Deltat)和theta 3(Deltat)。