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    • 1. 发明申请
    • METHOD AND SYSTEM FOR SPECTRAL LEAKAGE REMOVAL IN DAC TESTING
    • DAC测试中的频谱泄漏检测方法与系统
    • US20150323640A1
    • 2015-11-12
    • US14482861
    • 2014-09-10
    • Advantest (Singapore) Pte. Ltd.
    • Ming Lu
    • G01R35/00G01R31/28
    • H03M1/1085G01R35/005H03M1/66
    • System and method for processing a signal sampled from an output of a digital-analog converter. The method comprises: (a) transforming the input signal from time domain to frequency domain to obtain a signal having a plurality of bins; (b) estimating properties of a largest amplitude bin, except for direct current (DC) bin, in the input signal; (c) performing signal reconstruction in time domain based on the estimated properties to generate a reconstructed signal; (d) subtracting the estimated signal from the input signal to get a residual signal; (e) repeating steps (a)-(d) till a predetermined number of bins have been processed; (f) adding all the reconstructed signals and the last residual signal together to generate a sum signal; and (g) transforming the sum signal from the time domain to the frequency domain.
    • 用于处理从数模转换器的输出采样的信号的系统和方法。 该方法包括:(a)将输入信号从时域变换到频域,以获得具有多个信道的信号; (b)估计输入信号中除了直流(DC)箱之外的最大振幅箱的特性; (c)基于所估计的属性在时域中执行信号重构以产生重构信号; (d)从输入信号中减去估计信号以获得残留信号; (e)重复步骤(a) - (d)直至处理了预定数量的料仓; (f)将所有重建信号和最后的残差信号加在一起以产生和信号; 和(g)将和信号从时域变换到频域。