Quadrature sampling technique is widely used in the field of signal processing since it can reserve all information about the complex envelope of IF signal.
正交采样技术可以保留信号复包络的幅度、相位等信息，因此在信号处理领域中有着广泛的应用。
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We have investigated the localization of the two atoms passing through a standing wave in an optical cavity by measuring the fieldquadrature.