A digital GPS PN code acquisition circuit based on direct IF sampling is presented.

文中提出了基于直接中频采样的数字化GPS接收机码捕获电路。

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As a key technology in digital quadrature demodulation system, the direct IF sampling filter with sharp cutting-off transition band can improve the performance of demodulation system.

中频采样是数字正交鉴相系统中的一项关键技术，具有锐截止特性的中频采样滤波器可以改善鉴相系统的性能。

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If sampling length doesn't adapt rotative velocity, the results of calculation by FFT or periodogram analysis will lead to pseudo-periods, which distorts the principal value function terms.

若采样长度与回转速度不吻合，将会出现伪周期，使主值函数项中提取周期成分后的信号失实。

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To use a different example from copyright, where would modern music be if sampling was illegal?

FORBES: Perhaps We Should Abolish Or Abandon Tech Patents? Perhaps Abolish Sorry Apple

If no sampling were used, the likely undercount would be around 1.9%.

ECONOMIST: Statistics

If it used these sampling methods, the Census Bureau says, there is a 90% chance that its estimate of America's population would be within 0.1% of the true number.

ECONOMIST: Statistics