In this example the smallest overlap is Fs/6. We then select widths for guard bands that do not exceed Fs/6. Additional ADC clock rates and anti-aliasing filters may be used to operate in still higher Nyquist regions."/>
STAGGERED INTERLEAVED NYQUIST REGIONS AVOID GUARD BAND INDUCED HOLES WHEN SAMPLING A BAND LIMITED SIGNAL
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STAGGERED INTERLEAVED NYQUIST REGIONS AVOID GUARD BAND INDUCED HOLES WHEN SAMPLING A BAND LIMITED SIGNAL
STAGGERED INTERLEAVED NYQUIST REGIONS AVOID GUARD BAND INDUCED HOLES WHEN SAMPLING A BAND LIMITED SIGNAL
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机译：采样带状有限信号时，交错交错的奈奎斯特区域避免了防护带引起的孔洞
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摘要
Staggered interleaved Nyquist regions associated with differing ADC clock rates (FCLK) avoids spectrum lost through disjoint guard bands at the end of or between adjacent Nyquist regions. The staggered interleaved Nyquist regions overlap by an amount at least as much as is consumed by the guard bands. Selectable anti-aliasing filters associated with each Nyquist region and its ADC clock rate are used to enforce the staggered Nyquist regions and their various guard bands. For example, and neglecting guard bands, an initial raw band of operation RB1 may be the First Nyquist region for a basic sampling frequency Fs. An adjacent raw band of operation RB2 that overlaps RB1 may be the Second Nyquist region for an alternate sampling frequency 2Fs/3. An adjacent raw band of operation RB3 that overlaps RB2 may be the Second Nyquist region for the basic sampling frequency Fs. These raw bands interleave and overlap:;
RB1:DC to Fs/21st Nyq. for FCLK = FsRB2:(⅔)Fs − (½)(⅔Fs) = Fs/3 to2nd Nyq. for FCLK = 2Fs/32(2Fs/3)/2 = 2Fs/3RB3:Fs − (½)Fs = Fs/2 to 2(Fs/2) = Fs2nd Nyq. for FCLK = Fs
In this example the smallest overlap is Fs/6. We then select widths for guard bands that do not exceed Fs/6. Additional ADC clock rates and anti-aliasing filters may be used to operate in still higher Nyquist regions.
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机译：与不同ADC时钟速率（F CLK ）相关的交错交错的奈奎斯特区域可避免在相邻奈奎斯特区域的末端或之间通过不相交的保护带而丢失频谱。交错的交错的奈奎斯特区重叠的量至少等于保护带消耗的量。与每个奈奎斯特区域及其ADC时钟频率相关的可选抗混叠滤波器用于强制交错的奈奎斯特区域及其各种保护带。例如，忽略保护频带，对于基本采样频率F s ，操作RB 1 的初始原始频带可能是第一奈奎斯特区域。与RB 1 重叠的相邻操作RB 2 原始频带可以是第二奈奎斯特区域，用于交替采样频率2F s / 3。与RB 2 重叠的相邻操作RB 3 原始带可以是基本采样频率F s 的第二奈奎斯特区域。这些原始频带交错和重叠：
<标题/> <行> entry align =“ center” nameEnd =“ 3” nameStart =“ 1” rowSep =“ 1” /> <行> RB 1 ： DC到F s / 2 1 st Nyq。对于F CLK = F s <行> RB 2 ： （⅔）F s -（1/2）（⅔F s ）= F s / 3至 2 nd Nyq。对于F CLK = 2F s / 3 <行> 2（2F s / 3）/ 2 = 2F s / 3 <行> RB 3 ： F s -（1/2）F s = F s / 2至2（F s / 2）= F s 2 nd Nyq。对于F CLK = F s <行> entry align =“ center” nameEnd =“ 3” nameStart =“ 1” rowSep =“ 1” /> 在此示例中，最小重叠为F s / 6。然后，我们为保护带选择不超过F s / 6的宽度。可以使用其他ADC时钟速率和抗混叠滤波器来在更高的奈奎斯特区域中工作。
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