Putting Undersampling to Work Aliasing To avoid aliasing, we know from the Nyquist criterion that we must digitize a signal at a sampling rate of at least twice the bandwidth of the signal. For 'baseband' signals with frequency components starting at DC and extending up to some maximum ...
Sampling rateNyquist frequencyWind analysisMissing wind dataIn wind measurement, the sampling rate is one of the most crucial factors in wind data acquisition to yield good accuracy for wind analysis and wind resource assessment. To avoid aliasing problems, wind speed and direction are measured at ...
The minimum sampling rate required to avoid aliasing, as we have seen, is twice the one-sided bandwidth of the modulated navigation signal. However, these signals typically carry different information in their I and Q phase components. Sometimes, these two signals in orthogonal phases, and carryin...
The sinc ringing frequency must be higher than twice that of the highest possible frequency we want to sample. Not meeting the requirements will cause distortions, called aliasing distortions. Let us examine sampling of a sine wave with frequency above half of the sampling rate. The red wave ...
6.It is calculated as half of the value of the sampling rate.Passing this level causes aliasing distortion, or foldover. 它的计算方法是将采样率除以二,超过这个数值将会导致折叠失真,或称折叠。 7.This paper presents a sampling and collecting high speed cloud echo data method using a monolithic...
sampled signal are called aliasing. In order to get rid of the aliasing effect, the ADC sampling rate must be greater than the highest frequency that needs to be preserved. An increase in the ADC sampling rate indicates that it is possible to record the higher frequencies without aliasing. ...
Conversely, one may sample below the Nyquist rate. For a baseband signal (one that has components from 0 to the band limit), this introduces aliasing, but for a passband signal (one that does not have low frequency components), there are no low frequency signals for the aliases of high ...
Before a continuous impulse response is sampled, a lowpass filter should be considered for eliminating all frequency components at half the sampling rate and above. In other words, the system itself should be ``lowpassed'' to avoid aliasing in many applications. (On the other hand, there are...
Of course, to avoid aliasing we can always sample at a faster rate. The second distortion mechanism occurs when the signal is undersampled, causing aliasing. The remedy is to sample at a faster rate. EXAMPLE 9.1 The frequency spectrum of a typical speech signal is shown in Fig. 9.7a. It...
The present Application for Patent claims priority to Provisional Application No. 61/186,308 entitled “Apparatus and Method for Dynamic Scaling of ADC Sampling Rate to Avoid Receiver Interference” filed Jun. 11, 2009, and assigned to the assignee hereof and hereby expressly incorporated by referenc...