Linearphase digital antialiasing filter
Abstract
A simple driftfree linear phase antialiasing filter is described which can be readily implemented in both hardware and software. Since the filter has equally weighted coefficients, it is well suited to microprocessor applications, especially if the value of N (number of equally weighted samples) is chosen to be of the form 2 to the P power, where P is a positive integer. Using a threestage filter with R 0.1 (R cutoff frequency/sampling frequency), it is possible to achieve an attenuation greater than 50 dB at all aliasing frequencies using only 2 x 32 words of store.
 Publication:

Electronics Letters
 Pub Date:
 August 1979
 DOI:
 10.1049/el:19790388
 Bibcode:
 1979ElL....15..539W
 Keywords:

 Bandpass Filters;
 Digital Filters;
 Error Analysis;
 Frequency Response;
 Phase Shift;
 Data Sampling;
 Performance Prediction;
 Signal Distortion;
 Signal Processing;
 Wave Attenuation;
 Electronics and Electrical Engineering