PROCEEDINGS OF THE IEEE, VOL. 69, NO. 3, Interpolation and.

Decimation consists of the processes of lowpass filtering, followed by downsampling. To implement the filtering part, you can use either FIR or IIR filters. To implement the downsampling part (by a downsampling factor of “M”) simply keep every Mth sample, and throw away the M-1 samples in between.

In digital signal processing, downsampling, compression, and decimation are terms associated with the process of resampling in a multi-rate digital signal processing system. Both downsampling and decimation can be synonymous with compression, or they can describe an entire process of bandwidth reduction (filtering) and sample-rate reduction.

This chapter investigates basics of multirate digital signal processing, illustrates how to change a sampling rate for speech and audio signals, and describes the polyphase implementation for the decimation filter and interpolation filter. Next, the chapter introduces the advanced analog-to-digital conversion system with the oversampling technique and sigma-delta modulation. Finally, the.

Overview of Multirate Filters A filter that reduces the input rate is called a decimator. A filter that increases the input rate is called an interpolator. To visualize this process, examine the following figure, which illustrates the processes of interpolation and decimation in the time domain.

Multirate Digital Signal Processing, Oversampling of Analog-to-Digital Conversion, and Undersampling of Bandpass Signals. Li Tan, Jean Jiang, in Digital Signal Processing (Second Edition), 2013. 12.3.2 Sigma-Delta Modulation Analog-to-Digital Conversion. To further improve ADC resolution, sigma-delta modulation (SDM) ADC is used. The principles of the first-order SDM are described in Figure 12.

Multirate DSP The following text describes why I ask the strange question in the title of this blog. Some months ago I was asked to review a article manuscript, for possible publication in a signal processing journal, that presented a method for improving the performance of cascaded integrator-comb (CIC) decimation filters (1).

The CIC Decimation block performs a sample rate decrease (decimation) on an input signal by an integer factor. Cascaded Integrator-Comb (CIC) filters are a class of linear phase FIR filters comprised of a comb part and an integrator part. The block supports real and complex fixed-point inputs.

The most obvious application of such a filter is when the input sample rate and output sample rate need to differ (decimation or interpolation) — however, multirate filters are also often used in designs where this is not the case. For example you may have a system where the input sample rate and output sample rate are the same, but internally there is decimation and interpolation occurring.

Multirate filters are filters in which different parts of the filter operate at different rates. Such filters are commonly used when the input and output sample rates differ, such as during decimation, interpolation, or a combination of both. However, multirate filters are often used in designs where the input sample rate and output sample rate are the same. In such filters, there is an.

Multirate Filter Properties Compatibility. mfilt objects will be removed in a future release. Refer to the reference page for a specific mfilt object to see its recommended replacement. Property Summaries. The following table summarizes the multirate filter properties and provides a brief description of each.

This book offers readers a single-source reference to the implementation aspects of multirate systems, advances in design of comb decimation filters and multirate filter banks. The authors describe a variety of the most recent applications in fields such as, image and video processing, digital communications, software and cognitive radio.

Multirate filters can bring efficiency to a particular filter implementation. In general, multirate filters are filters in which different parts of the filter operate at different rates. The most obvious application of such a filter is when the input sample rate and output sample rate need to differ (decimation or interpolation) — however, multirate filters are also often used in designs.