Abstract
In this chapter, Multirate Digital Signal Processing, the basic principles of multirate digital signal processing are presented. In certain applications, changing the sampling rate to suit the task turns out to be advantageous. In addition to adder, multiplier and delay units, two new components, the downsampler and upsampler, are required in multirate signal processing. Downsampling is discarding a set of samples of a signal to reduce the sampling rate. Upsampling increases the sampling rate of a signal by interpolation. Appropriate filtering of the downsampled or upsampled signal results, respectively, in decimated or interpolated signal. The upsampling and downsampling can be implemented by polyphase filters more efficiently. Some of the applications of multirate systems are sampling rate converters, narrowband filter design, and the digital wavelet transform. All the basic operations and the applications are presented by suitable examples.
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Sundararajan, D. (2021). Multirate Digital Signal Processing. In: Digital Signal Processing. Springer, Cham. https://doi.org/10.1007/978-3-030-62368-5_8
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DOI: https://doi.org/10.1007/978-3-030-62368-5_8
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Publisher Name: Springer, Cham
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Online ISBN: 978-3-030-62368-5
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