# Understanding Digital Signal Processing

Understanding digital signal processing (DSP) can both be intriguing and frightening in the beginning. The mathematics involved in various integral transforms can turn off many teachers. The mysterious domain transformations can fascinate many a novice. For a long time as a graduate student I was amazed by the underlying idea behind transformation of a digital signal from time domain to frequency domain. I simply could not understand how it happened. After going through many lectures and books, I eventually came across Understanding Digital Signal Processing by Richard G Lyons.
Understanding Digital Signal Processing (DSP) treats the subject in a way no other author or teacher has ever done. The best thing about the book is that elucidates the various and many key concepts of DSP in an extremely layperson friendly manner.  It is quite inspiring to learn with the help of examples on as to what the various transforms and transfer functions do with a digital signal. One has a great eureka moment when one learns that the Fourier transform is basically a cross-correlation function. In order to know the strength of a particular frequency component in a multi-spectral signal, the signal is simply corss-correlated with another signal of that particular frequency. This is a very enlightening way to learn about the Fourier transform.
There are many other cherish-able ideas in the book. For instance, to know that a FIR filter is basically a smoothing function. Similarly, the rationale behind choosing a particular Nyquist’s sampling rate is also quite informative. The reasons for having bell-shaped windowing functions and their linkage with spectral leakage is also explained in a very nice manner. Other topics like the Z-transform, or IIR filtering are also covered in a very nice way.
Understanding digital signal processing can is the best book for anyone who wants to learn DSP from the ground up. It is also quite suitable for anyone who is an expert but wants a revision of concepts. It is specially useful for learning the key concepts of DSP and for developing a transparency in the mind about what actually happens to the signal when it is transformed from one domain to another. Any person who wants to learn DSP should definitely read Understanding Digial Signal Processing by Richard G Lyons. Understanding digital signal processing (DSP) can both be intriguing and frightening in the beginning. The mathematics involved in various integral transforms can turn off many teachers. The mysterious domain transformations can fascinate many a novice. For a long time as a graduate student I was amazed by the underlying idea behind transformation of a digital signal from time domain to frequency domain. I simply could not understand how it happened. After going through many lectures and books, I eventually came across Understanding Digital Signal Processing by Richard G Lyons.
Understanding Digital Signal Processing (DSP) treats the subject in a way no other author or teacher has ever done. The best thing about the book is that elucidates the various and many key concepts of DSP in an extremely layperson friendly manner.  It is quite inspiring to learn with the help of examples on as to what the various transforms and transfer functions do with a digital signal. One has a great eureka moment when one learns that the Fourier transform is basically a cross-correlation function. In order to know the strength of a particular frequency component in a multi-spectral signal, the signal is simply corss-correlated with another signal of that particular frequency. This is a very enlightening way to learn about the Fourier transform.
There are many other cherish-able ideas in the book. For instance, to know that a FIR filter is basically a smoothing function. Similarly, the rationale behind choosing a particular Nyquist’s sampling rate is also quite informative. The reasons for having bell-shaped windowing functions and their linkage with spectral leakage is also explained in a very nice manner. Other topics like the Z-transform, or IIR filtering are also covered in a very nice way.
Understanding digital signal processing can is the best book for anyone who wants to learn DSP from the ground up. It is also quite suitable for anyone who is an expert but wants a revision of concepts. It is specially useful for learning the key concepts of DSP and for developing a transparency in the mind about what actually happens to the signal when it is transformed from one domain to another. Any person who wants to learn DSP should definitely read Understanding Digial Signal Processing by Richard G Lyons. The book is particularly suitable for the mathematics shy.

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