This paper deals with various types of digital signal processing and their uses. With the advent of digital computers, signal processing had made rapid advances .The phenomenal growth of digital signal processing (DSP) has been attributed to the availability of digital signal processor in late seventies or early eighties.
This has opened up possibility of replacing analog filters, correlators , spectrum analyzers by versatile but inexpensive DSP based equipment .The theory of DSP has been a step ahead of hardware developments. We have new signal processing algorithms
For example singular value decomposition (SVD) based algorithms waiting for faster but inexpensive digital signal processor for their exploitation . Digital signal processor
Technology has finally blossomed .Powerful methods of signal processing are used to detect and analyse signals, make transform of different kinds and observe changes in real time with the help of these DSP device based circuitry.
The digital signal processing deals with three main features
They are discrete signals and systems, digital filtering , spectrum analysis . Discrete signal and system is about signal analysis and modeling of systems the study of discrete signals and systems is also interest in communication , control system, circuit theory. A discrete signal is often derived by sampling continuous signal and digital signal is derived by quantizing the discrete signal thus sampling rate and quantization step size are of immediate concern
The digital filter like analog filter are primarily used to enhance the signal in presence of noise. The digital filters are used for interpolation, extrapolation, equalization detection.
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