There can be few ,
1. Speed & the Cost
DSP Design cost can be very expensive when large bandwidth signals are involved . Even the ADC ( Analog to Digital Converter ) and DAC ( Digital to Analog Converter ) device prices are high for large BW scenarios .
Speed is another concern . Currently DSP devices are not faster enough to cater all the requirements in the world of signal processing . At the moment only up to moderate BW Signals can be processed . Bandwidths are in the 100MHz range are still being processed by analog methods since the DSP methods available are not faster enough .
2. Design Time
DSP Design time may be too long . And for DSP design, you should have a skilled, and perfect people who knows well about the DSP techniques . Also you should have the required toolset, specially the required software packages . Without these the DSP sometimes be impossible .
Unwanted Errors of precision when the analog signal is converted into a quantized, sampled digital signal. The same error arises when the digital signal is then converted into an analog signal for the plant to use.
advantages, disadvantages of digital control systems
The basic elements in digital signal processing are an analog to digital converter, digital signal processor, and digital to analog converter. This process can take an analog input signal, convert it to digital for processing and offer an analog output.
what are the characters of digital signal
digital signal
Digital Signal Processing
digital signal processor
An DAC convert digital signal to analog signal i.e Digital to Analog Converter. An ADC convert analog signal to digital signal i.e Analog to Digital Converter.
There are several devices called digital to analog converters for this purpose. 1s and 0s of the digital signal are used to represent the digital signal in analog form.
There are four possible combinations of encoding techniques -Digital data, digital signal -Digital data, analog signal -Analog data, digital signal -Analog data, analog signal
The signal sent to the TV must be a digital signal as well.
A digital signal is actually a complex signal. Consider the horizontal part of a digital signal as a component with 0 frequency and the vertical part of the signal as the component of infinite frequency. Also, consider the change from the horizontal to vertical as all the frequencies. Then we can claim that a digital signal is complex signal with frequencies from 0 to infinite.A digital signal is a composite analog signal with an infinite bandwidth.