All You Need To Know About Digital Signal Processing
Digital Signal Processing (DSP) is a method for making digital communications more reliable. In this method, the states of a digital signal are standardized and the effects of the interference produced by the electromagnetic waves emitted by other electronic devices are minimized.
The signals emitted by digital and analog communication devices are often distorted by electromagnetic noise. In order to improve the signal-to-noise ratio, the signal power of the waves being transmitted must be increased. This requires that the sensitivity of the receiver must also be increased.
Digital Signal Processing helps increase the sensitivity of radio wave receivers. It can lead to a significant improvement in the quality of the signals received and aid in the facilitation of long distance communication.
How Does It Work?
The input to the DSP system must always be digital in form. If the received signal is analog, it must first be changed into a digital signal with the help of an Analog-to-Digital Converter (ADC). The digital signal produced by an ADC has two or more standardized states that actually represent current or voltage levels.
The DSP circuit adjusts the levels of the digital signal so that the error produced by unwanted interference is kept to a minimum. When this is done, a Digital-to-Analog Converter (DAC) is used to change the digital signal back into analog form.
It is important to remember there that the ADC and DAC circuits are only required if the input signal in analog in form. For digital input signals, the DSP performs a direct correction of the errors produced by electromagnetic interference.
What Are The Main Components Of A DSP System?
The following are the three major components of any modern DSP system:
Central processor: The processor is responsible for performing the mathematical calculations that are necessary for successfully correcting the digital input signal.
Memory unit: This component stores the data that needs to be processed by the DSP and the instructions required to perform the task.
Input and Output (I/O) system: The I/O system includes the external ports of the DSP, its timers, display units, and various other features that help a person use the system to manipulate digital signals.
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