Delta Modulation is a digital modulation technique used to represent discrete-amplitude signals. It is a special type of pulse modulation that uses a sequen...
Delta Modulation is a digital modulation technique used to represent discrete-amplitude signals. It is a special type of pulse modulation that uses a sequence of impulses to represent the amplitude of the signal.
The basic principle of delta modulation is that it shapes the amplitude of a signal by injecting a series of short, precise pulses at regular intervals. These impulses correspond to the amplitude of the signal at different points in time.
The shape of the pulses is called a carrier, and the spacing between pulses represents the time axis. The distance between consecutive impulses represents the sampling rate, which is the number of samples taken per second.
The resulting modulated signal is called a sampled delta modulated (SD) signal.
The main advantage of using delta modulation is that it provides an excellent representation of both the frequency and the amplitude of a signal.
Here's an analogy to help you understand delta modulation: Imagine a guitar string being plucked. The plucked string can be considered the amplitude of the signal, and the regular intervals between plucks can be considered the time axis. The impulses would represent the intensity of the plucked string at different times.
Overall, delta modulation is a powerful technique for representing discrete-amplitude signals and is widely used in various applications such as radar, telecommunications, and biomedical instrumentation