Pulse Shaping
After going through different types of coding techniques, we have an idea on how the data is prone to distortion and how the measures are taken to prevent it from…
Data Encoding Techniques
Encoding is the process of converting the data or a given sequence of characters, symbols, alphabets etc., into a specified format, for the secured transmission of data. Decoding is the reverse process of…
Power Spectral Density
The function which describes how the power of a signal got distributed at various frequencies, in the frequency domain is called as Power Spectral Density PSDPSD. PSD is the Fourier Transform of…
Bipolar Signaling
This is an encoding technique which has three voltage levels namely +, - and 0. Such a signal is called as duo-binary signal. An example of this type is Alternate Mark Inversion AMIAMI. For a 1, the…
Unipolar Return to Zero RZ RZ
In this type of unipolar signaling, a High in data, though represented by a Mark pulse, its duration T0 is less than the symbol bit duration. Half of the bit duration remains high…
Polar Signaling
There are two methods of Polar Signaling. They are − Polar NRZPolar RZ Polar NRZ In this type of Polar signaling, a High in data is represented by a positive…
Line Codes
A line code is the code used for data transmission of a digital signal over a transmission line. This process of coding is chosen so as to avoid overlap and distortion of…
Delta Modulation
The sampling rate of a signal should be higher than the Nyquist rate, to achieve better sampling. If this sampling interval in Differential PCM is reduced considerably, the sampleto-sample amplitude…
Spread Spectrum Modulation
A collective class of signaling techniques are employed before transmitting a signal to provide a secure communication, known as the Spread Spectrum Modulation. The main advantage of spread spectrum communication technique…
Time Division Multiplexing (TDM)
Definition: A multiplexing technique by which multiple data signals can be transmitted over a common communication channel in different time slots is known as Time Division Multiplexing (TDM). it allows the…
