Data encoding schemes plays an important role to improves system performance.Various signal encoding techniques are as follows,
Digital encoding:
Unipolar:
- The polarity of pulse refers to weather it is positive or negative.
- It is called unipolar encoding because it uses only one polarity.
- The polarity is assigned one of the two binary states 1 & 0.
Polar:
- It uses two voltage levels positive and negative.
- Various polar encoding method are used among them important are Non return to zero (NRZ), Return to zero (RZ) & biphase.
Polar:
