Final answer:
The student's question is about sketching waveforms for a given sequence of bits using different line coding schemes like Polar Non-Return to Zero coding, Bipolar Return to Zero coding, Unipolar Non-Return to Zero coding, and Manchester coding, which are methods of converting digital data to digital signals in digital communications.
Step-by-step explanation:
The student is asking about line coding in digital communications, specifically for generating waveforms for a given sequence of bits using different encoding schemes. Line coding is a method of converting digital data to digital signals. Here is a brief description of each coding scheme requested by the student:
- Polar Non-Return to Zero (NRZ) coding: In this scheme, a '1' is represented by a high voltage, while a '0' is represented by a low voltage. The signal does not return to zero between the bits, hence the name Non-Return to Zero.
- Bipolar Return to Zero (RZ) coding: '1' bits are represented as a pulse in one polarity (positive or negative), and '0' bits are represented by a pulse of the opposite polarity or no pulse at all. Each bit returns to zero voltage in the middle of the bit interval.
- Unipolar Non-Return to Zero coding: Here, a logical '1' is represented by a high voltage and a '0' is represented by zero voltage. Similar to Polar NRZ, the signal stays at the voltage level until the next bit whether it's another '1' or a '0'.
- Manchester coding: In Manchester coding, each bit has a transition from high to low or low to high in the middle of the bit interval. A '1' is typically represented by a low-to-high transition, and a '0' is represented by a high-to-low transition.
To represent the bits (0,1,1,0,0,1,0) in the respective line codings, you would sketch waveforms with specific characteristics for each coding scheme as explained above. This helps in understanding how digital data is represented and transmitted as digital signals over a communication medium.