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D5829 Pages: 2

With a neat Sketch discuss the various steps involved in PCM.
Given the bit pattern 101110001. Encode the stream using BFSK and QPSK.
Explain frequency division multiplexing. How is interference avoided by using
FDM?
Explain the analog modulation techniques briefly.
Discuss Synchronous Optical NETwork (SONET).
PART E

Answer any four full questions, each carries 10 marks
In a CRC error-detecting scheme, choose divisor polynomial P: x * + x + 1.
Encode the bits 10010011011.

Why would you expect a CRC to detect more errors than a parity bit?

What is meant by Hamming distance?

Derive a Hamming code for single bit error correction (For a data of length 7
Bit).

Discuss synchronous transmission. How is synchronization provided for
synchronous transmission?

What is a major disadvantage of asynchronous transmission?

Explain the difference between datagram and virtual circuit operation.

What is the significance of packet size in a packet-switching network?

What are the advantages of packet switching compared to circuit switching.
What is meant by setup phase in circuit switching?

Explain the following terms:

i) DSSS ii) FHSS

KKK

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