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Explain correlation receiver with the help of suitable block diagrams
With the help of diagrams explain a non-coherent modulation scheme.
Explain Maximum Likelihood Decoding.
PART C
Answer any two full questions, each carries 20 marks
With suitable block schematic, explain RAKE receiver and its relevance in CDMA systems.
What is spread spectrum modulation? Explain its significance and applications in the field

of communication.
Explain the significance of PN sequences and explain the properties of PN sequences.

With the help of relevant diagrams, explain OFDM.

In a DS/BPSK system, the feedback shift register used to generate the PN sequence has
length m=19.The system is required to have an average probability of symbol error due to
externally generated interfering signals that does not exceed 10°. Calculate the following in
decibels: (i)Processing gain;(ii)Anti-jam margin

Explain the various multiple access schemes.

With the help of relevant block schematics, explain frequency hopping spread spectrum with
MESK. Distinguish between SFHSS and FFHSS

What are Gold codes?

بد بد ‎॥‏

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