Digital Communications

 

Block Diagram of Digital Communication System.

 DCS Vs ACS.

Signal to Noise Ratio in Delta Modulation.

 Signal to Noise Ratio in PCM.

Adaptive Delta Modulation

Drawbacks in Delta Modulation (or) errors in Delta Modulation

Probability of error of ASK.

QPSK Transmitter and Receiver.

Compression laws (A-law and U-law).

Non Uniform Quantization in PCM.

Condition required to eliminate Slope Overload Distortion in Delta Modulation.

Matched Filter, impulse response h(t) .

Correlation Receiver (Special case of Optimum Receiver).

Mutual Information I(X ; Y) – Properties.

Pulse Code Modulation (PCM).

Phase Shift Keying (PSK).

Differential Pulse Code Modulation (DPCM).

Drawbacks in Delta Modulation (or) errors in Delta Modulation

Adaptive Delta Modulation(ADM).

Probability of error of ASK

Probability of error of PSK.

QPSK equation, wave forms and Signal space diagram.

Burst and Random error correcting codes.

Amplitude Shift Keying(ASK).

Frequency Shift Keying (FSK)/BFSK

FSK Generator /BFSK generator

Optimum Filter.

Binary Cyclic Codes.

Problem1-Cyclic Codes.

Problem2-Cyclic Codes.

Problem3- Cyclic codes

Probability of error of Optimum filter

Base band Vs Pass band Transmission

Probability of error of Matched Filter

Compression laws (A-law and u-law)

Digital Communications tutorial questions

Mutual Information I(X ; Y) – Properties

Types of digital Modulation techniques (or) systems:-

Digital Communications Slip Test Questions

Digital communications Question bank Units 3,4,5

Digital Communications Quiz with solutions

Digital Communications Quiz unit-3

 

 

 

 

 

 

 

 

 

 

 

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