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(a) Which one of the four digital-to-analog conversion techniques (ASK, FSK, PSK or QAM) is most susceptible to noise? Explain your answer.
(b) Given the bit pattern 01001110, sketch the waveforms for NRZ-L, Bipolar AMI, Pseudoternary, Manchester and Differential Manchester encoding. Assume that the most recent preceding 1 bit for AMI has a negative voltage and the most recent preceding 0 bit for Pseudoternary has a negative voltage.
(c) PCM is based on the Nyquist Sampling theorem.
(i) State the Nyquist Sampling theorem.
(ii) A complex low pass signal has bandwidth of 200 kHz. What is the minimum sampling rate for this signal?
(d) What is the maximum data rate for a voice-grade line with a bandwidth of 4 kHz and a S/N ratio of 10000 to 1? Also, what is the maximum data rate if the S/N ratio is now enhanced to 50 dB?
Write a short explanation of the principles of super-heterodyne receiver. It may help to use sample block diagram to state the process. Why is the production of the intermediate fr
A small signal amplifier circuit is given in figure Q 4. The values of RD and RS must be set such that the gain of the system is 8. It is also known that Vgs = ¼ Vp. a). Per
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outline what three features you would add (choose the three that you feel would be most advantageous) to the 16 bit version of the processor in order to enhance its power.
LHLD Load HL Pair Direct Instruction This instruction is used to copy the content of memory location specified by opened in register L and copy the content of next m
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What is Global Positioning Satellites (GPS) Global positioning satellite (GPS) systems are used to determine exact location of a car, ship, airplane or any conveyance that trav
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