PTU B.Tech ECE 6th & 7th Semester Paper 2012 Digital Communication Punjab Technical University Exam 2012 6th & 7th Sem Digital Communication Test September and March Question Paper Free Download Punjab Technical University Digital Communication Question Papers 2012 PTU B.Tech ECE 6th & 7th Semester Question Paper 2012 for all students Previous Year old Past Papers of PTU B.Tech ECE 6th & 7th Sem Paper 2012 Digital Communication Punjab Technical University September 2012 and March 2012 Exam B.Tech ECE 6th & 7th Semester Sample Model Question Papers Free Download PDF
a) What are the advantages of digital communication systems over analog communication systems?
b) What are tlie sampling rates of the following signals: voice at 5kHz. high fidelity music at 20 kHz.
c) In a PCM system, the signal to noise (quantization noise) ratio is to be held to a minimum of 40 dB. Determine the number of quantization levels needed.
d) Describe the difference between uniform and non-uniform cuinpandrng.
e) Explain Nyquist criterion for distortion less base band binary transmission.
f)Why is clock recovery required in a BPSK demodulator circuit?
g)What is MSK modulation scheme?
h) Suggest some pulse shaping filter function to ensure zero intersymbol interference.
State the difference between coherent and non-coherent detection. Differentiate between unipolar and bipolar signalling.
PTU B.Tech ECE 6th & 7th Sem Paper 2012 Digital Communication