1) For fixed symbol rate, increase in bits/symbol ultimately improves r_{b}/B bits/s/Hz & hence, regarded as _____.  Published on 20 Nov 15
a. Power efficiency
b. Spectral efficiency
c. Transmission efficiency
d. Modulation eficiency

2) For designing a communication system, which among the following parameters should be maximum?
A. Transmission rate B. Received signaltonoise ratio C. Error probability D. Bandwidth requirement  Published on 20 Nov 15
a. A & B
b. C & D
c. A & C
d. B & D

3) For designing trellis code, the emphasis must be on maximizing __________  Published on 20 Nov 15
a. Euclidean distance between code vectors
b. Hamming distance of error correcting codes
c. Both a and b
d. None of the above

4) d_{free} is defined as the Euclidean distance of coded signal in terms of _________ possible distance between all allowed sequences.  Published on 20 Nov 15
a. smallest
b. largest
c. average
d. constant

5) The distance between each symbol in given sequence and reference sequence is known as _______.  Published on 20 Nov 15
a. Euclidean Distance
b. Distance between sequences
c. Manmattan Distance
d. Hamming Distance

6) To obtain the transfer function of a convolutional code, the splitting of allzero state takes place into ___
A. starting state B. first return to allzero state C. inbetween state  Published on 20 Nov 15
a. A & B
b. B & C
c. A & C
d. None of the above

7) For a received sequence of 6 bits, which decoding mechanism deals with the selection of best correlated sequence especially by correlating the received sequence and all permissible sequences?  Published on 20 Nov 15
a. Soft Decision Decoding
b. Hard Decision Decoding
c. Both a and b
d. None of the above

8) Which decoding method involves the evaluation by means of Fano Algorithm?  Published on 20 Nov 15
a. Maximum Likelihood Decoding
b. Sequential Decoding
c. Both a and b
d. None of the above

9) For the 4 states of an encoder on vertical axis of Trellis diagram, what do/does the solid line indicate/s?  Published on 20 Nov 15
a. '0' input
b. '1' input
c. Both a and b
d. None of the above

10) In Trellis diagram, what do/does the horizontal axis represent/s?  Published on 20 Nov 15
a. Continuous time
b. Discrete time
c. Sampled time
d. All of the above
