Information theory and coding questions with answers
90 multiple-choice questions. Open any question for its answer and explanation.
- Which among the below stated logical circuits are present in encoder and decoder used for the implementation of cyclic codes? 1. Shift Registers 2. Modulo-2 Adders 3. Counters 4. Multiplexers
- The distance between each symbol in given sequence and reference sequence is known as . . . . . . . .
- According to Shannon's second theorem, it is not feasible to transmit information over the channel with . . . . . . . . error probability, although by using any coding technique.
- For the 4 states of an encoder on vertical axis of Trellis diagram, what do/does the solid line indicate/s?
- The minimum distance of linear block code (dmin) is equal to minimum number of rows or columns of HT, whose . . . . . . . . is equal to zero vector.
- For a Gaussian channel of 1 MHz bandwidth with the signal power to noise spectral density ratio of about 104 Hz, what would be the maximum information rate?
- Which is more efficient method?
- In minimal polynomial, . . . . . . . . degree polynomial is present with coefficients in the basefield along with the zeros in extension field.
- Basically, Galois field consists of . . . . . . . . number of elements.
- Which among the following is used to construct the binary code that satisfies the prefix condition?
- If the channel is bandlimited to 6 kHz & signal to noise ratio is 16, what would be the capacity of channel?
- In digital communication system, if both power and bandwidth are limited, then which mechanism/choice is preferred?
- Which type of channel does not represent any correlation between input and output symbols?
- Coded system are inherently capable of better transmission efficiency than the uncoded system. A. True B. False
- In Trellis diagram, what do/does the horizontal axis represent/s?
- In Viterbi's algorithm, which metric is adopted for decision making?
- At any given time, the output of an encoder depends on . . . . . . . .
- In coding gain & bandwidth of TCM, if the signal energy is kept constant, the . . . . . . . . of constellation reduces the noise margin and results into the degradation of performance.
- On which factor/s do/does the channel capacity depend/s in the communication system?
- Entropy of a random variable is
- With respect to power-bandwidth trade-off, for reducing the transmit power requirement, the bandwidth needs to be . . . . . . . .
- In digital communication system, smaller the code rate, . . . . . . . . are the redundant bits.
- What is significance of D-frames in video coding
- Which type of ARQ system introduces the transmission delay between the transmitter and receiver before the reception of frame at receiver for the purpose of error detection?
- Which amount the following is capable of correcting any combination of three or fewer errors random errors in a block of 23 bits?