Which distance is related to the error correcting capability of the code?
  • a) Maximum distance
  • b) Minimum distance
  • c) Maximum & Minimum distance
  • d) None of the mentioned
A catastrophic error is an event whereby ______ number of code symbol error causes _______ number of decoded data error bits.
  • a) Finite, finite
  • b) Finite, infinite
  • c) Infinite, finite
  • d) Infinite, infinite
A code should be selected such that it should
  • a) Not have catastrophic error propagation
  • b) Have minimum free distance
  • c) All of the mentioned
  • d) None of the mentioned
The error correcting capability of a code scheme increases as the
  • a) Number of channel symbols per information bit increases
  • b) Bandwidth increases
  • c) Information per bit increases
  • d) All of the mentioned
Which has a limited resolution?
  • a) Hard decision decoder
  • b) Soft decision decoder
  • c) Hard & Soft decision decoder
  • d) None of the mentioned
Which parameter is used in soft decision algorithm?
  • a) Euclidean distance
  • b) Euclidean distance squared
  • c) Euclidean distance & distance squared
  • d) None of the mentioned
Which factor is desirable?
  • a) Minimum correlation
  • b) Maximum correlation
  • c) Maximum distance
  • d) None of the mentioned
Soft decision results in
  • a) Increase in complexity
  • b) Decrease in storage
  • c) Increase in complexity & Decrease in storage
  • d) None of the mentioned
A feedback decoder makes hard decision.
  • a) True
  • b) False
The look ahead length L is given by
  • a) m+1
  • b) m-1
  • c) (m+1)/2
  • d) 1-m
On increasing L
  • a) Coding gain increases
  • b) Complexity increases
  • c) Coding gain & Complexity increases
  • d) None of the mentioned
Reed Solomon codes are
  • a) Non binary
  • b) Cyclic
  • c) Non binary & Cyclic
  • d) None of the mentioned
The minimum distance for Reed Solomon code is given by
  • a) n+k+1
  • b) n-k+1
  • c) 1-n-k
  • d) 1+n-k
R-S codes have
  • a) High code rate
  • b) Low redundancy
  • c) High code rate & Low redundancy
  • d) None of the mentioned
Greater the redundancy greater will be the error correcting capability.
  • a) True
  • b) False
A primitive element are those which yield ______ when raised to higher order exponents.
  • a) All zero elements
  • b) Non zero elements
  • c) Unity elements
  • d) None of the mentioned
If the inversion was performed correctly, then the multiplication of the original matrix with the inverted matrix should yield identity matrix. This is known as
  • a) Identity theorem
  • b) Safety theorem
  • c) Multiplication theorem
  • d) Inversion theorem
0 h : 0 m : 1 s