Given below are two statements : Statement I : Turbo codes exhibit performance, in terms of bit error probability, that is very close to the Shannon limit and can be efficiently implemented for high speed use...

 

87) Given below are two statements :

Statement I : Turbo codes exhibit performance, in terms of bit error probability, that is very close to the Shannon limit and can be efficiently implemented for high speed use

Statement II : Convolutional codes provide worst performance in noisy channels where a high proportion of the bits are in error

In the light of the above statements, choose the correct answer from the options given below :

(1) Both Statement I and Statement II are true

(2) Both Statement I and Statement II are false

(3) Statement I is true but Statement II is false

(4) Statement I is false but Statement II is true

Answer: C

• Statement I: True. Turbo codes were the first practical codes to closely approach the Shannon capacity limit. They can be implemented efficiently, though their iterative decoding adds some latency.

• Statement II: False. Convolutional codes actually provide excellent performance in noisy channels for correcting random errors. They are widely used precisely because they perform well in noisy environments. While they may be outperformed by more modern Turbo or LDPC codes at very high noise levels, calling their performance "worst" is technically incorrect.

Statement I is true, but Statement II is false.
Answer: (3)

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