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Q. In signaling scheme, the bit error rate can be reduced by
- Correct Answer - Option(D)
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A
In signaling schemes, the bit error rate (BER) can be reduced by decreasing the data rate, as higher data rates increase the likelihood of errors due to more bits being transmitted per second under the same noise conditions.
The options provided in the question are:
(A) Increasing the bandwidth: This typically increases the error rate, as higher bandwidth allows more noise and interference to affect the signal.
(B) Decreasing the bandwidth: While reducing bandwidth might limit noise, it does not directly address the core relationship between data rate and BER6.
(C) Increasing data rate: This worsens BER, as faster transmission leaves less time to distinguish between signal levels, amplifying error susceptibility.
Since none of the listed options (A, B, or C) correctly describe a method to reduce BER, the correct answer is (D) None of the above. The optimal approach involves lowering the data rate or improving error correction techniques, neither of which is reflected in the given choices.
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