Within a convolutional error-correcting code used in satellite communication, which mechanism explains why increasing the constraint length improves bit error rate?

💡 Explanation

Increasing the constraint length in convolutional codes improves bit error rate because it augments the temporal redundancy within the code, therefore increasing the minimum Hamming distance between valid codewords. This improved distance makes errors less likely to be misinterpreted, rather than other options that focus on secondary or unrelated effects.

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