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Biorthogonal codes needs ________ bandwidth as orthogonal codes.

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Biorthogonal codes needs ________ bandwidth as orthogonal codes.

(a) Equal

(b) Double

(c) Half

(d) Triple

This question was addressed to me in final exam.

This interesting question is from Waveform Coding topic in section Channel Coding of Digital Communications

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Correct choice is (c) Half

The explanation: Biorthogonal codes perform better than the orthogonal codes and it needs only half the bandwidth as orthogonal codes.

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