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If we correlate the received signal with any one of the two orthogonal function, the obtained inner product will be

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If we correlate the received signal with any one of the two orthogonal function, the obtained inner product will be

(a) In phase

(b) Quadrature

(c) Zero

(d) Cannot be determined

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This question is from Modulation Techniques in division Modulation and Coding Trade-off of Digital Communications

1 Answer

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Right answer is (c) Zero

The explanation is: If we correlate the received signal with only one of the orthogonal function for example sine, the inner product obtained will be zero.

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