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In CDMA the incoming signal is _____ with the spreading code.

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In CDMA the incoming signal is _____ with the spreading code.

(a) Added

(b) Multiplied

(c) XOR-ed

(d) None of the mentioned

This question was posed to me in an online interview.

My question is taken from Spread Spectrum in division Spread Spectrum Techniques of Digital Communications

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The correct option is (b) Multiplied

The best I can explain: In CDMA, the incoming signal is multiplied with the spreading code.

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