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Which among the following is not a transmission detection technique?

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Which among the following is not a transmission detection technique?

(a) Matched filter detection

(b) Energy detection

(c) Cyclostationary detection

(d) Interference based detection

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I would like to ask this question from Next Generation Wireless Network in chapter Next Generation Wireless Network of Cognitive Radio

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Right answer is (d) Interference based detection

Explanation: Transmission detection is based on the identification of weak signals sent by the primary transmitter obtained by the local observations of the xG users. Transmitter detection is also known as non-cooperative method. Interference based detection and cooperation detection are other spectrum sensing techniques.

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