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The limit which represents the threshold Eb/N0 value below which reliable communication cannot be maintained is called as

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The limit which represents the threshold Eb/N0 value below which reliable communication cannot be maintained is called as

(a) Probability limit

(b) Error limit

(c) Shannon limit

(d) Communication limit

The question was asked in a job interview.

My enquiry is from M-ary Signalling and Performance in chapter Bandpass Modulation and Detection of Digital Communications

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Right choice is (c) Shannon limit

To explain: Eb/N0 curve has waterfall shape. Shannon limit gives the threshold value below which reliable communication cannot be maintained.

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