Which digital signal outcome occurs when exceeding the Nyquist sampling rate's limit imposed on a Quadrature Amplitude Modulation (QAM) signal processing system?

💡 Explanation

Inter-symbol interference (ISI) increases because exceeding the Nyquist limit creates overlapping symbols in the time domain, causing distortion. This degrades signal fidelity; therefore ISI will worsen, rather than improving amplitude recovery or noise characteristics, under this limiting condition.

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