Which consequence results when a local oscillator's frequency drifts in a software-defined radio (SDR)?

💡 Explanation

Drift causes carrier frequency offset propagated by the Numerically Controlled Oscillator (NCO) in digital down-conversion, increasing the cyclic redundancy check failure rate. Because demodulation shifts, it increases the bit error rate, therefore errors rise disproportionately, rather than an improved SNR.

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