Fig. 1.

Exact intrinsic SNR enhancements computed with Eq. (1) of the time domain of an exponential signal acquired through nonuniform sampling with an exponentially weighted density that equals the signal decay (matched) or which is biased to even shorter times (exponential weighting two, three or of our times the decay rate of the signals, e.g. 2×, 3×, or 4×). The NUS-based improvements are most compelling at long times, while diminishing returns are encountered when the exponential weight is about three times the signal decay