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Effects of Ideal Clipping on Signal to Noise Ratios—A Comparison with Linear Systems

Numerous articles have been published that show there is a S/N ratio loss of 1.17 dB when sinusoidal signal and narrow‐band noise, with low input S/N ratio, is passed through a hard limiter. In this paper, we analyze the effects of wideband noise on signals due to clipping. It is shown that the resulting loss in S/N ratio depends not only upon the shape of the input noise spectrum but also on the location of the signal. Results are presented for real world spectra as measured in the ocean, and it is shown that for certain kinds of spectra the loss could be as high as 10 dB.