IDEAL LIMITING. PART 2. THE OPERATION OF AN IDEAL LIMITER ON SIGNALS IMBEDDED IN NOISE

Abstract : A study of the operation of an ideal limiter on simple sine-wave signals in additive Gaussian noise is made. The general theory of two signals in noise is worked out first and the results given in terms of an output power spectrum. Then, special cases (e.g., only one signal present, and two signals with various amplitude ratios) are examined to aid in visualizing what spectral changes are taking place. Emphasis is placed on the effect of a limiter on the input signal spectrum, on the input noise spectrum, and on the input-vs-output signal-to-noise ratio. The Narec Computer was used to obtain the results for the two-signal case. (Author)