Determination of the Steepness of the Discriminatory Characteristic for the Meter of non-Energy Parameters of the Signal

The simultaneous influence of multiplicative and additive noises on the steepness of the discriminative characteristic of a two-channel discriminator is analyzed. A coherent signal and a sequence of incoherent pulses are used as input signals. It is assumed that, at a relatively low level of noise, the tracking meter is considered as a linear system. Conditions are obtained when systematic measurement errors are absent. The expressions for determining the steepness of the discriminative characteristic affected by multiplicative noise depending on the additive noise level are obtained. It is shown that multiplicative noise has a greater influence on the steepness of the discriminative characteristic when the level of additive noise is higher. Coefficients determining the normalizing effect of the automatic gain control are obtained. It is shown that the type of the input signal does not change the physical nature of the influence of multiplicative and additive noises on the steepness of the discriminative characteristic.