Satellite communications links´ energy capacities required to provide interference immunity receiving of phase shift keyed signals in case of non-linear transponder

The performance of satellite communications links with digital signals operating through a transponder with a non-linear input-output power and phase-input power relationships is considered. It is possible to simplify the calculations of the effects of the link signals interaction in their passage through the transponder if the pair of weight functions of the non-linear input-output power and phase-input power relationships are used for interpolation of the non-linearity. Taking into account that the signals at the input of the earth station decisive units are represented in the form of the sum of components with known probability density functions and changing the order of the averaging over the random signals´ parameters in calculating the error probability, the estimations of the signal probability density function characteristics at the decisive unit input are obtained. The relationship of one binary symbol error versus transmitting signal power in this link when the power of the other links is also determined