SPECIFICATIONS OF AN INFORMATION PROCESSING INVARIANT SYSTEM IN CONDITIONS OF NONCOHERENT RECEPTION AND INACCURATE DETERMINATION OF THRESHOLDS

Abstract

An information processing invariant system based on a linear detector in conditions of inaccurate determination of thresholds is considered. Quantitative estimation of noise immunity of such a system with its further comparison with noise immunity of an ordinary binary system with non-coherent reception is carried out.

Full Text

The main requirement to an information processing system is undistorted transmission through communication channels with variable parameters. There are methods which are reduced to using of ARA, diversed reception, adaptive methods with a training signal, systems with feedback. These methods have both positive and negative characteristics. One of the drawbacks of the methods mentioned above is a difficulty in realization of transmission algorithms of signals with multilevel amplitude modulation. In the given paper the algorithm of multilevel amplitude modulated signals transmission through the channels with variable parameters is synthesized and quantitative estimation of the noise immunity in conditions of non-coherent reception is carried out. There is a communication channel restricted by the frequencies flow и fhigh. The state of the communication channel is defined by the stationary interval inside which the influence of multiplicative noise is described by the stability of the transmission coefficient k(t) on a certain frequency.