Adaptive Signal Processing Nonlinear Block with Quadrature Generators Under Influence Broadband Noise

Abstract

The issues, related to the synthesis of algorithms of adaptive nonlinear processing that are implemented through blocks of nonlinear processing with quadrature generators, are reviewed and analyzed. The use of adaptive nonlinear processing in the detection of weak signals against the background noise allows to take into account the density probability distribution and the sensitivity change of amplitude transfer characteristics of the blocks of nonlinear transformation to the magnitude of the current mismatch. We analyzed the operation of adaptive nonlinear block with the feedback the quadrature generators when exposed to broadband noise. It is shown that the task of adaptive nonlinear block is to achieve maximum noise reduction ratio and continuous tracking it when you change probabilistic properties of impact noise and in the presence of external disturbances. Its show the limitations imposed on the dynamic range of adaptive nonlinear block with quadrature generators.