Application of Blind Signal Separation Methods in the Problems on Improving the Interference Immunity of Space Communication Systems with Quadrature Amplitude Modulation

The paper focuses on the issues of improving the interference immunity of space communication systems with quadrature amplitude modulation. As one of the possible approaches, the application of methods of blind separation of signals and interference in the receive paths of space communication channels is considered. Using the method of independent component analysis as an example, the interference immunity of communication channel with quadrature amplitude modulation is assessed during the operation in a complex interference environment including pulse noise-like interference. The bit error rate is considered as the main indicator characterizing the interference immunity of a radio system. The method of simulation modeling was used for the research. Within the independent component analysis method, the efficiencies of its implementation algorithms, such as SOBI, AMUSE, and CubICA, are compared.