Аbdourahmane A. Improving quality of mobile communication in new generation systems on the basis of adaptation methods

Object – process of functioning of new-generation mobile communication systems with MIMO and OFDM. Purpose – to develop methods to improve quality of information transmission in new-generation mobile communication systems with MIMO and OFDM on the basis of usage of adaptive methods of modulation and coding, adaptive space-time and polarization signal processing. Subject – models and methods for improvement of communication quality in systems with MIMO and OFDM based on the usage of adaptive methods of modulation, multi-phase filtration, rotation of constellation diagram, space-time and polarization signal processing. Methods – space-time signal processing, simulation modelling and full-scale experiment. Results – improvement of method to increase the capacity of communication systems with MIMO and OFDM close to Shannon boundary, which distinctive feature consists in formation of own independent spatial and time channels; a method to assess parameters of spatial and time channels of communication systems with MIMO and OFDM has been proposed, based on the usage of multidimensional Kalman-Bucy filter; development of the method to increase capacity and interference immunity of mobile communication systems with OFDM, which distinctive feature is based on the usage of additional adaptive time equalization, multi-phase filtration; improvement of the method of space-time and polarization signal processing with anti-interference autocompensation, which, unlike the existing methods, is based on the usage of adaptive antenna array with pilot tone adaptation algorithm. Sphere of application – network telecommunication technologies engineering