Ziyad T. Improving the quality of communication systems WiMAX with MIMO in conditions of multibeam interference

Object - processes functioning systems WiMAX with MIMO. The purpose - improving the communication quality WiMAX technology with MIMO in multipath interference conditions. Methods - probability theory, optimization theory, theory of estimation and control, space-time signal processing, mathematical modeling. Results - а new method of adaptive modulation in MIMO channels based on a choice multi-position modulation with large numbers of position in space channels with low fading and it is choice less numbers of position in channels with large fading; a new method of adaptive modulation in frequency domain, based on detection selective fading in specific frequency sections of the channel and change the type of modulation OFDM subcarriers of suitable group; а new method of estimation the parameters separated MIMO channels based on Kalman filtering, which provides higher quality and speed estimation necessary for adaptive choice of modulation format. It is introduced - in the research scientific work № DR 0111U002627, used in learning process in the discipline "Systems of subscriber radio access". Sphere of application - broadband wireless access system with MIMO