Volodymyr P. Methods and means of increase on efficiency of wireless systems and networks with a non-stationary communication channel.

The thesis is devoted to developing methods for designing systems and wireless communication networks. Wireless systems are analyzed taking into account the characteristics of communication channel - the multipath wave propagation mobility actual location of the caller, which leads to the unsteady nature of the communication channel. A contradiction considered between the length of characters to be transmitted through wireless communication channel, and the requirements of the channel to length characters. Particular attention is paid to increase the bandwidth of wireless systems and reduce probability of bit errors. The paper analyzes the properties of individual functional units of wireless systems and networks and was first proposed to use generalized characteristic frequency and the energy efficiency of individual nodes in the synthesis of efficient systems taking into account the integral imposed criteria. The effectiveness of using the technical resources of individual functional units of wireless systems, methods developed ways and means of this index as a whole was analyzed. In the methods of synthesis phased was grounded choice of separate functional units for synthesis of efficient wireless systems. Initially, considering the choice of effective synthesis types of modulation / demodulation is proposed. Depending on the results the decision about the need to use different functional units and their method of choice was carried out. Taking into account the results of analysis for wireless systems let to improve the reliability of existing software systems through redundancy.