Ischenko M. Signal-to-code designs for wireless space-time coding systems

Signal-code sequences for wireless communication systems with space-time coding are the object of the research. Noise immunity characteristics as well as parameters of signal-code sequences for wireless communication systems with space-time coding are the subject of the research. Research methods are the following: methods of probability theory, theory of potential noise immunity, theory of antinoise coding, mathematical statistics, mathematical modeling and simulation. The results of the research are the following: the invariance property of trellis signal-code sequences was stated, the optimality criterion of trellis signal-code sequences for wireless communication systems with Rayleigh fading channels was defined, the emulation method and algorithm of sorting search of trellis signal-code sequences were developed, computer model of communication system with space-time coding was created for the research of the noise immunity of trellis signal-code sequences in Rayleigh fading channels. The novelty of the work is in the following the basic properties of invariance of modulation codes were found and further used for optimization of signal-code sequences for systems with space-time coding; the optimality criterion of trellis signal-code sequences for Rayleigh fading channels was grounded; the process of search of optimal convolution codes and signal-code sequences in accordance to criterion of maximal free distance was improved; the theoretical grounding of effectiveness of signal-code sequences use for wireless communication systems with space-time coding and Rayleigh fading channels was further developed as well as mathematical model of the wireless communication system with space-time coding was grounded; the method of search of optimal signal-code sequences for wireless communication systems with space-time coding was proposed. The research results were applied to the study process in Odessa National Academy of Telecommunications n.a. A.S. Popov and also were used by Nikolayev branch of PC “Ukrtelecom”.