Zhuchenko A. Method of iterative decoding turbo codes with reduced complexity in telecommunication systems

Object of research - process of decoding turbo codes in telecommunication systems. The purpose of research - reduction of complexity of a method of iterative decoding turbo codes with given of the set reliability of the transmitted information in telecommunication systems. Methods of research - methods of probability theory, combination theory, the theory of sets, theories of coding, the statistical theory of communication and mathematical statistics. Practical value of the received results - program realization of a method of iterative decoding turbo codes the reduced complexity that allows to reduce complexity of decoding depending on the relation signal/noise of the channel in 2,0?3,9 time is developed and to reduce a memory size necessary for realization interleaving sequences of various length, in 2?5 time at insignificant increase bit error rate. Practical recommendations on use of a method of iterative decoding turbo codes the reduced complexity in telecommunication systems are developed; the algorithm of a choice of parameters of codes of Reed - Solomon is developed at use turbo codes in concatenated code designs. Scientific novelty of the received results - has received the further development a method of iterative decoding turbo codes, distinguished from known for application of procedure combination of a decoders turbo decoders with various algorithms of decoding which allows to reduce complexity of decoding at insignificant increase in probability bit error rate; has received the further development a method estimation of a dispersion noise of the channel, distinguished from known for the account estimation of a dispersion soft decisions turbo decoder which allows to enter in turbo decoder control quality of iterative decoding without increase complexity of hardware realization turbo decoder for reduction complexity of decoding; for the first time analytical expression for an estimation correlation of soft decisions iterative turbo decoder on the second iteration which use allows to increaseaccuracy of an estimation of influence structure interleaver on efficiency of iterative decoding turbo codes is received; the method formation of structure interleaver for interleaving sequences of various length for minimizing correlation soft decisions turbo decoder and distinguished from restriction known for absence on values of length of interleaving sequences which allows to reduce complexity method of iterative decoding turbo codes due to reduction of the memory size necessary for interleaving sequences of various length is advanced. Results of dissertation are realized - in educational process of the Kharkov university of Air Forces, in three research works and on manufacture.