Search academic texts

Information × Registration Number 0214U005825, 0112U000946 , R & D reports Title Research of adaptive methods of increase of efficiency of broadband radioaccess systems popup.stage_title Head M.E. Ilchenko, Registration Date 12-12-2014 Organization Research Institute of Telecommunications National technical university of Ukraine "KPI" popup.description2 The new link adaptation method was created based on multicriteria channel state estimates with fuzzy logic mathematical apparatus. Link adaptation algorithms where created with usage of unusual improved fuzzy inference algorithm based on both link state energy estimations and multicriteria estimations. Membership function construction rules where determined for transfer profiles membership functions, state estimates membership functions and prediction membership functions with probability density function estimates usage. As a result of the research optimal methods of link state estimates (energy, probability, and statistical), optimal types of modulation and noiseless coding for efficient link adaptation in wide broadband access systems where determined. A new method for probability estimates of link state where created, based on decisions in noiseless systems with FEC. Separate block implementation principles(modulators, demodulators, FEC encoders and decoders) where developed. Recommendations for using adaptive methods to increase efficiency of wide broadband wireless access in both OFDM and single carrier modulation systems. Research result obtained by simulation for both steady and unsteady links showed great efficiency of developed methods and link adaptation algorithms. Product Description popup.authors Івлєв Юрій Васильович Кайденко Владислав Миколайович Кайденко Микола Миколайович Кравчук Сергій Олександрович Крилач Олег Федорович Роскошний Дмитро Васильович popup.nrat_date 2020-04-02 Close