radioelectronicsИзвестия высших учебных заведений России. РадиоэлектроникаJournal of the Russian Universities. Radioelectronics1993-89852658-4794Saint Petersburg Electrotechnical Universityradioelectronics-86Research ArticleРАДИОТЕХНИЧЕСКИЕ СРЕДСТВА ПЕРЕДАЧИ, ПРИЕМА И ОБРАБОТКИ СИГНАЛОВRADIO ELECTRONIC FACILITIES FOR SIGNAL TRANSMISSION, RECEPTION AND PROCESSINGОценка состояния восходящего канала в системе множественного доступа с разреженным кодированиемChannel Estimation in Uplink SCMA SystemСергиенкоА. Б.SergienkoA. B.sandy@ieee.orgКлиментьевВ. П.KlimentjevV. P.vklimentyev@gmail.comСанкт-Петербургский государственный электротехнический университет "ЛЭТИ" им. В. И. Ульянова (Ленина)РоссияSaint Petersburg Electrotechnical University "LETI"Russian Federation201628042016022837Copyright © Сергиенко А.Б., Климентьев В.П., 20162016Сергиенко А.Б., Климентьев В.П.Sergienko A.B., Klimentjev V.P.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://re.eltech.ru/jour/article/view/86

Рассмотрено влияние ошибки оценки состояния восходящего канала с неселективными блоковыми замираниями на помехоустойчивость некодированной и кодированной систем множественного доступа с разреженным кодированием, относящихся к неортогональным системам множественного доступа. Приведены результаты исследования дисперсии ошибки оценки канала по неортогональным пилот-сигналам. Результаты моделирования свидетельствуют о том, что требуемая точность оценки канала зависит от длины кодового блока. Выполнено сравнение полученных результатов с границей Крамера-Рао.

The effect of channel estimation error on bit error probability of uncoded and coded sparse code multiple access (SCMA) system in uplink channel with block fading is considered. SCMA is a variety of non-orthogonal multiple access based on code division. The variance of channel estimation error is investigated for channel estimation based on non-orthogonal pilot signals. The results obtained by computer simulation show that required accuracy of the channel estimation depends on the code block length. These results are compared with Cramer-Rao bound.

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The authors declare that there are no conflicts of interest present.