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Итеративный приём многочастотных сигналов с неортогональным частотным уплотнением в каналах с замираниями

Iterative receiver of SEFDM signals in fading channels
Authors: Rashich, Andrey; Gorbunov, Sergey;

Итеративный приём многочастотных сигналов с неортогональным частотным уплотнением в каналах с замираниями

Abstract

Для приёма кодированных SEFDM-сигналов в каналах с частотно-селективными замираниями предложен итеративный алгоритм приёма, основанный на совместном применении ZF-эквалайзера эквивалентного OFDM-сигнала, алгоритма BCJR для демодуляции и декодирования сверточного кода. Проведен анализ помехоустойчивости приёма SEFDM-сигнала в многолучевых каналах с замираниями EPA 5Hz, EVA 70Hz, ETU 70Hz. Оценка помехоустойчивости приёма SEFDM-сигналов в условиях канала с замираниями выполнялась методами имитационного моделирования при условии идеального знания канала на стороне приёмного устройства. Описанный метод приёма обеспечивает низкую вероятность ошибки при относительно небольшом энергетическом проигрыше по сравнению с приёмом аналогичных ортогональных систем сигналов. Вычислительная сложность предложенного метода растет линейно при увеличении частоты. Разработанный метод применим как для малого, так и для большого числа поднесущих в сигнале.

An iterative receiver of SEFDM signal for the case of fading channel is proposed. The algorithm is based on the BCJR algorithm demodulator and soft decision decoder of convolutional code. Also the equivalent representation of SEFDM as OFDM with reduced number of subcarriers is used for equalization. The proposed algorithm provides small BER with relatively small energy loss compared to equivalent OFDM system. A study of SEFDM signals behavior in frequency selective fading channel is done. The proposed algorithm have computational complexity linearly increasing with the number of subcarriers and are applicable for any number of subcarriers in the multicarrier signal.

Keywords

BCJR, SEFDM, Multicarrier FTN, каналы с замираниями, неортогональные многочастотные сигналы, fading channels, NOFDM, 5G, OFDM

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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