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Сигнально-кодовые конструкции для работы в условиях мощных полосовых помех

Труды СПИИРАН. 2016. № 46. С. 14-26.
Крещук А. А., Зяблов В. В., Потапов В. Г.

In this paper, we consider data transmission in “bad” channels with low snr and wideband interference. We propose a code construction based on frequency shift keying with fast frequency hopping having the rate of 1.5 bit per OFDM symbol. This code construction allows transmitting data in channels with string wideband interference and high noise levels, including with SIR equal to -30 dB and SNR equal to -9 dB. We also propose two new decoders that are more robust in regard to interference compared with the known OSN decoder. The first one, based on the Kolmogorov-Smirnov criterion, is more robust in case of very strong interference, while the second decoder has a wider working range for weaker interference and interference with narrower band. The computer simulation has shown that the proposed decoders have higher error correction efficiency than the previously known decoder. Thus, they can be recommended for use in real systems.