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- W2488853496 abstract "In underwater acoustic communication, the transmitted signals are severely influenced by the reflections from both the sea surface and the sea bottom. As very large reflection signals from these boundaries cause an inter-symbol interference (ISI) effect, the communication quality worsens. A channel estimation-based equalizer is usually adopted to compensate for the reflected signals under the acoustic communication channel. In this study, a feed-forward equalizer (FFE) with the least mean squares (LMS) algorithm was applied to a quadrature phase-shift keying (QPSK) transmission system. Two different types of equalizers were adopted in the QPSK system, namely a real-coefficient equalizer and a complex-coefficient equalizer. The performance of the complex-coefficient equalizer was better than that of two real-coefficient equalizers. Therefore, a Hilbert transform was applied to the real-coefficient binary phase-shift keying (BPSK) system to obtain a complex-coefficient BPSK system. Consequently, we obtained better results than those of a real-coefficient equalizer." @default.
- W2488853496 created "2016-08-23" @default.
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- W2488853496 date "2016-06-30" @default.
- W2488853496 modified "2023-09-23" @default.
- W2488853496 title "Performance Evaluation of the Complex-Coefficient Adaptive Equalizer Using the Hilbert Transform" @default.
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- W2488853496 doi "https://doi.org/10.6109/jicce.2016.14.2.078" @default.
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