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  1. 1

    Underwater acoustic communications based on differential chaos shift keying by Hongying DAI, Menglei CHEN, Weikai XU

    Published 2019-09-01
    Subjects: “…multicarrier differential chaos shift keying…”
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    Multiuser cyclic shift keying spread spectrum underwater acoustic communication by Cheng-bing HE, Shao-jing JING, Fei HUA, Rui XI, Rui-yu ZHANG, Wen-tao SHI, Qun-fei ZHANG

    Published 2017-07-01
    “…Aiming at the problem of low data rate and high receiver complexity of existing direct sequence spread spectrum code division multiple access (DS-CDMA),a novel code division multiple access (CDMA) using cyclic shift keying (CSK) signaling,namely CSK-CDMA,was proposed for multiuser underwater acoustic communication.The proposed method used the cyclic correlation characteristic of spread spectrum signals with M-ary modulation to provide a higher data rate than conventional.Passive time reversal technology was employed to suppress inter-code interference between users and the co-channel interference.The quasi-orthogonality of spread spectrum code was used to improve the processing gain.Multiuser communications are demonstrated with lake experimental recorded data under the condition of 5.27 km distance and complex multipath interference.The data rate is 39 bit/s/user for 6 users with bit error rate around 10<sup>-2</sup>~10<sup>-4</sup>.…”
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    Phase-Shift Keying Modulated Data Signal Using SOA-MZI-Based All-Optical Logic AND Gate at 80 Gb/s by Amer Kotb, Yasser Mohamed

    Published 2018-01-01
    “…All-optical logic AND operation with phase-shift keying (PSK) modulated data signals based on a semiconductor optical amplifier (SOA) assisted Mach-Zehnder interferometer is numerically analyzed and investigated. …”
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    A Secure Image Transmission Scheme Based on Improved DCSK by Lifang He, Gang Zhang, Tianqi Zhang

    Published 2013-06-01
    Subjects: “…differential chaos shift keying…”
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    Decision feedback demodulation algorithm for recursive SOQPSK-TG signal by UNJin-hua S, ANHui-mei H

    Published 2014-07-01
    Subjects: “…shaped offset quadrature phase-shift keying…”
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