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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/72630

    Title: 用於多訊號源合作通訊的分散式相差空時調變;Distributed Differential Space-Time Modulation for Multi-Source Cooperative Communications
    Authors: 簡嘉良;Jian, Jia-Liang
    Contributors: 通訊工程學系
    Keywords: 合作通訊;分散式相差空時調變;Cooperative Communications;Distributed Differential Space-Time Modulation
    Date: 2016-11-23
    Issue Date: 2017-01-23 17:08:15 (UTC+8)
    Publisher: 國立中央大學
    Abstract: 在不具備多根天線的情況下,合作通訊可以有效獲取空間多樣性。而分散式空時碼為一種合作通訊技術,它藉由多個具備一根天線的中繼點相互合作形成虛擬的陣列天線,以獲取空間多樣性,並獲得更好的系統效能。其中,分散式相差空時調變藉由相差編碼,可以使接收端不需要知道通道係數。
    ;Cooperative communications can achieve the spatial diversity effectively without using multi-antennas. Distributed space-time coding, one kind of cooperative communications, uses multiple relays with single antenna to form virtual antenna arrays. By doing so, it acquires spatial diversity and thus improves the system performance. Among them, distributed differential space-time modulation utilizes differential encoding such that the receiver does not need channel coefficients.
    In this thesis, we study differential space-time network coding for multi-source cooperative communications which overcomes the problems of imperfect synchronization and complicated channel estimation. We propose to use distributed differential space-time modulation for multi-source cooperative communications, and compare its error performance with differential space-time network coding. According to the simulation results, distributed differential space-time modulation scheme which we proposed has better error performance than network coding, irrespective of synchronization issue.
    Appears in Collections:[通訊工程研究所] 博碩士論文

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