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標題: | 完美自我干擾消除之全雙工單載波頻分多接取上行之通訊系統 A Full-Duplex SC-FDMA Uplink Cellular Radio System with Perfect Self-Interference Cancellation |
作者: | Bo-Siang Siao 蕭伯祥 |
指導教授: | 鐘嘉德 |
關鍵字: | 全雙工通訊,單載波頻分多接取系統,自我干擾消除, Full-duplex,SC-FDMA,self-interference cancellation, |
出版年 : | 2017 |
學位: | 碩士 |
摘要: | 全雙工通訊是在5G通訊系統中一個很有潛力的技術,他跟半雙工通訊系統比起來最多可以提升至兩倍的頻譜效率。然而,全雙工系統的頻譜效率主要受限於自我干擾,所以自我干擾這項因素必須被消除,其中一種自我干擾消除的方法是數位消除,他主要的訴求是將自我干擾的強度降到雜訊的等級,然而數位消除的效能主要受限於通道估計錯誤,在第14篇參考文獻中,提出了一種完美自我干擾消除的方法,他可以不用理會通道估計錯誤,還可以將自我干擾完美的消除,不過還是有缺點,在預編碼正交分頻多工系統,當頻譜效率接近1或大於1時,他會遭遇很大的多重接取干擾。在這篇論文中,提出了一種全雙工單載波頻分多接取上行系統的方法,當頻譜效率接近1時,它可以避免多重接取干擾,且與預編碼正交分頻多工系統比起來可以有較好的錯誤率表現。 Full-duplex (FD) communication is a promising technique in the fifth generation system. It can at best double the spectral efficiency compared with the traditional half-duplex (HD) communication system. Nevertheless, the spectral efficiency of the FD system is mainly constrained by self-interference. Thus, self-interference must be cancelled. One of the self-interference cancellation method is digital cancellation. It aims to suppress the self-interference into the noise floor. However, the channel estimation error dominates the performance of digital cancellation. In [14], a perfect digital self-interference cancellation method is proposed. It can perfectly cancel the self-interference regardless of channel estimation errors. However, it suffers great MAI problems when the spectral efficiency is close to 1 or larger than 1 in MC-CDMA uplink systems. In this thesis, a FD SC-FDMA uplink system is proposed. It can avoid MAI and has better performance if the spectral efficiency is close to 1 when the MMSE receiver is used in both systems. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/68923 |
DOI: | 10.6342/NTU201702678 |
全文授權: | 有償授權 |
顯示於系所單位: | 電信工程學研究所 |
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ntu-106-1.pdf 目前未授權公開取用 | 2.18 MB | Adobe PDF |
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