本文選題：水聲通信　切入點(diǎn)：協(xié)作通信　出處：《哈爾濱工業(yè)大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：近年來,隨著海洋經(jīng)濟(jì)的不斷發(fā)展,以及軍事和商業(yè)應(yīng)用上的需求,水聲通信得到了商業(yè)界和學(xué)術(shù)界的廣泛關(guān)注。然而水聲信道的復(fù)雜多徑傳播、大傳播延遲、有限可用帶寬等特點(diǎn)對多用戶水聲通信的鏈路可靠性帶來了巨大的挑戰(zhàn)。為改善鏈路可靠性,本文將協(xié)作通信技術(shù)應(yīng)用于多用戶水聲通信,并在此基礎(chǔ)上針對水聲信道的特點(diǎn)展開研究,論文的主要研究內(nèi)容如下:首先,建立了非協(xié)作模式下的多用戶水聲通信系統(tǒng)模型,對水聲信道特性進(jìn)行了分析,并采用BELLHOP模型建立了水聲信道,在IDMA迭代多用戶檢測算法的基礎(chǔ)上,研究了基于固定抽頭長度的多用戶檢測。其次,針對抽頭長度會很大程度上影響多用戶檢測性能,以及計(jì)算復(fù)雜度的問題,提出了非協(xié)作模式下基于變抽頭長度的多用戶檢測方案,該方法使用抽頭長度更新算法根據(jù)水聲信道環(huán)境不同自適應(yīng)調(diào)整抽頭長度到最優(yōu),從而提高系統(tǒng)性能。為進(jìn)一步提高鏈路可靠性,引入?yún)f(xié)作通信技術(shù),建立了多用戶水聲協(xié)作通信系統(tǒng)模型,綜合考慮合并方式和抽頭長度對檢測性能的影響,提出了聯(lián)合自適應(yīng)合并和變抽頭長度(JACVT)的多用戶檢測方案。通過仿真分析驗(yàn)證了變抽頭長度多用戶檢測方案的可行性和有效性。最后,考慮頻譜資源利用率問題,引入同時(shí)同頻全雙工技術(shù),建立了基于自干擾消除的非協(xié)作多用戶水聲通信系統(tǒng)模型。針對該系統(tǒng)中自干擾現(xiàn)象嚴(yán)重問題,分析步長因子和濾波器階數(shù)對自干擾消除性能的影響,綜合考慮了自干擾、多址干擾和碼間干擾的消除,提出了基于變步長變階數(shù)自干擾消除的變抽頭長度(SIC-VT)多用戶檢測方案。同時(shí)在全雙工協(xié)作模式下,提出了基于自干擾消除的聯(lián)合自適應(yīng)合并和變抽頭長度(SIC-JACVT)多用戶檢測方案,進(jìn)一步提升系統(tǒng)性能。通過仿真分析了自干擾消除的影響因素,證明了變步長變階數(shù)多用戶檢測方案的性能優(yōu)勢。
[Abstract]:In recent years, with the continuous development of marine economy and the demand of military and commercial applications, underwater acoustic communication has received extensive attention in the commercial and academic circles. However, the complex multipath propagation of underwater acoustic channels leads to large propagation delays. The limited available bandwidth brings a great challenge to the link reliability of multi-user underwater acoustic communication. In order to improve the link reliability, this paper applies cooperative communication technology to multi-user underwater acoustic communication. On this basis, the characteristics of underwater acoustic channel are studied. The main contents of this paper are as follows: firstly, the multi-user underwater acoustic communication system model under non-cooperative mode is established, and the characteristics of underwater acoustic channel are analyzed. Based on the IDMA iterative multi-user detection algorithm, the multi-user detection based on fixed tap length is studied. Secondly, the tap length will greatly affect the performance of multi-user detection. As well as the computational complexity, a multi-user detection scheme based on variable tap length in non-cooperative mode is proposed. The tap length updating algorithm is used to adaptively adjust the tap length to the optimum according to the different underwater acoustic channel environment. In order to further improve the link reliability, a multi-user underwater acoustic cooperative communication system model is established by introducing the cooperative communication technology. The influence of combination mode and tap length on the detection performance is considered synthetically. A multiuser detection scheme based on combined adaptive merging and variable tap length (JACVT) is proposed. The feasibility and effectiveness of the multi-user detection scheme with variable tap length are verified by simulation analysis. Finally, the problem of spectrum resource utilization is considered. The simultaneous frequency full-duplex technique is introduced to establish a non-cooperative multi-user underwater acoustic communication system model based on self-interference cancellation. The effects of step size factor and filter order on the performance of self-interference cancellation are analyzed, and the elimination of self-interference, multi-access interference and inter-symbol interference are considered synthetically. A multiuser detection scheme for SIC-VT based on variable step size and variable order self-interference cancellation is proposed. At the same time, a joint adaptive merging and variable tap length SIC-JACVT multiuser detection scheme based on self-interference cancellation is proposed in full duplex cooperation mode. The influence factors of self-interference cancellation are analyzed by simulation, and the performance advantages of multi-user detection scheme with variable step size and variable order are proved.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TN929.3

【參考文獻(xiàn)】

相關(guān)期刊論文 前4條

1 劉建成;全厚德;趙宏志;唐友喜;;基于迭代變步長LMS的數(shù)字域自干擾對消[J];電子學(xué)報(bào);2016年07期

2 王俊;趙宏志;卿朝進(jìn);唐友喜;;同時(shí)同頻全雙工場景中的射頻域自適應(yīng)干擾抵消[J];電子與信息學(xué)報(bào);2014年06期

3 胡安平;高銳;張建春;;水聲信道傳輸特性研究[J];現(xiàn)代導(dǎo)航;2013年04期

4 胡劍浩;楊鳳;熊興中;;交織多址接入系統(tǒng)信道容量證明[J];電子科技大學(xué)學(xué)報(bào);2009年04期

相關(guān)博士學(xué)位論文 前1條

1 陶毅;淺海水聲信道抗多途跳頻通信系統(tǒng)研究[D];廈門大學(xué);2008年

，

本文編號：1564461