本文關(guān)鍵詞：室內(nèi)可見(jiàn)光通信網(wǎng)絡(luò)中的多用戶接入和干擾管理技術(shù)　出處：《中國(guó)科學(xué)技術(shù)大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 可見(jiàn)光通信網(wǎng)絡(luò) 多用戶接入 干擾管理 光干擾對(duì)齊 非正交多址接入技術(shù)

【摘要】：固態(tài)照明器件LED的快速發(fā)展給室內(nèi)照明帶來(lái)了深刻變革,在極高的發(fā)光效率之外,其能夠進(jìn)行快速光強(qiáng)切換的特性為信息調(diào)制創(chuàng)造了條件,由此產(chǎn)生了可見(jiàn)光通信技術(shù)。相對(duì)于射頻通信面臨日益緊缺的頻譜資源,可見(jiàn)光通信技術(shù)具有頻譜豐富且無(wú)需授權(quán),通信保密性高,電磁兼容性好,布設(shè)靈活方便等一系列優(yōu)勢(shì),并被第五代移動(dòng)通信技術(shù)列為備選接入手段,其研究正由點(diǎn)對(duì)點(diǎn)鏈路向組網(wǎng)應(yīng)用深化。在可見(jiàn)光通信網(wǎng)絡(luò)中,由于光的傳播特性和用戶視場(chǎng)角約束,小區(qū)需要密集分布以保證用戶移動(dòng)時(shí)服務(wù)的連續(xù)性,這對(duì)多用戶接入機(jī)制的效率提出了較高要求。另外,位于小區(qū)間交疊區(qū)域的用戶同時(shí)接收多個(gè)接入點(diǎn)的視距傳播信號(hào),給用戶解調(diào)帶來(lái)了困難,因此需要制定相應(yīng)的干擾管理策略。本論文圍繞室內(nèi)可見(jiàn)光通信網(wǎng)絡(luò)中的多用戶接入和干擾管理技術(shù)展開(kāi)研究。論文首先總結(jié)了收發(fā)端器件特性,并對(duì)室內(nèi)可見(jiàn)光多徑傳輸信道進(jìn)行建模,給出了蒙特卡洛仿真結(jié)果,列舉并分析了常見(jiàn)的信號(hào)調(diào)制和多用戶接入方式。然后提出了光干擾對(duì)齊的理論方法,并為2 × 2室內(nèi)可見(jiàn)光通信網(wǎng)絡(luò)設(shè)計(jì)了具體的預(yù)編碼方法,在此基礎(chǔ)上形成的通信算法可以依據(jù)用戶誤碼率目標(biāo)動(dòng)態(tài)調(diào)節(jié)編碼參數(shù)。仿真結(jié)果顯示,光干擾對(duì)齊技術(shù)與隨機(jī)預(yù)編碼相比誤碼率顯著下降。最后設(shè)計(jì)了采用非正交多址接入技術(shù)的室內(nèi)可見(jiàn)光通信網(wǎng)絡(luò)架構(gòu),提出了基于位置的多用戶接入方案,通過(guò)合理的用戶分組避免小區(qū)間干擾。針對(duì)小區(qū)內(nèi)用戶非正交接入時(shí)的功率分配問(wèn)題,以用戶通信容量加和或用戶通信容量最小值為目標(biāo),在用戶服務(wù)質(zhì)量保證約束下構(gòu)建相應(yīng)的優(yōu)化問(wèn)題。由于優(yōu)化問(wèn)題的非凸性,采用梯度-映射算法迭代求解,并特別地采用近似變換消除最小值目標(biāo)函數(shù)的不可微性�？紤]到用戶移動(dòng)時(shí)信道估計(jì)可能發(fā)生誤差,干擾對(duì)消過(guò)程的殘差被引入到建模過(guò)程中。仿真結(jié)果表明,采用小區(qū)頻率復(fù)用因子為2的多用戶分組接入機(jī)制能夠有效避免小區(qū)間干擾,而且非正價(jià)多址接入方式較正交接入方式對(duì)用戶通信容量有明顯的提升作用,雖然一定限度的干擾對(duì)消殘差會(huì)削弱用戶通信容量。
[Abstract]:The rapid development of solid-state lighting device (LED) has brought profound changes to indoor lighting. In addition to the extremely high luminous efficiency, the characteristics of fast intensity switching create conditions for information modulation. As a result, visible light communication technology. Compared with radio frequency communication is facing increasing shortage of spectrum resources, visible light communication technology has rich spectrum and no authorization, high communication confidentiality, good electromagnetic compatibility. A series of advantages, such as flexibility and convenience, are listed as alternative access means by the fifth generation mobile communication technology. The research is being deepened from point-to-point link to networking application in visible light communication networks. Due to the propagation characteristics of light and the constraints of the user's field of view, the cell needs to be densely distributed to ensure the continuity of service when the user is moving, which puts forward a higher requirement for the efficiency of the multi-user access mechanism. At the same time, the users who are located in the overlapping area of the cells receive the sight range propagation signals of multiple access points, which makes it difficult for the users to demodulate. Therefore, it is necessary to formulate the corresponding interference management strategy. This paper focuses on the research of multi-user access and interference management technology in indoor visible light communication network. Firstly, the characteristics of transceiver devices are summarized. The indoor visible light multi-path transmission channel is modeled, the Monte Carlo simulation results are given, the common signal modulation and multi-user access methods are listed and analyzed, and the theoretical method of optical interference alignment is proposed. A specific precoding method is designed for 2 脳 2 indoor visible light communication network. Based on this, the coding parameters can be dynamically adjusted according to the BER target. Compared with random precoding, the BER of optical interference alignment technology is significantly reduced. Finally, the indoor visible light communication network architecture using non-orthogonal multiple access technology is designed, and a location-based multi-user access scheme is proposed. In order to avoid inter-cell interference through reasonable user packet, aiming at the problem of power allocation for non-orthogonal access of users in the cell, the goal is to add the sum of the user's communication capacity or minimize the user's communication capacity. Due to the non-convexity of the optimization problem, the gradient mapping algorithm is used to solve the optimization problem iteratively. In particular, approximate transformation is used to eliminate the nondifferentiability of the minimum objective function. Considering that the channel estimation error may occur when the user is moving, the residual error of the interference cancellation process is introduced into the modeling process. The simulation results show that. Using the cell frequency multiplexing factor of 2 multi-user packet access mechanism can effectively avoid inter-cell interference, and the non-positive multiple access mode can obviously enhance the user communication capacity compared with the orthogonal access mode. Although a certain amount of interference cancellation residuals can weaken the user's communication capacity.
【學(xué)位授予單位】：中國(guó)科學(xué)技術(shù)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TN929.1

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 ;安捷倫科技光通信網(wǎng)絡(luò)安裝和維護(hù)平臺(tái)為服務(wù)供應(yīng)商節(jié)約時(shí)間和資金[J];國(guó)外電子測(cè)量技術(shù);2002年02期

2 金建棟;唐棣芳;;構(gòu)建城市光通信網(wǎng)絡(luò)的效益型發(fā)展模式[J];電子技術(shù);2013年08期

3 柴振榮;光通信網(wǎng)絡(luò)[J];管理科學(xué)文摘;1996年01期

4 ;低成本建設(shè)面向未來(lái)的智能光通信網(wǎng)絡(luò)[J];電信科學(xué);2002年06期

5 蔡杰;;淺議如何組建光通信網(wǎng)絡(luò)[J];科技風(fēng);2009年11期

6 于凌玲;;光通信網(wǎng)絡(luò)技術(shù)的發(fā)展研究[J];中國(guó)新通信;2013年23期

7 李建梁;;光通信網(wǎng)絡(luò)技術(shù)發(fā)展趨勢(shì)與前景規(guī)劃[J];中國(guó)新通信;2014年06期

8 劉軒;光通信網(wǎng)絡(luò)的相關(guān)技術(shù)[J];微計(jì)算機(jī)信息;2005年23期

9 賴穎生;;光頻域反射在光通信網(wǎng)絡(luò)檢測(cè)中應(yīng)用研究[J];硅谷;2012年14期

10 ;貝爾實(shí)驗(yàn)室最新試驗(yàn)成果助力未來(lái)光通信網(wǎng)絡(luò)技術(shù)發(fā)展[J];電信技術(shù);2013年03期

相關(guān)會(huì)議論文 前2條

1 ;光通信發(fā)展大走勢(shì)[A];四川省通信學(xué)會(huì)2006年學(xué)術(shù)年會(huì)論文集（二）[C];2006年

2 樊鶴紅;葛晨暉;韋樸;趙俊;孫小菡;;光通信網(wǎng)絡(luò)可靠性評(píng)估模型及應(yīng)用[A];全國(guó)第十三次光纖通信暨第十四屆集成光學(xué)學(xué)術(shù)會(huì)議論文集[C];2007年

相關(guān)重要報(bào)紙文章 前10條

1 本報(bào)記者 韓霽;光通信網(wǎng)絡(luò)：與世界前沿同步[N];經(jīng)濟(jì)日?qǐng)?bào);2012年

2 ;2008年臺(tái)灣光通信元件產(chǎn)值將達(dá)400億元新臺(tái)幣[N];中國(guó)電子報(bào);2003年

3 本報(bào)記者 張美意;光維通信：深耕光網(wǎng)市場(chǎng)[N];通信產(chǎn)業(yè)報(bào);2011年

4 張雁　劉陽(yáng);陜西電力智能光通信網(wǎng)絡(luò)初具規(guī)模[N];國(guó)家電網(wǎng)報(bào);2010年

5 ;華南崛起光器件制造業(yè)[N];人民郵電;2001年

6 ;40G光通信市場(chǎng)何時(shí)啟動(dòng)[N];網(wǎng)絡(luò)世界;2001年

7 王霜娥　沈宗毅;福建公司首個(gè)智能光通信網(wǎng)絡(luò)投運(yùn)[N];國(guó)家電網(wǎng)報(bào);2009年

8 孫;Optical Access光產(chǎn)品容量大[N];中國(guó)計(jì)算機(jī)報(bào);2000年

9 辛文;我國(guó)光通信實(shí)現(xiàn)240Gbit/s實(shí)時(shí)傳輸[N];中國(guó)航空?qǐng)?bào);2011年

10 吳t瑛;中國(guó)石油專用通信網(wǎng)第一條光通信保護(hù)環(huán)日前開(kāi)通[N];中國(guó)石油報(bào);2007年

相關(guān)博士學(xué)位論文 前3條

1 王留軍;量子密鑰分發(fā)與經(jīng)典光通信融合的實(shí)驗(yàn)研究[D];中國(guó)科學(xué)技術(shù)大學(xué);2016年

2 吳冰冰;基于有源半導(dǎo)體非線性器件的全光通信網(wǎng)絡(luò)關(guān)鍵技術(shù)研究[D];北京郵電大學(xué);2012年

3 孫力;光通信網(wǎng)絡(luò)若干基礎(chǔ)問(wèn)題的研究[D];廈門大學(xué);2008年

相關(guān)碩士學(xué)位論文 前4條

1 劉霞;室內(nèi)可見(jiàn)光通信網(wǎng)絡(luò)MAC層接入機(jī)制研究[D];華中科技大學(xué);2015年

2 張曉珂;室內(nèi)可見(jiàn)光通信網(wǎng)絡(luò)中的多用戶接入和干擾管理技術(shù)[D];中國(guó)科學(xué)技術(shù)大學(xué);2017年

3 李劍飛;分布式光通信網(wǎng)絡(luò)環(huán)境下能耗技術(shù)研究[D];北京郵電大學(xué);2013年

4 方展航;全光通信網(wǎng)絡(luò)中可編程光插分復(fù)用器POADM系統(tǒng)的研制[D];電子科技大學(xué);2012年

，

本文編號(hào)：1440751