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&&&浏览历史上传用户：ggxgupasol资料价格：5财富值&&『』文档下载 ：『』&&『』学位专业：&关 键 词 ：&&&&&权力声明：若本站收录的文献无意侵犯了您的著作版权，请点击。摘要:（摘要内容经过系统自动伪原创处理以避免复制，下载原文正常，内容请直接查看目录。）跟着最近几年来无线通讯中的挪动德律风、数据、图象、多媒体、互联网运用等营业的赓续成长,请求无线通讯体系能在庞杂情况下供给更高的传输速度,并具有更高的靠得住性,是以抗多径式微技巧一向是经久不衰的研讨热门。本文以块传输体系为研讨对象,环绕其频带效力与其在多径式微信道中的传输机能停止了深刻研讨,重要进献归纳综合为以下几个方面1.提出了一种块传输体系的多半据块结合调制算法。经由过程深刻剖析准正交时分复用(QOTDM)体系的频谱构造以后,提出了一种改良的QOTDM体系计划,并提出了一种适于该体系的高机能盲平衡算法。在此基本上,针对若何减小单载波块传输与正交频分复用体系中轮回前缀占用体系开支的成绩,提出了一种基于QOTDM的多半据块结合调制算法;应用多个数据块共用一个轮回前缀,有用下降了体系冗余,进步了体系的频带效力,并且结合调制的数据块在吸收机分化后,互相之间不发生搅扰。块调制算法不只可用于单载波块传输与正交频分复用体系,也可运用于采取这二者传输技巧的超宽带和MIMO等体系。实际剖析和仿真成果证实,该算法在慢式微信道前提下与已有算法比拟机能完整没有丧失,而频带效力显著进步。2.提出一种新鲜的适于二径式微信道运用的双向判决判决反应平衡器。这类平衡算法经由过程对带有判决反应构造的时光正向、逆向无穷冲激呼应(IIR)平衡器的输入判决量停止最年夜比归并而取得分集增益,使误码特征改良。该归并进程采取线性庞杂度的处置,而不是像已有的双向判决判决反应平衡器那样的高庞杂度,由于后者须要在终究判决进程中逐一符号采取加窗最年夜似然序列估量算法。仿真成果注解,所提算法不管是最小照样非最小相位体系信道前提下都能跨越已有的双向判决反应IIR平衡器的机能。3.针对单载波块传输体系的时、频域平衡器在不采取信道编码的情形下没法取得多径分集增益的缺陷,提出了一种可运用于非扩频的单载波块传输体系的RAKE吸收算法。这类RAKE吸收机是经由过程平衡重视构各个多径旌旗灯号重量,再联合多级搅扰抵消取得多径分集增益的,能显著改良误码机能。实际剖析和仿真成果注解,所提出的算法可以或许与惯例单载波平衡器相联合显著改良检测机能,并且可推行到与其它多种罕见平衡算法相联合应用。4.提出多天线非扩频通讯体系的搅扰抵消与空时二维RAKE吸收机计划。商量了二发一收MIMO体系中单载波频域平衡算法的道理,针对今朝对该算法的研讨仅限于两个发射天线的情形,将它推行运用到具有四个发射天线的体系。提出了该体系的搅扰抵消检测计划,与单载波传输体系相似,该MIMO体系中的搅扰抵消技巧也能改良初始平衡器的检测机能。然落后一步提出该体系的空时二维RAKE分集吸收计划,将吸收旌旗灯号中的各条多径重量分化后分离停止空时分组码的空时归并,然后再停止多径分聚集并,在取得空时分组码供给的空间分集增益基本上,进一步获得多径的分集增益。另外,在非扩频的多用户MIMO通讯体系中完成了空时二维RAKE吸收;当各用户信息从吸收旌旗灯号平分解后,分离自力停止空时二维分聚集并,取得空间与多径的分集增益。仿真成果注解,所提出的几种算法都可以优越任务。Abstract:Followed in recent years wireless communication mobile German law wind, data, image, multimedia, the application of Internet business develops ceaselessly, the request of wireless communication system in complex supply more high transmission speed, and has a higher reliability, anti multipath type micro skills has been enduring research hot. The block transmission system as the object of study around the band effect and in multipath fading channel transfer function to stop the profound research and important offer induction integrated into the following aspects 1. This paper puts forward a block transmission system mostly according to block according to the modulation algorithm. After a deep analysis of the spectrum structure of quasi orthogonal time division multiplexing (QOTDM) system, a modified QOTDM scheme is proposed, and a high performance blind balancing algorithm is proposed. On this basic, aiming at how to reduce single carrier block transmission and orthogonal frequency division multiplexing system in circular prefix occupied spending system performance is proposed based on QOTDM mostly according to block according to the
application of a plurality of data blocks share a cycle prefix, useful to decrease the system redundancy, improving the frequency band of the system efficiency, and according to the modulation of data blocks in absorption machine differentiation, between each other without interference. Block modulation algorithm not only can be used for single carrier block transmission and orthogonal frequency division multiplexing system, but also can be used to take the two transmission techniques of ultra wideband and MIMO and other systems. The actual analysis and simulation results show that the algorithm has no loss in the slow fading channel compared with the existing algorithms, and the frequency band efficiency is significantly improved. 2 proposed a fresh two micro channel size for use of bidirectional decision response equalizer. This kind of balancing algorithm through a decision response to tectonic time forward and reverse infinite impulse echo (IIR) balancer input decision to stop the biggest than merge and obtain diversity gain, the improvement of bit error characteristics. The merge process take linear complexity of disposal, and not like the existing bidirectional decision response to judgment balancer as high complexity because of the need to be in eventually decision process in each symbol take plus window the maximum likelihood sequence estimation algorithm. Notes to simulation results, the proposed algorithm regardless of the function of the minimum still non minimum phase system channel conditions can across the existing bidirectional response to judgment IIR equalizer. 3. For single carrier block transmission system, frequency domain equalizer in do not take channel coding can't obtain the defects of the multipath diversity gain proposed a absorption algorithm for non spread spectrum of the single carrier block transmission system of the rake. This kind of rake absorption machine is through the process of balance attention each multipath signal weight structure, combined multistage interference cancellation made multipath diversity gain of, can significantly improve the bit error rate (BER) performance. Theory analysis and simulation results of the annotation, the proposed algorithm can perhaps and practice single carrier balancer combination significantly improving the performance of detection, and can be pushed to and many other rare balance algorithm combined application. Trouble cancellation and space-time RAKE absorption machine plan 4 proposed multi antenna non spread spectrum communication system. To discuss the two issued a single carrier frequency domain balanced algorithm in MIMO system, for the present study of the algorithm is limited to the case of two transmit antennas, it is applied to a system with four transmit antennas. The system interference cancellation detection scheme is proposed that similar and single carrier transmission system, the MIMO system interference cancellation techniques can also be improved initial balancer detection performance. Ran behind the proposed the system of empty 2D RAKE diversity absorption scheme, the absorption signal in multipath weight differentiation after separation stop space-time block codes merge, then stop multipath clustering and, in obtain space-time block code supply spatial diversity gain, gain further multipath diversity gain. Also in the non spread spectrum multiuser MIMO communication system completed the space- when the user information from absorption flags, divide the solution after separation independent empty two-dimensional clustering and space and multipath diversity gains. Simulation results, the proposed algorithm can be superior to the task.目录:摘要5-7Abstract7-8第一章 绪论12-22&&&&1.1 研究背景12-14&&&&1.2 研究现状14-19&&&&&&&&1.2.1 降低CP 的传输14-15&&&&&&&&1.2.2 均衡技术15-18&&&&&&&&1.2.3 MIMO 技术18-19&&&&1.3 本文的主要创新点19-22第二章 无线信道的基本理论以及均衡技术22-32&&&&2.1 无线信道的传播22-23&&&&&&&&2.1.1 大尺度衰落22-23&&&&&&&&2.1.2 小尺度衰落23&&&&2.2 多径衰落信道的参数23-25&&&&&&&&2.2.1 多径衰落信道的数学模型23-24&&&&&&&&2.2.2 时间色散参数24-25&&&&&&&&2.2.3 多普勒功率谱色散参数25&&&&2.3 多径信道的概率统计模型25-26&&&&2.4 均衡技术26-31&&&&&&&&2.4.1 信号模型26-27&&&&&&&&2.4.2 MLSE 检测器及其Viterbi 实现算法27-28&&&&&&&&2.4.3 时域线性均衡器28-29&&&&&&&&2.4.4 频域均衡器29-30&&&&&&&&2.4.5 IIR 均衡器30-31&&&&2.5 本章小结31-32第三章 基于QOTDM 系统的块调制算法32-52&&&&3.1 QOTDM 技术概述32-33&&&&3.2 基于QOTDM 系统的盲均衡算法33-37&&&&&&&&3.2.1 盲均衡算法简介33-34&&&&&&&&3.2.2 新的QOTDM 系统及其盲均衡接收机34-36&&&&&&&&3.2.3 性能仿真及分析36-37&&&&3.3 基于QOTDM 系统的块调制算法37-47&&&&&&&&3.3.1 研究背景37-38&&&&&&&&3.3.2 块调制算法38-43&&&&&&&&3.3.3 BM 单载波块传输系统的局部MLSE 检测43-46&&&&&&&&3.3.4 性能仿真及分析46-47&&&&3.4 MIMO-OFDM 系统的块调制算法47-51&&&&&&&&3.4.1 MIMO-OFDM 系统47-48&&&&&&&&3.4.2 BM-MIMO-OFDM 系统48-50&&&&&&&&3.4.3 性能仿真及分析50-51&&&&3.5 本章小结51-52第四章 多径信道的高效 BAD 均衡器52-62&&&&4.1 引言52-53&&&&4.2 BAD 均衡器53-54&&&&4.3 二径衰落信道中的BAD 均衡器54-58&&&&&&&&4.3.1 DF-IIR 均衡器55&&&&&&&&4.3.2 DF-TR-IIR 均衡器55-56&&&&&&&&4.3.3 BAD 均衡器56-58&&&&4.4 性能仿真及分析58-60&&&&4.5 本章小结60-62第五章 单载波块传输系统的分集接收62-78&&&&5.1 SC-FDE 的多径分集增益62-64&&&&5.2 干扰抵消均衡64-70&&&&&&&&5.2.1 时域处理64-66&&&&&&&&5.2.2 频域处理66-67&&&&&&&&5.2.3 性能仿真及分析67-70&&&&5.3 多径分集接收70-76&&&&&&&&5.3.1 RAKE 接收技术70-71&&&&&&&&5.3.2 时域处理71-73&&&&&&&&5.3.3 频域处理73-74&&&&&&&&5.3.4 性能仿真及分析74-76&&&&5.4 本章小结76-78第六章 STBC 块传输系统的分集接收78-98&&&&6.1 结合STBC 的单载波块传输系统78-83&&&&&&&&6.1.1 两个发射天线的情况78-79&&&&&&&&6.1.2 四个发射天线的STBC-SC-FDE 算法79-81&&&&&&&&6.1.3 性能仿真及分析81-83&&&&6.2 Rician 信道下STBC 块传输系统的干扰抵消算法83-86&&&&&&&&6.2.1 时域处理83-84&&&&&&&&6.2.2 频域处理84-86&&&&&&&&6.2.3 性能仿真及分析86&&&&6.3 STBC 块传输系统的空时2D-RAKE 接收86-92&&&&&&&&6.3.1 时域处理87-88&&&&&&&&6.3.2 频域处理88-90&&&&&&&&6.3.3 性能仿真及分析90-92&&&&6.4 多用户STBC 块传输系统的多径分集接收92-97&&&&&&&&6.4.1 多用户STBC 单载波块传输系统92-93&&&&&&&&6.4.2 多用户STBC 系统的频域2D-RAKE 接收93-96&&&&&&&&6.4.3 性能仿真及分析96-97&&&&6.5 本章小结97-98第七章 总结与展望98-100&&&&7.1 工作总结98&&&&7.2 工作展望98-100致谢100-102参考文献102-112攻读博士期间所取得的研究成果112-114分享到：相关文献|(window.slotbydup=window.slotbydup || []).push({
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