【摘 要】
：
In asynchronous Multiple-Input-Multiple-Output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) over the selective Rayleigh fading channel,the performance
【机 构】
：
National Key Laboratory of Science and Technology on Communications
【基金项目】
：
the Hi-Tech Research and Development Program of China;the Fundamental Research Funds for the Central Universities;the Funds;国家自然科学基金
论文部分内容阅读
In asynchronous Multiple-Input-Multiple-Output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) over the selective Rayleigh fading channel,the performance of the existing linear detection algorithms improves slowly as the Signal Noise Ratio (SNR) increases.To improve the performance of asynchronous MIMO-OFDM,a low complexity iteratire detection algorithm based on linear precoding is proposed in this paper.At the transmitter,the transmitted signals are spread by precoding matrix to achieve the space-frequency diversity gain,and low complexity iterative Interference Cancellation(IC) algorithm is used at the receiver,which relieves the error propagation by the precoding matrix The performance improvement is verified by simulations.Under the condition of 4 transmitting antennas and 4 receiving antennas at the BER of 10-4,about 6 dB gain is obtained by using our proposed algorithm compared with traditional algorithm.
其他文献
基于主题文本的建构学习包括主题生成和主题学习,是模式两大主要教学环节,具有围绕主题文本展示学习、强调主题阅读是意义建构的基础、注重主题阅读与主题探究的关联意义、学
共同体是一个备受关注的话题.本文从教育共同体现实的角度,描述了其内涵与分类,厘清了各种教育共同体的关系；从区域教育共同体的实践形态的角度,考察、分析和概括了县域和超县
徐蓉娟教授出身中医世家,是上海中医药大学附属龙华医院内科教授、博士研究生导师、主任医师,内分泌代谢科创办人和学科带头人,擅长以中医为主,中西医结合诊治各种内分泌代谢
对“异地高考”政策合理性的认识,通常基于“公平”“贡献”“发展”三种立场。“公平”立场强调异地高考的补偿价值,但缺乏对“处境不利”本身及其根源的辨析;“贡献”立场
我国异地高考最深层的阻碍因素,是既得利益者自我权利定位和高校财政支撑体系下政府与高校缔结的利益结构被固化。打破现有的高校财政扶持体制、增强现代法治理念、建立第三
我国高校自主招生与改革的初衷渐行渐远,成为名校的“掐尖”游戏.通过对英、美、日高校自主招生方式和共同特点的分析,并对三国“统一高考在前,自主招生在后”招生程序的描述
基于利科尔的“文本中心论”诠释学思想,就高考语文阅读出现的一种“奇特”现象进行解读,提出高考语文阅读应当回归“文本”自身,不应设定“标准答案”.考生的解答只要“切合
目的 对儿童孤独症发病的高危因素进行初步探讨.方法 选择孤独症患儿278例及健康对照儿童200例,采用自制调查表记录一般人口学资料及产前、产时和婴幼儿期的生长发育资料,并
To study the influence of ethanol molecules on the melittin tetramer folding,we investigated the dewetting transition of the melittin tetramer immersed in pure
A cross-layer design which combines adaptive modulation and coding (AMC) at the physical layer with a hybrid automatic repeat request (HARQ) protocol at the dat