基于空时块编码和正交脉冲的MIMO系统性能研究

发布时间：2018-01-04 23:19

本文关键词：基于空时块编码和正交脉冲的MIMO系统性能研究　出处：《高技术通讯》2017年03期 　论文类型：期刊论文

【摘要】：为了有效利用脉冲无线电(IR)的短距离、高数据速率以及多输入多输出(MIMO)通信系统的更大容量,提出了一种基于空时块编码(STBC)和正交脉冲的MIMO超宽带(UWB)通信系统。具体实现是通过对标准单输入单输出(SISO)脉冲无线电系统的直接序列超宽带作为多址(MA)技术的IR-MA信号模型以及信道模型、收发器结构和检测方法的分析,提出了一种把空时块编码和正交脉冲相结合的新方法,并采用FS-rake相干接收(CR)和非相干接收(NCR)技术及IEEE UWB信道模型对其获得的空间分集和编码性能进行了研究,从而得到可以相对较好地描述高信噪比时的性能变化趋势的理论上限值。仿真结果表明,这种STBC-IR方案相比于传统的单链路-脉冲无线电(SL-IR)方案,可获得更好的空间分集和编码增益,可用于增加传输距离和减少rake接收机的复杂性,而且在UWB通信中,STBC-IR方案还能很好地消除定时抖动的影响。
[Abstract]:In order to make effective use of impulse radio (IR) short distance, high data rate and multiple input multiple output (MIMO) a large capacity communication system, proposes an encoding based on space-time block (STBC) and orthogonal pulse MIMO ultra wideband (UWB) communication system. The specific implementation is based on the standard single input output (SISO) direct sequence impulse radio ultra wideband systems as multiple access (MA) IR-MA signal model and channel model analysis technology, transceiver structure and detection method, puts forward a new method of space-time block encoding and orthogonal pulse combination, and the use of FS-rake (CR) coherent and non coherent receive (NCR) space diversity and encoding technology and performance of the IEEE UWB channel model is studied, in order to get the theoretical upper limit can describe the performance trend when the SNR is high relatively better value. The simulation results show that this kind of STBC Single link - -IR scheme compared to the traditional impulse radio (SL-IR) scheme can obtain spatial diversity and encoding gain better, can be used to increase the transmission distance and reduce the complexity of the rake receiver, and in UWB communication, the STBC-IR scheme can effectively eliminate the impact of timing jitter.

【作者单位】：西华师范大学计算机学院;西南民族大学计算机科学与技术学院;
【基金】：国家自然科学基金(61379019) 西华师范大学基本科研业务费专项资金(14C002) 南充市科技支撑(15A0068)资助项目
【分类号】：TN919.3
【正文快照】： 0引言随着无线通信技术的发展,高速、可靠的无线传输技术得到了广泛研究,从单输入单输出(single-in-put single-output,SISO)的单链路(single link,SL)系统发展到多输入多输出(multiple-input multiple-out-put,MIMO)[1]系统。MIMO系统通过采用多个发射和多个接收天线,信号通

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