项目名称: 交通专用短程通信系统的关键技术及VLSI设计方法的研究
项目编号: No.61201244
项目类型: 青年科学基金项目
立项/批准年度: 2013
项目学科: 电子学与信息系统
项目作者: 金婕
作者单位: 上海工程技术大学
项目金额: 25万元
中文摘要: 智能交通系统是物联网在交通领域的应用,本课题针对基于IEEE 802.11p的交通专用短程通信系统在高速移动中难以解决的高速时变信道建模、OFDM接收机核心算法及VLSI设计等问题进行研究。在信道建模方面,拟采用马尔科夫过程描述信道的非静止特性,通过实际的路测完成高速移动中车车通信的信道数据采集,提取并研究均方根时延扩展、均方根多普勒频移扩展等参数对于准确的高速信道建模的作用;在OFDM接收机核心算法方面,针对多普勒频移和快速时间选择性衰落的影响,拟利用IEEE 802.11p的长、短前导码的性质,结合自适应调整滑动窗口位置的方法,进行时间同步算法的研究;拟采用基于判决反馈和基扩展模型的迭代式信道估计和ICI消除算法,并对迭代的次数、软判决或硬判决、基于哪种基扩展可以取得最佳的接收机性能进行研究;在VLSI设计方面,拟研究OFDM接收机核心算法的软硬件划分和其硬件的VLSI优化设计方法。
中文关键词: 智能交通系统;基扩展模型;正交频分复用;迭代算法;快速时变衰落
英文摘要: Intelligent Transport System is the application of the internet of things in the field of transportation.The project aims at solving the challenging problems in high mobility environment, fast time-varying channel modeling, core algorithms of OFDM receiver, optimized VLSI design and so on.The project proposes that using Markov process to describe the unstationary of mobile channel,carrying out field trials to measure the mobile channel based on all kinds of scenarios, extracting root mean square(RMS) delay spread and RMS doppler spread and so on to establish channel model. The project makes use of the proporties of short and long preambles in IEEE 802.11p, combined with adaptive adjustment of the sliding window position, to realize the accurate time synchronizaiton.The project focuses on iterative channel estimation and ICI reduction algorithms based on decision feedback and basis expansion model and studies the problems such that the iterative numbers、soft or hard decision feedback and which of basis expansion models could contribute to the optimal receiver.The project also studies the optimal design of VLSI implementation of the core algorithms in orthogonal frequency division multiplex(OFDM) system.
英文关键词: Intelligent Transport Systems;Basis Expansion Model;Orthogonal Frequency Division Multiplex;Iterative Algorithm;Fast Time-Varying Fading