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基于DFT-SV-OFDM的自适应多速率DFT加扰矢量码分多址系统研究
  • ISSN号：1000-436X
  • 期刊名称：《通信学报》
  • 时间：0
  • 分类：TN[电子电信]
  • 作者机构：[1]西南交通大学信息科学与技术学院信息编码与传输四川省重点实验室,四川成都610031
  • 相关基金：国家自然科学基金资助项目(No.61032002,No.60872014);高校学科创新引智计划(“111”计划)基金资助项目(No.111-2-14)
作者： 周杲[1], 范平志[1], 郝莉[1]
关键词： 正交频分复用, 矢量正交频分复用, 多载波直接序列码分多址, 多载波码分多址, OFDM, V-OFDM, MC-DS-CDMA, MC-CDMA
中文摘要：

为解决多速率多载波扩频多址系统存在的信道衰落条件下性能下降以及频谱效率相对较低的问题，利用矩阵置换原理和r循环信道矩阵的分解特性，提出一种自适应多速率DFT加扰矢量多载波码分多址接入（AMR-DFT-VMC-CDMA）系统模型。在理论分析的基础上，综合考虑一定信道利用率条件下，信道误码率与发送信号帧长的相互制约关系，提出自适应参数调整算法以确保足够长的传输帧长。仿真结果表明，该系统在衰落信道下相比传统的多速率多载波扩频系统具有更好的性能，且通过调整参数，既满足了一定信道利用率下对帧长的要求，保证了频谱效率提高，又可以灵活完成多速率多用户的信息传输。

英文摘要：

Multipath interference would degrade the performance of multi-rate systems based on OFDM and CDMA,which spectrum efficiency was also lower relatively.To improve the performance and spectrum efficiency,a novel adaptive multi-rate DFT scrambling vector multi-carrier CDMA(AMR-DFT-VMC-CDMA)was proposed based on the theory of matrix permutation and r-cyclical matrix decomposition characteristics.Meanwhile,by theoretical analysis,the parameters of the system could be adaptively adjusted to ensure frame length long enough to break the restriction between channel bit error rate and data frame length on a certain channel utilization condition.The simulation results show that compared with the traditional multi-rate,multi-subcarrier and spreading system,the new system could achieve multi-rate and multi-user information transmission flexibly with better performance and better spectrum efficiency in fading channels.Moreover,it can satisfy the requirement of frame length under certain channel utilization by adjusting the parameters.

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期刊信息
  • 《通信学报》
  • 中国科技核心期刊
  • 主管单位:中国科学技术协会
  • 主办单位:中国通信学会
  • 主编：杨义先
  • 地址：北京市丰台区成寿寺4路11号邮电出版大厦8层
  • 邮编：100078
  • 邮箱：
  • 电话：010-81055478 81055481
  • 国际标准刊号：ISSN：1000-436X
  • 国内统一刊号：ISSN：11-2102/TN
  • 邮发代号:2-676
  • 获奖情况:
  • 信息产业部通信科技期刊优秀期刊二等奖
  • 国内外数据库收录:
  • 荷兰文摘与引文数据库,美国工程索引,美国剑桥科学文摘,英国科学文摘数据库,日本日本科学技术振兴机构数据库,中国中国科技核心期刊,中国北大核心期刊（2004版）,中国北大核心期刊（2008版）,中国北大核心期刊（2011版）,中国北大核心期刊（2014版）,中国北大核心期刊（2000版）
  • 被引量:25019