通信学报2017，Vol.38Issue(9)：46-54,9.DOI:10.11959/j.issn.1000-436x.2017182
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
DFT-SV-OFDM based adaptive multi-rate DFT scrambling vector code division multiple access
摘要
Abstract
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 adap-tive 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 para-meters 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 chan-nels. Moreover, it can satisfy the requirement of frame length under certain channel utilization by adjusting the parame-ters.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Key words
OFDM/V-OFDM/MC-DS-CDMA/MC-CDMA分类
信息技术与安全科学引用本文复制引用
周杲,范平志,郝莉..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[J].通信学报,2017,38(9):46-54,9.基金项目
国家自然科学基金资助项目(No.61032002, No.60872014) （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) The National Natural Science Foundation of China (No.61032002, No.60872014), The Innovative Intelligence Base of the Disciplines of Universities (111 Program) (No.111-2-14) （"111"计划）
