频率域序列检测的多载波系统  

A Novel Multi-Carrier System Based on Maximum Likelihood Sequence Detection in Frequency Domain

作　　者：王竞[1] 李道本[1] 

机构地区：[1]北京邮电大学信息工程学院,北京100876

出　　处：《北京邮电大学学报》2007年第5期24-27,共4页Journal of Beijing University of Posts and Telecommunications

基　　金：国家自然科学基金重点项目(90604035)

摘　　要：提出了一种新颖的非正交多载波系统——MLSD-MCM,该系统不需循环前缀的保护,频谱效率优于相同调制方式的OFDM系统,信号检测采用了基于Ungerboeck尺度的频率域最大似然序列检测(MLSD).为了降低复杂度,应用了平方根汉宁窗,子载波之间的等效卷积约束长度可近似为2.计算机仿真结果证明,MLSD-MCM系统在移动信道下是有效可行的.A new non-orthogonal multi-carrier system is proposed. The CP-free system shows that its spectrum efficiency is better than that of the orthogonal frequency division multiplexing system with the same modulation. The frequency-domain maximum likelihood sequence detection based on the Ungerboeck metric is employed. In order to decrease the detection complexity, a square-root-Hanning window is adopted. The convolution constraint length among sub-carriers is only 2. The simulation results prove that the proposed system is effective and feasible in mobile channels.

关 键 词：无线通信 非正交频分复用 最大似然序列检测 

分 类 号：TN911.22[电子电信—通信与信息系统]