时间频率二维重叠复用系统及其快速检测算法  

Time-frequency Overlapped Multiplex System and Fast Detection Approach

作　　者：王浩[1] 孙艳华[2] 李道本[1] 

机构地区：[1]北京邮电大学信息工程学院,北京100876 [2]北京工业大学电子信息与控制工程学院,北京100124

出　　处：《北京工业大学学报》2011年第1期53-59,共7页Journal of Beijing University of Technology

基　　金：国家自然科学基金重点项目(90604035)

摘　　要：为了提高通信系统的频谱效率,提出了一种新的时间频率二维重叠复用系统,并在此基础上研究了针对这种通信系统的一种快速检测算法.实验结果表明,与传统的最大似然序列估计检测算法相比,该算法在牺牲部分性能的条件下,使得检测速度得以大幅提高,从而推动了时间频率二维重叠复用系统的实用化进程,而且其性能在较高信噪比时仍然优于相同频谱效率的QAM调制.这说明,采用相互重叠的信号复用传输方式直接提高传输速率比使用同样频谱效率的高阶QAM调制能带来更大的增益.In order to improve spectrum efficiency of communication system, a novel two-dimension Time- frequency Overlapped Multiplex System is proposed, and based on this communication system, a rapid detection algorithm is studied. The experimental results show that compared with the traditional maximum likelihood sequence estimation detection algorithm, the proposed algorithm obtains significant increase in detection speed at the expense of some performance of bit err ratio, so as to promote practical process of the two-dimension Time- frequency Overlapped Multiplex System. Its performance at a high signal to noise ratio is still better than that of the QAM modulation with the same spectrum efficiency. This shows that improving the transmission rate with overlapped signals can achieve greater gains than that of using high-level QAM modulation with the same spectrum efficiency.

关 键 词：频谱效率 调制技术 重叠复用 

分 类 号：TN911.22[电子电信—通信与信息系统]