残余频偏对重叠复用信号接收性能的影响分析  

Receptivity Analysis of Overlapped Time- Diving Multiplex Signal with Residual Frequency Offset

作　　者：王柯[1] 刘爱军[1] 李智深 

机构地区：[1]解放军理工大学通信工程学院,江苏南京210007 [2]总参信息化部驻济南地区军代表室,山东济南250000

出　　处：《通信技术》2015年第1期27-31,共5页Communications Technology

摘　　要：主要研究AWGN信道下,残余频偏对重叠时分复用(OvTDM)信号接收的性能影响;同传统的QAM技术相比,OvTDM是一种可以获得高频谱效率的传输技术,它通过引入符号码间串扰,并利用符号间互扰的约束特性来实现更高传输速率。在一个实际通信系统中,接收信号不可避免的会受到系统载波频偏的影响,从而影响信号的接收性能。因此,分析了系统残余频偏对OvTDM的性能影响,对比了相同条件下QAM信号性能,研究结果表明,在相同的信噪比和残余频偏条件下,OvTDM信号具有更好的误码性能。This paper mainly discusses the performance of OvTDM （ Overlapped Time Diving Multiplex） signal with residual frequency offset under AWGN （Additive White Gauss Noise） channel. Compared with traditional QVM technology, OvTDM, as a transmission scheme, could obtain high spectral efficiency. By introducing ISI （inter symbol interference） and its constraint characteristics a fairly high transmission rate could be achieved. In a practical application, the transmission system would be inevitably affected by the frequency offset, thus influencing the signal receptivity. In light of this, this paper analyzes the performance of OvTDM with frequency offset and compares the performance of QAM （ Quadrature Amplitude Modulation） under same condition. Research results verify that the performance of OvTDM is better than that of QAM in the same SNR （Signal Noise Ratio）.

关 键 词：重叠时分复用 频偏 信噪比 

分 类 号：TN911.6[电子电信—通信与信息系统]