第2讲 FTN传输系统概述  

Overview of Faster-Than-Nyquist Transmission System

作　　者：郭明喜[1] 魏以民[1] 沈越泓[1] 高媛媛[1] 郭继斌[1] 

机构地区：[1]解放军理工大学通信工程学院,江苏南京210007

出　　处：《军事通信技术》2014年第4期84-89,共6页Journal of Military Communications Technology

基　　金：国家自然科学基金资助项目(61301157)

摘　　要：超过奈奎斯特码元速率传输时,会引起码间串扰(ISI),传统理论认为这必然导致通信系统性能下降。然而马佐(Mazo)等人提出的超奈奎斯特(FTN)传输系统却突破了这一限制,只要传输速率超过奈奎斯特速率在一定范围内,尽管存在ISI,但信号最小欧氏距离没有变化,误码性能不受影响。文章从FTN的基本思想出发,介绍了FTN传输的概念,分析了系统的Mazo限和信道容量,结合数值仿真结果说明了FTN系统的优势和潜力,并给出了FTN系统模型,重点阐述了FTN接收端的检测思路和方法。Inter-Symbol Interference（ISI） is caused when Faster-Than-Nyquist（FTN） signaling is applied, and it degrades the system performance according to the traditional communication theory. However, FTN transmission system proposed by Mazo has broken this theory limit. He holds that system performance will not be degraded as long as the transmission rate is faster than the Nyquist rate within a certain extent, because the minimum euclidean distance does not changed though ISI exists. In this paper, the basic concept of FTN transmission system was introduced, the Mazo limit and system capacity also analyzed, and its superiority and potential shown by numerical simulation results. The system model of FTN transmission system was proposed, with the receive detection idea and methods especially emphasized.

关 键 词：超奈奎斯特速率 最小欧氏距离 马佐限 系统容量 

分 类 号：TN911[电子电信—通信与信息系统]