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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。
When it exceeds Nyquist symbol rate transmission, it will cause intersymbol interference (ISI). According to the traditional theory, this will inevitably lead to the degradation of communication system performance. However, the super-Nyquist (FTN) transmission system proposed by Mazo et al. Breaks this limitation, and as long as the transmission rate exceeds the Nyquist rate within a certain range, the signal minimum Euclidean distance, despite the ISI, No change in distance, error performance is not affected. Based on the basic idea of FTN, this paper introduces the concept of FTN transmission and analyzes the Mazo limit and channel capacity of the system. The numerical simulation results show the advantages and potential of the FTN system. The FTN system model is also given, and the FTN Receiving end of the test ideas and methods.