A Study Of Faster-than-Nyquist Signaling Transmitting Methods

Nowadays, with the pursuing of higher spectral efficiency, Faster-than-Nyquist Signaling(simplified as FTN Signaling), which is first proposed by Mazo in 1975, regained the attention of people. FTN technology through initially introducing the intersymbol interference gains higher spectral efficiency, while the more detection complexity caused by which is too high to ignore.As one of the crucial technologies in 5G, FTN technology, which has good performance, is with no doubt a popular direction in telecommunication's development. Nevertheless, for FTN system, we cannot use the traditional methods to detect the transmitted signals, because of the colored noise and the strongly intersymbol interference introduced by FTN technology. Hence, people are keeping searching a good detect method for FTN system, while the methods we have found are still not good enough. So, we introduced the history of FTN technology development and theoretically analyzed the features of FTN system with both single-carrier and multi-carriers afterwards. We also analyzed two simplified methods for detecting FTN signal, and proposed the advanced methods based on its properties individually. For the FTN detection method based on Turbo equalization we offered an advanced algorithm with less complexity; And for the FTN detection method with multi-layer structure and non-uniform power allocation, we proposed a novel method allowing to flexibly choose different ways of coding but via the same structure still. We proved the practicability of the advanced methods through computer simulation, and fully analyzed the difference between them and the original ones. In the end we summarized the possible development directions of FTN technology and discussed several problems it may encounter.