Comparison of time frequency offset robustness of EGF prototype filter in OFDM/OQAM system

摘要

As a multi-carrier system, the OFDM/OQAM system is sensitive to the synchronization error of the system. As an important part of the system, the robustness of the prototype filter to synchronization error is also very important. This paper first analyzes the influence of synchronization error on the system, and then deduces the expression of the signal to interference ratio (SIR) of the demodulation symbol. After that, the ambiguity function characteristics of extended Gauss function (EGF) prototype filters with three different expansion factors are analyzed. On this basis, the simulation comparison of the time frequency offset (TFO) robustness performance of the three EGF prototype filters with different expansion factors is carried out with the measure of SIR of the demodulation symbol.