论文标题
删除Nyquist滤波器ISI的辅助因素方法
Auxiliary Factor Method to Remove ISI of Nyquist Filters
论文作者
论文摘要
众所周知，Nyquist的第一条件有望在频域中衍生的隔膜间干扰（ISI）。但是，使用FIR滤波器的实际实现会截断傅立叶的窗口转换，并防止数学计算在零ISI处达到理想的解决方案。为了获得更好的结果，通常需要增加窗口的长度。为了解决这个问题，通过使用辅助因素（AFS）来补偿截短的傅立叶变换的缺点，并完全删除ISI，而不论窗口的长度如何，就提出了一种新的方法。此外，在定时抖动存在下的性能也得到了显着提高。得出了AFS的封闭式解，并通过模拟结果确认了有效性。最后，分析了传输延迟和其他计算复杂性的问题。
As has been known, the Nyquist first condition promises no intersymbol interference (ISI) as derived in the frequency domain. However, the practical implementation using the FIR filter truncates the Fourier transform by its window and prevents the mathematical calculation from reaching the ideal solution at zero-ISI. For obtaining better results, an increase in the window's length is required in general. To address this problem, a new approach is presented by using auxiliary factors (AFs) to compensate shortcomings of the truncated Fourier transform and remove the ISI completely, regardless of the window's length. In addition, the performance in the presence of the timing jitter is also improved significantly. The closed-form solution of the AFs is derived and the effectiveness is confirmed by the simulation results. Finally, the problems of the transmission delay and additional calculation complexity are analysed.
