Auxiliary Factor Method to Remove ISI of Nyquist Filters

As has been known, the Nyquist first condition promises no intersymbol interference (ISI) as derived in frequency domain. However, practical implementation using FIR filter truncates Fourier transform by its window and prevents mathematical calculation from reaching ideal solution at zero-ISI. For obtaining better results, an increase window’s length is required general. To address this problem, a new approach presented auxiliary factors (AFs) to compensate shortcomings of truncated remove ISI completely, regardless length. In addition, performance presence timing jitter also improved significantly. The closed-form AFs effectiveness confirmed simulation results. Finally, problems transmission delay additional complexity are analysed.