Fig. 3: Concept of the FNT-based DSP in the proposed structure.
From: Coherent optical interconnects using Fermat number transform and hollow core fibre
a The radix of the FNT is circularly distributed in the finite integer domain, due to the limitation of the modulo operation. Where \(F\) represents the modulus value and \(\alpha\) represents the radix of the FNT. b The radix of the discrete Fourier transform in the domain of complex-valued number. c The FNDE architecture is based on the FNT. The real part and imaginary part of the complex-valued sequence are separated and multiplied by the filter taps in the Fermat number domain to implement convolution. d The structure of FNT-based adaptive equalization (AEQ). FNT Fermat number transform, DSP digital signal processing, FNDE Fermat number domain equalization.
