Abstract
We consider time and frequency-packed (TFP) multicarrier faster-than-Nyquist (MFTN) transmission that realizes non-orthogonal linear modulation to achieve higher spectral efficiency (SE) compared to the well-known orthogonal transmission at Nyquist rate. Such SE benefits come at the price of intersymbol interference (ISI) and inter-carrier interference (ICI), which usually are equalized through computationally demanding receiver-side processing. In this paper, we investigate an alternative approach of pre-equalizing the interference at the transmitter, for the first time in an MFTN system where symbols are packed in both time and frequency dimensions. First, we present a two-dimensional linear precoding technique to jointly mitigate the ISI and ICI at the transmitter. Second, we propose a partial precoding strategy to pre-equalize the ISI at the transmitter, while ICI being compensated at the receiver through an iterative interference cancellation method. We validate the flexibility of our designs by simulating a precoded coherent optical fiber communication system, as a practical application example for MFTN. Our numerical results confirm significant performance and complexity advantages of the proposed precoding schemes over existing interference mitigation approaches.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
