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New shapes of pulses to make it best FTN-signaling

DOI 10.18127/j00338486-201812-05


A.L. Gelgor – Ph.D.(Eng.), Associate Professor, Higher School of Applied Physics and Space Technologies of Peter The Great St. Petersburg Polytechnic University
T.E. Gelgor – Senior Lecturer, Department «Experimental Physics», Peter The Great St. Petersburg Polytechnic University

Faster-than-Nyquist (FTN) signaling is the promising idea that theoretically provides for a significant increase in the spectral efficiency without energy losses. The gain is achieved through incorporating intersymbol interference (ISI) by simply increasing symbol rate. Another way to increase spectral efficiency is to use pulses assuming incorporating ISI. It is commonly called Partial Response (PR) signaling. Both approaches achieve declared gains only asymptotically, i.e. at very low values of the bit error rate (BER) and a high computational complexity of the detection algorithms. In this paper, we propose a new optimization criterion for synthesizing pulses for PR signaling. It is shown in the article that PR signaling with the pulses proposed by us outperform FTN signaling and PR signaling with other known optimal pulses. Moreover, it is achieve the Mazo limit at BER = 10−4 and with low computational complexity of signal detection.

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