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Improved Nyquist Filters with Piece-Wise Parabolic Frequency Characteristics

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2 Author(s)
Alexandru, N.D. ; Dept. of Telecommun., Gh. Asachi Tech. Univ. of Iasi, Iasi, Romania ; Balan, A.L.O.

This paper presents and investigates a novel approach for constructing a family of ISI-free pulses having an asymptotic decay rate of t-2, and comparable or better ISI performance as compared to several recently proposed pulses. The proposed solution for the design of Nyquist pulses is based on a piece-wise parabolic frequency characteristic. This can be considered as a piece-wise polynomial frequency characteristic with second degree polynomials. It is shown that a lower bit error rate (BER) can be achieved for same values of the roll-off factor, timing jitter, signal to noise ratio and number of interfering pulses, as compared to recently reported pulses.

Published in:

Communications Letters, IEEE  (Volume:15 ,  Issue: 5 )