This work examines the
importance of inter-numerology interference mitigation in fifth-generation (5G)
NR orthogonal frequency-division multiplexing (OFDM) based systems. The impact
of multi-numerology on coexistence issues, latency, and performance is highlighted in this
work. The proposed work is a hybrid mitigation approach that combines time
domain mitigation by zero padding WOLA filtering and frequency domain
mitigation using a fixed guard-band. The work discusses each case separately,
then combines them and studies the overall improvements and the possible trade-off. The hybrid ZP WOLA mitigation
approach reached 78% - 91% BER reduction percentage in the ideal case (under
AWGN) and 37% - 72% BER reduction percentage under moderate fading (flat
Rayleigh fading).
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