5G and other next-generation telecommunications technologies require sufficient bandwidth, reliability, and speed. The deployment of mixed numerologies can harness the diverse use cases of 5G, including Enhanced Mobile Broadband (eMBB), Ultra Reliable Low-Latency Communication (URLLC), and Massive Machine Type Communication (mMTC) or Internet of Things (IoT). Although this sounds like a great initiative, it ushers a new challenge known as internumerology interference (INI). To address this issue, this paper proposes a novel pulse shaping technique, specifically windowing, to facilitate the implementation of mixed numerology transmission. The effectiveness of the proposed technique will be analyzed using the Error Vector Magnitude (EVM) metric. The analysis will be conducted using four modulation schemes used in 5G, namely Quadrature Phase Shift Keying (QPSK), 16 Quadrature Amplitude Modulation (16 QAM), 64 QAM, and 256 QAM.
