Internet of Things (IoT) is one of the most important 5G scenarios that is promising to change the way technology is experienced in daily life and presents a great challenge for 5G design due to its requirements. Since coverage improvement is one of the requirements for IoT and massive machine type communication (mMTC), the enhancement of repeated transmission scheme is important. In this paper, we propose a new approach for repeated transmission scheme for future IoT wireless communications namely complementary filter bank multicarrier based offset quadrature amplitude modulation (FBMC/OQAM). As the FBMC/OQAM is considered a strong contender waveform for 5G networks. First, we describe the interference of FBMC/OQAM and then propose a new scheme based on opposite the prototype filter in repeated transmission to eliminate the interference. Next, Simulation results show that the BER performance of this complementary scheme outperforms the conventional FBMC/OQAM scheme.