NOMA is the mobile technology that embraces and satisfies all the needs of the upcoming mobile communication generation. In this regard, we are analyzing the behavior of NOMA in wireless communication with two orthogonal waveforms. In this paper, we overviewed the previous generations of mobile communication technology and their features. We discuss the need, basic principle involved in NOMA and the features of NOMA. We focus on the drawbacks and research challenges in NOMA by discussing various methods to approach NOMA by comparing different processes. We discussed on some parameters that NOMA should achieve and have already achieved to produce high efficiency.