Non-Orthogonal Multiple Access, A Key Means to Improve Spectrum Efficiency in 5G

• 1、 Department of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876

Abstract：The arrival of 5G not only brings opportunities to the radio field, but also brings unprecedented challenges to it. Especially under the situation that resource spectrum is becoming more and more precious, how to effectively improve the spectrum efficiency and system capacity of communication systems is a key issue that needs to be solved urgently in future radio networks. Non-orthogonal multiple access (NOMA), as one of the key implementation technologies of 5G communication systems, can solve some of the challenges faced by 5G, such as high spectrum efficiency and large-scale connections due to the increasing demand for mobile Internet, which is a promising wireless access technology. This topic closely follows the current development trend of radio communication technology, and studies how non-orthogonal multiple access technology can solve the problem of spectrum efficiency in the 5G era and the present works of NOMA.

Keywords： Wireless Communication Non-Orthogonal Multiple Access Spectrum Efficiency 5G