Performance improvement of non-orthogonal multiple access scheme using code division multiplexing. (November 2017)

• Record Type: Journal Article
• Authors: Kitagawa, Hiroki; Okamoto, Eiji
• Is Part Of: International journal of distributed sensor networks. Volume 13:Number 11(2017)
• Publication Date: 2017-11
• Subjects: Non-orthogonal multiple access -- code division multiplexing -- successive interference cancelation -- downlink -- proportional fairness; Sensor networks -- Periodicals; Intelligent agents (Computer software) -- Periodicals; Multisensor data fusion -- Periodicals; 681.2
• DOI: 10.1177/1550147717744528
• Languages: English
• ISSNs: 1550-1329

Abstract

Currently, the standardization of fifth-generation mobile communication system (5G), which realizes 10 Gbps transmission, is in progress. In mobile communications, it is generally difficult to perform high-capacity transmission because of channel fading. Therefore, an adaptive resource allocation scheme based on users' channel conditions is adopted to enhance the system capacity. Recently, it has been shown that a non-orthogonal multiple access scheme can achieve a higher system capacity than orthogonal multiple access scheme. However, anticipating a continuous increase in mobile traffic, it is desired to further enhance the throughput of non-orthogonal multiple access scheme. Therefore, we propose an application of code division multiplexing to non-orthogonal multiple access scheme using successive interference canceler to improve the throughput performance. The improved performance is demonstrated through numerical simulations.