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Radio Access Technologies for Broadband Mobile Communications
Mamoru SAWAHASHI Kenichi HIGUCHI
IEICE TRANSACTIONS on Communications
Publication Date: 2017/09/01
Online ISSN: 1745-1345
Type of Manuscript: INVITED PAPER (Special Issue the Past, Present, and Future of Communications Technologies in the IEICE)
Category: Wireless Communication Technologies
W-CDMA, HSDPA, HSUPA, LTE, LTE-Advanced, multi-access scheme, radio access technologies,
Full Text: FreePDF(2.1MB)
This paper describes the broadband radio access techniques for Universal Mobile Terrestrial Systems (UMTS)/Wideband Code Division Multiple Access (W-CDMA), High-Speed Downlink Packet Access (HSDPA)/High-Speed Uplink Packet Access (HSUPA), Long Term Evolution (LTE), and LTE-Advanced. Major technical pillars are almost identical regardless of the radio access systems of the respective generations. However, the key techniques that provide distinct performance improvements have changed according to the system requirements in each generation. Hence, in this paper, we focus on the key techniques associated with the system requirements. We also describe the requirements, radio access technology candidates, and challenges toward the future 5G systems.