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Multichannel Uplink NOMA Random Access: Selection Diversity and Bistability

Title
Multichannel Uplink NOMA Random Access: Selection Diversity and Bistability
Author
Hu Jin
Keywords
Bistability; non-orthogonal multiple access; successive interference cancellation
Issue Date
2019-09
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Citation
IEEE COMMUNICATIONS LETTERS, v. 23, No. 9, Page. 1515-1519
Abstract
This letter investigates uplink random access (RA) systems based on power-domain non-orthogonal multiple access (NOMA) with multichannel. In NOMA RA systems, users transmit their packet with transmit power by inverting their channel gain, i.e., channel inversion, such that the received power of their packet at the base station (BS) can be one of the predefined values. While this facilitates the decoding process based on successive interference cancellation (SIC), it can incur excessive transmit power consumption upon low channel gains. To reduce transmit power (improve energy efficiency), this letter considers multichannel selection diversity, where users choose one channel whose channel gain is the maximum of all. We characterize the stability of multichannel NOMA RA systems with the cusp catastrophe and analyze diversity gain in terms of energy efficiency.
URI
https://ieeexplore.ieee.org/document/8744236http://repository.hanyang.ac.kr/handle/20.500.11754/120876
ISSN
1089-7798; 1558-2558
DOI
10.1109/LCOMM.2019.2924415
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > ELECTRICAL ENGINEERING(전자공학부) > Articles
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