NOMA Beamforming in SDMA Networks: Riding on Existing Beams or Forming New Ones?

Zhiguo Ding

doi:10.1109/LCOMM.2022.3146583

NOMA Beamforming in SDMA Networks: Riding on Existing Beams or Forming New Ones?

Zhiguo Ding

Electrical Engineering

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23 Scopus citations

Abstract

In this letter, the design of non-orthogonal multiple access (NOMA) beamforming is investigated in a spatial division multiple access (SDMA) legacy system. In particular, two popular beamforming strategies in the NOMA literature, one to use existing SDMA beams and the other to form new beams, are adopted and compared. The studies carried out in the letter show that the two strategies realize different tradeoffs between system performance and complexity. For example, riding on existing beams offers a significant reduction in computational complexity, at the price of a slight performance loss. Furthermore, this simple strategy can realize the optimal performance when the users' channels are structured.

Original language	British English
Pages (from-to)	868-871
Number of pages	4
Journal	IEEE Communications Letters
Volume	26
Issue number	4
DOIs	https://doi.org/10.1109/LCOMM.2022.3146583
State	Published - 1 Apr 2022

Keywords

beamforming
Non-orthogonal multiple access (NOMA)
spatial division multiple access (SDMA)

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title = "NOMA Beamforming in SDMA Networks: Riding on Existing Beams or Forming New Ones?",

abstract = "In this letter, the design of non-orthogonal multiple access (NOMA) beamforming is investigated in a spatial division multiple access (SDMA) legacy system. In particular, two popular beamforming strategies in the NOMA literature, one to use existing SDMA beams and the other to form new beams, are adopted and compared. The studies carried out in the letter show that the two strategies realize different tradeoffs between system performance and complexity. For example, riding on existing beams offers a significant reduction in computational complexity, at the price of a slight performance loss. Furthermore, this simple strategy can realize the optimal performance when the users' channels are structured.",

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AB - In this letter, the design of non-orthogonal multiple access (NOMA) beamforming is investigated in a spatial division multiple access (SDMA) legacy system. In particular, two popular beamforming strategies in the NOMA literature, one to use existing SDMA beams and the other to form new beams, are adopted and compared. The studies carried out in the letter show that the two strategies realize different tradeoffs between system performance and complexity. For example, riding on existing beams offers a significant reduction in computational complexity, at the price of a slight performance loss. Furthermore, this simple strategy can realize the optimal performance when the users' channels are structured.

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KW - spatial division multiple access (SDMA)

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ER -

NOMA Beamforming in SDMA Networks: Riding on Existing Beams or Forming New Ones?

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