Downlink Non-Orthogonal Multiple Access (NOMA) Combined with Single User MIMO (SU-MIMO)
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- BENJEBBOUR Anass
- 5G Laboratory, NTT DOCOMO INC.
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- LI Anxin
- DOCOMO Beijing Communications Laboratories Co., Ltd.
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- SAITO Keisuke
- 5G Laboratory, NTT DOCOMO INC.
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- KISHIYAMA Yoshihisa
- 5G Laboratory, NTT DOCOMO INC.
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- NAKAMURA Takehiro
- 5G Laboratory, NTT DOCOMO INC.
抄録
This paper investigates a downlink non-orthogonal multiple access (NOMA) combined with single user MIMO (SU-MIMO) for future LTE (Long-Term Evolution) enhancements. In particular, we propose practical schemes to efficiently combine NOMA with open-loop SU-MIMO (Transmission Mode 3: TM3) and closed-loop SU-MIMO (Transmission Mode 4: TM4) specified in LTE. The goal is also to clarify the performance gains of NOMA combined with SU-MIMO transmission, taking into account the LTE radio interface such as frequency-domain scheduling, adaptive modulation and coding (AMC), and NOMA specific functionalities such as, multi-user pairing/ordering, transmit power allocation and successive interference cancellation (SIC) at the receiver side. Based on computer simulations, we evaluate NOMA link-level performance and show that the impact of error propagation associated with SIC is marginal when the power ratio of cell-edge and cell-center users is sufficiently large. In addition, we evaluate NOMA system-level performance gains for different granularities of scheduling and MCS (modulation and coding scheme) selection, for both genie-aided channel quality information (CQI) estimation and approximated CQI estimation, and using different number of power sets. Evaluation results show that NOMA combined with SU-MIMO can still provide a hefty portion of its expected gains even with approximated CQI estimation and limited number of power sets, and also when LTE compliant subband scheduling and wideband MCS is applied.
収録刊行物
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- IEICE Transactions on Communications
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IEICE Transactions on Communications E98.B (8), 1415-1425, 2015
一般社団法人 電子情報通信学会
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詳細情報 詳細情報について
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- CRID
- 1390001204374321920
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- NII論文ID
- 130005090340
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- ISSN
- 17451345
- 09168516
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可