TY - JOUR
T1 - Interference Cancellation via D2D CSI Sharing for MU-MISO-NOMA System with Limited Feedback
AU - Al-Wani, Mohanad M.
AU - Sali, Aduwati
AU - Awad, Sumaya D.
AU - Salah, Asem A.
AU - Ding, Zhiguo
AU - Noordin, Nor K.
AU - Hashim, Shaiful J.
AU - Leow, Chee Yen
N1 - Funding Information:
Manuscript received October 12, 2020; revised January 22, 2021; accepted March 9, 2021. Date of publication April 5, 2021; date of current version June 9, 2021. This work was supported in part by NOMA-MIMO Optimizing 5G Wireless Communication Performance Based on Hybrid NOMA with Partial Feedback for Multiuser MIMO GP-IPS/2018/9663000, under Grant 9663000, in part by EMOSEN-Energy Efficient MIMO-Based Wireless Transmission for SWIPT-Enabled Network under Grant 9671600, UPM/800-3/3/1/GPB/2019/9671600, in part by the ‘ATOM’ -Advancing the State of the Art of MIMO under Grant 690750-ATOM-H2020-MSCA-RISE-2015, UPM 6388800-10801. The review of this article was coordinated by Dr. Hai Lin. (Corresponding author: Aduwati Sali.) Mohanad M. Al-Wani, Aduwati Sali, Sumaya D. Awad, Nor K. Noordin, and Shaiful J. Hashim are with the Wireless and Photonic Networks Research Centre of Excellence (WiPNet), Department of Computer and Communication Systems Engineering, Faculty of Engineering, Universiti Putra Malaysia, Serdang, Selangor 43400, Malaysia (e-mail: [email protected]; [email protected]; [email protected]; [email protected]; [email protected]).
Publisher Copyright:
© 1967-2012 IEEE.
PY - 2021/5
Y1 - 2021/5
N2 - In downlink non-orthogonal multiple access (NOMA) with multiuser clustering, a single beamforming (BF) vector precodes the superimposed signal of strong and weak users. This precoding results in an imperfect inter-cluster interference (ICI) cancellation at weak users since the BF vectors are designed based on strong users' channels. Also, the ICI is highly increased with the number of transmit antennas, causing severe degradation in the performance of weak users and total system. In this paper, first, a new cooperative NOMA is introduced, in which weak user beam-matching (WBM) equalizer is proposed to remove the ICI at weak users by matching weak users' channels with the designed BF vectors. The process of WBM is accomplished with the aid of device-to-device (D2D) channel state information (CSI) sharing between the nearby strong and weak users. Second, based on WBM principle, strong user beam-matching (SBM) equalizer is proposed to eliminate the generated ICI at strong users in the case of limited feedback. Third, a new power allocation strategy is proposed to improve weak users' performance by considering the gained throughput from interference cancellation. Finally, besides the sum-rate, which is adopted as the performance metric by most of the existing NOMA works, the bit error rate (BER) of NOMA users in cooperative NOMA is calculated and compared with those in other schemes. Simulation results show that our cooperative NOMA with the proposed equalizers achieves significant sum-rate and BER improvements over other non-cooperative schemes with both perfect and limited feedback scenarios.
AB - In downlink non-orthogonal multiple access (NOMA) with multiuser clustering, a single beamforming (BF) vector precodes the superimposed signal of strong and weak users. This precoding results in an imperfect inter-cluster interference (ICI) cancellation at weak users since the BF vectors are designed based on strong users' channels. Also, the ICI is highly increased with the number of transmit antennas, causing severe degradation in the performance of weak users and total system. In this paper, first, a new cooperative NOMA is introduced, in which weak user beam-matching (WBM) equalizer is proposed to remove the ICI at weak users by matching weak users' channels with the designed BF vectors. The process of WBM is accomplished with the aid of device-to-device (D2D) channel state information (CSI) sharing between the nearby strong and weak users. Second, based on WBM principle, strong user beam-matching (SBM) equalizer is proposed to eliminate the generated ICI at strong users in the case of limited feedback. Third, a new power allocation strategy is proposed to improve weak users' performance by considering the gained throughput from interference cancellation. Finally, besides the sum-rate, which is adopted as the performance metric by most of the existing NOMA works, the bit error rate (BER) of NOMA users in cooperative NOMA is calculated and compared with those in other schemes. Simulation results show that our cooperative NOMA with the proposed equalizers achieves significant sum-rate and BER improvements over other non-cooperative schemes with both perfect and limited feedback scenarios.
KW - beamforming
KW - BER
KW - Cooperative NOMA
KW - CSI sharing
KW - device-to-device (D2D)
KW - limited feedback
KW - multiuser
UR - http://www.scopus.com/inward/record.url?scp=85103876065&partnerID=8YFLogxK
U2 - 10.1109/TVT.2021.3070989
DO - 10.1109/TVT.2021.3070989
M3 - Article
AN - SCOPUS:85103876065
SN - 0018-9545
VL - 70
SP - 4569
EP - 4584
JO - IEEE Transactions on Vehicular Technology
JF - IEEE Transactions on Vehicular Technology
IS - 5
M1 - 9395238
ER -