Non-orthogonal multiple access in downlink coordinated multipoint transmissions

Hendraningrat, Denny Kusuma; Narottama, Bhaskara; Shin, Soo Young

doi:10.1016/j.phycom.2020.101017

Cited by 10 publications

(12 citation statements)

References 46 publications

(48 reference statements)

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“…• Instead of the probability of error on IQ domain, this paper estimates probability of error on antenna index by using maximum likelihood (ML) detector. It is different from previous work in [17] that assumed user can detect antenna index perfectly. • This paper provides a closed-form solution for ergodic sum capacity (ESC) of the proposed system, which is derived through a mathematical analysis by considering imperfect SIC and imperfect channel state information (CSI).…”

Section: Introductionmentioning

confidence: 59%

“…In this paper, the system is modeled as a generalized multicell system with K number of coordinated BSs within N number of neighboring cells. To compare it with previous work in [17], each coordinated cell consists of a BS, one CEU and one CCU as shown in Fig. 1.…”

Section: System Modelmentioning

confidence: 99%

“…For simplicity, this paper assumes that the links between BS antenna and users are identical. Imperfect CSI is considered to have channel estimation error (CSE) because in reality there is no perfect channel estimation [15], [17]. The CSE for the j th CCU and the k th CEU can be modeled by h εij = h ij −ĥ ij and h εik = h ik −ĥ ik , respectively.…”

Section: Transmission Protocolmentioning

confidence: 99%

“…However, most of the conventional CoMP only considers single CEU within multiple CoMP BSs [13]- [15]. Considering the number of CEU that may be equal to or more/less than CCUs in practice, joint transmission CoMP with virtual user pairing-based NOMA (JT-CoMP VP-NOMA) [16] and joint transmission CoMP works over NOMA integrated with spatial modulation (JT-CoMP NOMA-SM) [17] are proposed to handle multiple CEUs as well as the ICI issue. In JT-CoMP NOMA-SM, spatial modulation (SM) is used for serving multiple CEUs which are considered ineffective to be transmitted using CoMP technique [18], [19].…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, CB NOMA can improve both capacity and user fairness because two users paired in each cell are served by its BS independently. By considering superiority of SM such as improving capacity, mitigating ICI and handling multiple CEUs [17]- [20], the SM can be implemented in CB NOMA where one transmitting antenna is activated to transmit symbols at a particular time. The practical use of CB NOMA combined with SM (CB NOMA-SM) depends on the system model.…”

Section: Introductionmentioning

confidence: 99%

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Coordinated Beamforming for Multi-Cell Non-Orthogonal Multiple Access-Based Spatial Modulation

2020

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This paper proposes coordinated beamforming (CB) that works over non-orthogonal multiple access (NOMA) scheme integrated with spatial modulation (SM), termed as CB NOMA-SM, to improve capacity and user fairness. User capacity, ergodic sum capacity (ESC), and user fairness of K number of coordinated base stations (BSs) are simulated and analyzed by comparing them with joint transmission coordinated multi-point based NOMA with SM (JT-CoMP NOMA-SM), NOMA, and orthogonal multiple access (OMA). The results show that the proposed system outperforms the other schemes both in ESC and user fairness due to the enhancing CEU while CCU capacity still can be maintained. INDEX TERMS Non-orthogonal multiple access (NOMA), coordinated beamforming (CB), spatial modulation (SM), capacity, user fairness.

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Section: Introductionmentioning

confidence: 59%

Section: System Modelmentioning

confidence: 99%