Abstract
In coordinated multipoint (CoMP) system, the cell-edge performance is improved by minimizing inter-cell interference (ICI) through coordination of resources. Additionally, the non-orthogonal multiple access (NOMA) has been introduced as a promising candidate to further enhance the throughput of next generation wireless communication systems. NOMA allows multiple users to access the wireless channel in the same bandwidth simultaneously, however at different transmit power. In joint transmission NOMA in CoMP (JT-NOMA-CoMP), multiple cells jointly transmit data to users using the same time-frequency resources, which significantly improves the system performance. In this paper, we present a low-complexity user clustering and resource allocation strategy in downlink JP-NOMA-CoMP system with multiple antenna. Based on computer simulation, we show that the proposed approach outperforms the conventional JP-OMA-CoMP and single antenna JP-NOMA-CoMP in terms of achievable sum rate.
Highlights
Coordinated Multipoint (CoMP) transmission and reception is considered as one of the principle empowering technologies for LTE-Advanced
If the orthogonal multiple access (OMA) is adopted, the spectral efficiency of the system deteriorates with the increasing number of cell edge users
We propose suboptimal resource allocation scheme for JT-non-orthogonal multiple access (NOMA)-CoMP in downlink transmission with multiple antennas at base stations and user devices
Summary
Coordinated Multipoint (CoMP) transmission and reception is considered as one of the principle empowering technologies for LTE-Advanced. The system spectral efficiency enhancement is attained through base station cooperation where resources are allocated among users in a coordinated way [1]. If the orthogonal multiple access (OMA) is adopted, the spectral efficiency of the system deteriorates with the increasing number of cell edge users. To overcome this issue, non-orthogonal multiple access (NOMA) can be employed [2, 3]. Under power-domain NOMA, a base station schedules multiple users to use the same transmission resources by superposing their signals in the power domain. We propose suboptimal resource allocation scheme for JT-NOMA-CoMP in downlink transmission with multiple antennas at base stations and user devices.
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