Relay-Aided NOMA in Uplink Cellular Networks

Wonjae Shin; Heecheol Yang; Mojtaba Vaezi; Jungwoo Lee; H. Vincent Poor

doi:10.1109/LSP.2017.2755049

Relay-Aided NOMA in Uplink Cellular Networks

Wonjae Shin, Heecheol Yang, Mojtaba Vaezi, Jungwoo Lee, H. Vincent Poor

Research output: Contribution to journal › Article › peer-review

31 Scopus citations

Abstract

A new relay-aided non-orthogonal multiple access (NOMA) technique is proposed for multi-cell uplink cellular networks in which each cell supports K single-antenna users by its respective base station (BS) equipped with N (<< K) antennas. Cooperative relaying transmission is used to accommodate more than one user per orthogonal resource block in the context of interference-limited cellular networks. With the proposed relay-aided NOMA, an Alamouti structure of the desired symbol can further be generated at each BS free of interference, which gives rise to diversity gain of two. The proposed scheme does not require any channel state information (CSI) at users. Further, only limited CSI is required at relays and BSs, which can greatly reduce the control overhead.

Original language	English (US)
Article number	8047970
Pages (from-to)	1842-1846
Number of pages	5
Journal	IEEE Signal Processing Letters
Volume	24
Issue number	12
DOIs	https://doi.org/10.1109/LSP.2017.2755049
State	Published - Dec 2017

All Science Journal Classification (ASJC) codes

Signal Processing
Electrical and Electronic Engineering
Applied Mathematics

Keywords

Non-orthogonal multiple access (NOMA)
relay

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10.1109/LSP.2017.2755049

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title = "Relay-Aided NOMA in Uplink Cellular Networks",

abstract = "A new relay-aided non-orthogonal multiple access (NOMA) technique is proposed for multi-cell uplink cellular networks in which each cell supports K single-antenna users by its respective base station (BS) equipped with N (<< K) antennas. Cooperative relaying transmission is used to accommodate more than one user per orthogonal resource block in the context of interference-limited cellular networks. With the proposed relay-aided NOMA, an Alamouti structure of the desired symbol can further be generated at each BS free of interference, which gives rise to diversity gain of two. The proposed scheme does not require any channel state information (CSI) at users. Further, only limited CSI is required at relays and BSs, which can greatly reduce the control overhead.",

keywords = "Non-orthogonal multiple access (NOMA), relay",

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AU - Shin, Wonjae

AU - Yang, Heecheol

AU - Vaezi, Mojtaba

AU - Lee, Jungwoo

AU - Poor, H. Vincent

PY - 2017/12

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AB - A new relay-aided non-orthogonal multiple access (NOMA) technique is proposed for multi-cell uplink cellular networks in which each cell supports K single-antenna users by its respective base station (BS) equipped with N (<< K) antennas. Cooperative relaying transmission is used to accommodate more than one user per orthogonal resource block in the context of interference-limited cellular networks. With the proposed relay-aided NOMA, an Alamouti structure of the desired symbol can further be generated at each BS free of interference, which gives rise to diversity gain of two. The proposed scheme does not require any channel state information (CSI) at users. Further, only limited CSI is required at relays and BSs, which can greatly reduce the control overhead.

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Relay-Aided NOMA in Uplink Cellular Networks

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