Uplink Non-Orthogonal Multiple Access (NOMA) with Single-Carrier Frequency Division Multiple Access (SC-FDMA) for 5G Systems

Li, Anxin; Benjebbour, Anass; Chen, Xiaohang; Jiang, Huiling; Kayama, Hidetoshi

doi:10.1587/transcom.e98.b.1426

Cited by 55 publications

(25 citation statements)

References 10 publications

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“…NOMA is employed for downlink transmissions as in [7]. However, there are some existing works of NOMA for uplink transmissions, e.g., [12] [13] [14].…”

Section: Introductionmentioning

confidence: 99%

“…Since the BS can carefully allocate powers to the signals to users with known CSI, exploiting the power difference for NOMA becomes easier for downlink transmissions than uplink transmissions. If NOMA is employed for uplink, the BS also needs to carefully allocate powers and users over multiple channels with full CSI as in [12] [13]. From this, it seems that NOMA is not suitable for any uncoordinated transmissions including random access despite its strength of providing higher spectral efficiency.…”

Section: Introductionmentioning

confidence: 99%

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NOMA-Based Random Access With Multichannel ALOHA

Choi

2017

IEEE J. Select. Areas Commun.

233

156

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In nonorthogonal multiple access (NOMA), the power difference of multiple signals is exploited for multiple access and successive interference cancellation (SIC) is employed at a receiver to mitigate co-channel interference. Thus, NOMA is usually employed for coordinated transmissions and mostly applied to downlink transmissions where a base station (BS) performs coordination for downlink transmissions with full channel state information (CSI). In this paper, however, we show that NOMA can also be employed for non-coordinated transmissions such as random access for uplink transmissions. We apply a NOMA scheme to multichannel ALOHA and show that the throughput can be improved. In particular, the resulting scheme is suitable for random access when the number of subchannels is limited since NOMA can effectively increase the number of subchannels without any bandwidth expansion.

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“…NOMA is employed for downlink transmissions as in [7]. However, there are some existing works of NOMA for uplink transmissions, e.g., [12] [13] [14].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

NOMA-Based Random Access With Multichannel ALOHA

Choi

2017

IEEE J. Select. Areas Commun.

233

156

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“…According to the simulation results, PD-NOMA can improve the resource utilization efficiency in both uplink and downlink [34]. Meanwhile, PD-NOMA can maintain low peak to average power ratio (PAPR) if singlecarrier property is kept [35]. In addition, PD-NOMA does not depend on the information of instantaneous channel state information (CSI) of frequency-selective fading.…”

Section: Bit-level Nomamentioning

confidence: 99%

Uplink Nonorthogonal Multiple Access Technologies Toward 5G: A Survey

Han

Zhao

et al. 2018

Wireless Communications and Mobile Computing

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Owing to the superior performance in spectral efficiency, connectivity, and flexibility, nonorthogonal multiple access (NOMA) is recognized as the promising access protocol and is now undergoing the standardization process in 5G. Specifically, dozens of NOMA schemes have been proposed and discussed as the candidate multiple access technologies for the future radio access networks. This paper aims to make a comprehensive overview about the promising NOMA schemes. First of all, we analyze the state-of-the-art NOMA schemes by comparing the operations applied at the transmitter. Typical multiuser detection algorithms corresponding to these NOMA schemes are then introduced. Next, we focus on grant-free NOMA, which incorporates the NOMA techniques with uplink uncoordinated access and is expected to address the massive connectivity requirement of 5G. We present the motivation of applying grant-free NOMA, as well as the typical grant-free NOMA schemes and the detection techniques. In addition, this paper discusses the implementation issues of NOMA for practical deployment. Finally, we envision the future research challenges deduced from the recently proposed NOMA technologies.

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“…It was shown that by searching only the user combinations that are worth non-orthogonally-multiplexing, the number of the user combinations to be searched can be significantly reduced while keeping almost identical average and celledge throughput performance compared with conventional exhaustive search method. Similar to downlink NOMA, resource allocation, user grouping, and power allocation issues are studied in [64], [65] for uplink single-carrier frequency division multiple access (SC-FDMA).…”

Section: Advanced Modulation and Multiple Access Schemesmentioning

confidence: 99%

Radio Access Technologies for Fifth Generation Mobile Communications System: Review of Recent Research and Developments in Japan

Murata

Okamoto

Mikami

et al. 2016

IEICE Trans. Commun.

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SUMMARY As the demand for higher transmission rates and spectral efficiency is steadily increasing, the research and development of novel mobile communication systems has gained momentum. This paper focuses on providing a comprehensive survey of research and development activities on fifth generation mobile communication systems in Japan. We try to survey a vast area of wireless communication systems and the developments that led to future 5G systems.

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Uplink Non-Orthogonal Multiple Access (NOMA) with Single-Carrier Frequency Division Multiple Access (SC-FDMA) for 5G Systems

Cited by 55 publications

References 10 publications

NOMA-Based Random Access With Multichannel ALOHA

NOMA-Based Random Access With Multichannel ALOHA

Uplink Nonorthogonal Multiple Access Technologies Toward 5G: A Survey

Radio Access Technologies for Fifth Generation Mobile Communications System: Review of Recent Research and Developments in Japan

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