Efficient Combinations of NOMA With Distributed Antenna Systems Based on Channel Measurements for Mitigating Jamming Attacks

Farah, Joumana; Simon, Eric Pierre; Laly, Pierre; Delbarre, Gauthier

doi:10.1109/jsyst.2020.3000655

Cited by 6 publications

(3 citation statements)

References 27 publications

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“…This knowledge is needed for the uncoordinated setup, where devices access channels without the need to be granted access beforehand by the CPU. In this work, we mainly focus on the centralized operation of the network, where APs act as remote radio heads (RRHs) as in [23], [24]. However, the distributed operation [21] can be applied as an extension to this study.…”

Section: System Modelmentioning

confidence: 99%

Uncoordinated Transmissions in Uplink IoT Cell-Free Massive MIMO Systems Based on NOMA

Farah,

Ghanem,

Simon

2023

2023 31st European Signal Processing Conference (EUSIPCO)

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This paper presents a new framework comprising the combination of uplink cell-free massive multiple input multiple output (mMIMO) with non-orthogonal multiple access (NOMA) for serving Internet-of-Things (IoT) devices in an uncoordinated manner. We investigate the benefits of reinforcement learning to support the massive connectivity and quality of service (QoS) requirements of IoT devices. Using the multi-armed bandit technique, the devices jointly determine their subband and transmit power, without any cooperation, in such a way as to strike a balance between the QoS and the transmit power. Applied with a dynamic cooperation clustering of serving access points (APs), the allocation technique is shown to achieve a quick convergence while having a negligible loss in performance towards a system that relies on all deployed APs for serving the devices.

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Section: System Modelmentioning

confidence: 99%

Uncoordinated Transmissions in Uplink IoT Cell-Free Massive MIMO Systems Based on NOMA

Farah,

Ghanem,

Simon

2023

2023 31st European Signal Processing Conference (EUSIPCO)

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“…To address the aforementioned limitations of MIMO systems, non-orthogonal multiple access (NOMA) techniques can be incorporated into massive MIMO systems, as reported in previous studies such as [5]- [8]. NOMA is achieved by multiplexing two or more signals in the power domain on the same beam, with the use of successive interference cancellation (SIC) at some of the receivers to separate the signals.…”

Section: Introductionmentioning

confidence: 99%

Resource Allocation and Pairing Techniques in Multiuser Massive MIMO-NOMA

Simon,

Farah,

Laly

2023

IEEE Systems Journal

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In massive multiple-input multiple-output (MIMO) systems, user clustering techniques are crucial for addressing inter-beam interference. These techniques become even more critical when incorporating non-orthogonal multiple access (NOMA) to enhance spectral efficiency and user fairness. Prior research in this area has primarily focused on channel correlation for user pairing. This paper presents a novel approach for user pairing and subband allocation in a crowded downlink system that utilizes a criterion based on minimizing the condition number (CN) of channel matrices. A benchmark resource allocation technique, which is based on a rate maximization criterion and has a higher complexity but quasi-optimal performance, is also introduced. To evaluate the performance of the proposed technique in a realistic setting, experimental massive MIMO channel measurements in a dense user deployment scenario are used. Results indicate that the CN criterion leads to significantly higher throughput and fairness levels compared to the channel correlation criterion and achieves performance that is close to that obtained with rate maximization. The study is further extended to the case of multi-antenna reception, where interference cancellation techniques are proposed to increase the throughput of users with low channel gains. The proposed methods outperform a well-referenced technique in the literature.

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“…A new network architecture without the concept of cells appeared a few years ago: the cell-free mobile network [2], [3], [4], [5]. In the cell-free context, an important number of access points (APs) distributed over a large geographical area cooperate to optimally serve the users (UE).…”

Section: Introductionmentioning

confidence: 99%

Measurement of the V2I Channel in Cell-free Vehicular Networks with the Distributed MaMIMOSA Channel Sounder

Simon

Laly

Farah

et al. 2023

2023 17th European Conference on Antennas and Propagation (EuCAP)

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In this paper, we present a small, yet realistic, vehicular cell-free massive MIMO (multiple-input multiple-output) architecture deployed at the University of Lille in a typical suburban environment under both Line-of-Sight (LOS) and obstructed LOS (OLOS) shadowing conditions. The radio channels were acquired with a distributed RF-over-Fiber (RoF) upgrade of the real-time channel sounder MaMIMOSA. The system operates at 5.89 GHz with an 80 MHz bandwidth, which corresponds to the ITS frequency band offered by the ITS-G5 and C-V2X technologies. Four omnidirectional receive antennas were placed on the roof of a van moving at a speed of 25 km/h. The propagation channel was measured for various transmit antenna configurations, ranging from co-located antennas to fully distributed antennas. The measurement results show a significant gain in the signal-to-noise ratio (SNR) as well as a more uniform coverage and smaller delay spread values with the distributed scenarios compared to the centralized ones. Finally, the path loss measurement results obtained for the cell-free network provide deployment guidelines for the distributed antennas.

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Efficient Combinations of NOMA With Distributed Antenna Systems Based on Channel Measurements for Mitigating Jamming Attacks

Cited by 6 publications

References 27 publications

Uncoordinated Transmissions in Uplink IoT Cell-Free Massive MIMO Systems Based on NOMA

Uncoordinated Transmissions in Uplink IoT Cell-Free Massive MIMO Systems Based on NOMA

Resource Allocation and Pairing Techniques in Multiuser Massive MIMO-NOMA

Measurement of the V2I Channel in Cell-free Vehicular Networks with the Distributed MaMIMOSA Channel Sounder

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