Comprehensive Study on MIMO-Related Interference Management in WLANs

Yao, Junmei; Xu, Jun; Luo, Sheng; Wang, Lu; Yang, Chao; Wu, Kaishun; Lou, Wei

doi:10.1109/comst.2019.2894160

Cited by 19 publications

(4 citation statements)

References 89 publications

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“…where N is a complex Gaussian noise, which is mutually uncorrelated between different subcarriers, h i is the i th tap of the channel impulse response [30]. Equation ( 6) means that a receiver cannot distinguish whether a propagation path results from the CDD scheme or the channel itself [4]. After FFT transformation and pilot extraction at the receiver side, we have the following equations:…”

Section: -2-receivermentioning

confidence: 99%

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Low Complex Standard Conformable Transceiver based on Doppler Spread for DVB-T2 Systems

Ghazi‐Maghrebi¹,

Akbarian²

2021

jist

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This paper addresses a novel Alamouti space-frequency block decoding scheme with discontinuous Doppler diversity (DDoD) and cyclic delay diversity (CDD). We investigate different antenna diversity concepts, which can be applied to orthogonal frequency division multiplexing (OFDM) systems over highly frequency selective channels. The main object of this research is standard compatibility and the effect of simple diversity techniques on the channel fading properties. Therefore, we analyze a receiver in terms of the effective channel transfer function, which leads to the possibility of optimizing diversity. Besides, a novel transceiver using DDoD is proposed, which increases the Doppler spread of the multipath fading channel without causing additional Intercarrier Interference (ICI). Moreover, an efficient Alamouti encoder and decoder based on CDD is proposed, which allows a high reliability and capacity enhancement. In order to evaluate the capability of that, we have implemented this scheme for the second-generation terrestrial video broadcasting (DVB-T2) system over different channels. Furthermore, mathematical analysis and simulation results show the bit error performance of the modified encoding method with these diversity techniques, performs mostly better than the other forms of encoding Alamouti over highly frequency-selective channels such as single frequency networks (SFN). The other advantages of the proposed method are simplicity, flexibility, and standard compatibility.

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Section: -2-receivermentioning

confidence: 99%

“…, this is because the SNR does not increase further when d i cyc >1.5μs, as shown in [4]. The performance of the un-coded strategy is also evaluated; thus the coding and interleaving blocks are bypassed in our system simulation.…”

Section: -1-the δH-alamouti Decoding Using Cdd (Strategy 1)mentioning

confidence: 99%

Low Complex Standard Conformable Transceiver based on Doppler Spread for DVB-T2 Systems

Ghazi‐Maghrebi¹,

Akbarian²

2021

jist

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“…To better spatial reuse and mitigate inter-cell interference, EHT recommends CBF [82] each transmit signal on the intended STAs while doing the signal null at the non-served STAs, thus achieving multiple concurrent transmissions. To implement spatial radiation nulling in the multiple BSSs, one can use different ways as surveyed in [86]. Simulation results in [87] showed that CBF could provide major sum throughput gain over single AP and CSR.…”

Section: Multimentioning

confidence: 99%

IEEE 802.11be-Wi-Fi 7: New Challenges and Opportunities

Deng

Fang

Han

et al. 2020

Preprint

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With the emergence of 4k/8k video, the throughput requirement of video delivery will keep grow to tens of Gbps. Other new high-throughput and low-latency video applications including augmented reality (AR), virtual reality (VR), and online gaming, are also proliferating. Due to the related stringent requirements, supporting these applications over wireless local area network (WLAN) is far beyond the capabilities of the new WLAN standard -IEEE 802.11ax. To meet these emerging demands, the IEEE 802.11 will release a new amendment standard IEEE 802.11be -Extremely High Throughput (EHT), also known as Wireless-Fidelity (Wi-Fi) 7. This article provides the comprehensive survey on the key medium access control (MAC) layer techniques and physical layer (PHY) techniques being discussed in the EHT task group, including the channelization and tone plan, multiple resource units (multi-RU) support, 4096 quadrature amplitude modulation (4096-QAM), preamble designs, multiple link operations (e.g., multi-link aggregation and channel access), multiple input multiple output (MIMO) enhancement, multiple access point (multi-AP) coordination (e.g., multi-AP joint transmission), enhanced link adaptation and retransmission protocols (e.g., hybrid automatic repeat request (HARQ)). This survey covers both the critical technologies being discussed in EHT standard and the related latest progresses from worldwide research. Besides, the potential developments beyond EHT are discussed to provide some possible future research directions for WLAN.

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“…Recently, sophisticated techniques have been proposed to handle the co-channel interference in wireless local area networks (WLANs) [20]. These techniques are under different names such as network MIMO [15,33] and joint multi-user processing [5,34]. The basic idea of these techniques is to jointly process the signals at all APs so that all the antennas on the APs can be fully utilized for multi-user MIMO transmission.…”

mentioning

confidence: 99%

Tcci

Quadri

Pirayesh

Sangdeh

et al. 2020

Proceedings of the Twenty-First International Symposium on Theory, Algorithmic Foundations, and Protocol Design for Mobile Netw

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Co-channel interference is a fundamental issue in wireless local area networks (WLANs). Although many results have been developed to handle co-channel interference for concurrent transmission, most of them require network-wide fine-grained synchronization and data sharing among access points (APs). Such luxuries, however, are not affordable in many WLANs due to their hardware limitation and data privacy concern. In this paper, we present TCCI, a co-channel interference management scheme to enable concurrent transmission in WLANs. TCCI requires neither network-wide fine-grained synchronization nor inter-network data sharing, and therefore is amenable to real-world implementation. The enabler of TCCI is a new detection and beamforming method for an AP, which is capable of taming unknown interference by leveraging its multiple antennas. We have built a prototype of TCCI on a wireless testbed and demonstrated its compatibility with commercial Atheros 802.11 devices. Our experimental results show that TCCI allows co-located APs to serve their users simultaneously and achieves up to 113% throughput gain compared to existing interference-avoidance protocol. CCS CONCEPTS • Networks → Wireless access points, base stations and infrastructure; Network protocol design.

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Comprehensive Study on MIMO-Related Interference Management in WLANs

Cited by 19 publications

References 89 publications

Low Complex Standard Conformable Transceiver based on Doppler Spread for DVB-T2 Systems

Low Complex Standard Conformable Transceiver based on Doppler Spread for DVB-T2 Systems

IEEE 802.11be-Wi-Fi 7: New Challenges and Opportunities

Tcci

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