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Wireless Networks Lab
เข้าร่วมเมื่อ 13 ก.ย. 2019
Aleksey Kureev – Non-Orthogonal Multiple Access: Fundamentals and Application in Wi-Fi
Non-Orthogonal Multiple Access (NOMA) is a promising way to increase spectral efficiency in wireless networks. It is based on the division of the power between multiple users. With NOMA, a single device can transmit data to multiple devices using only one antenna at the same time and frequency. The great advantage of NOMA is its great adaptability to existing multiple access techniques like frequency division multiple access and spatial division multiple access. As the result, NOMA attracts huge attention in standardization committees, responsible for Wi-Fi and 5G development. In this talk, we will cover the fundamentals of NOMA and discuss the main techniques that are used for signal generation and reception NOMA systems. We will also discuss differences between uplink NOMA and downlink NOMA. As an example, we consider the usage of NOMA in Wi-Fi.
Bio: Aleksey Kureev obtained his master’s degree in Applied Mathematics and Physics from the Moscow Institute of Physics and Technology in 2017. Currently, he is a researcher in Wireless Networks Lab, IITP RAS, a researcher at Laboratory of Telecommunication Systems (MIEM HSE), and PhD student in MIPT. His research interests include reconfigurable intelligent surfaces, massive machine-to-machine communication, ultra-dense networks and SDR prototyping of various radio access technologies.
Bio: Aleksey Kureev obtained his master’s degree in Applied Mathematics and Physics from the Moscow Institute of Physics and Technology in 2017. Currently, he is a researcher in Wireless Networks Lab, IITP RAS, a researcher at Laboratory of Telecommunication Systems (MIEM HSE), and PhD student in MIPT. His research interests include reconfigurable intelligent surfaces, massive machine-to-machine communication, ultra-dense networks and SDR prototyping of various radio access technologies.
มุมมอง: 0
วีดีโอ
Ruslan Yusupov - Brief Overview on Approaches to Model RAW in IEEE 802.11ah Networks
มุมมอง 116 ชั่วโมงที่ผ่านมา
Published in 2017 the IEEE 802.11ah standard introduces the Restricted Access Window mechanism. This mechanism allows to limit the contention for the channel caused by a large number of stations, simultaneously contending for the channel, by limiting the number of stations, that are allowed to access the channel, and spreading their transmission attempts over the time interval. We are going to ...
Ekaterina Stepanova - Modern Power Save Mechanisms in Wi-Fi Networks
2 ชั่วโมงที่ผ่านมา
Energy efficiency is one of the serious challenges facing wireless networks today. It is important for many types of devices: IoT devices, battery-powered user devices such as smartphones and tablets, and even high-performance devices such as wireless VR headsets. In this talk, firstly we will discuss the basic power save (PS) mechanisms defined in the IEEE 802.11 standard and implemented in th...
Egor Endovitskiy - System-level channel modeling for wireless communication
มุมมอง 54 ชั่วโมงที่ผ่านมา
As wireless communication like 5G and Wi-Fi evolve, new techniques are introduced to improve them. For example, massive and MU-MIMO, NOMA. Questions that arise when those technologies are studied often require a comprehensive channel model, which would implicitly include channel fading and spatial structure. In the seminar, two types of such system-level models will be discussed. The first type...
Aleksey Kureev - Wi-Fi Sensing: Applications, Challenges and Current status
มุมมอง 37 ชั่วโมงที่ผ่านมา
In Wi-Fi Sensing, radio information obtained during signal processing in Wi-Fi receivers is used to detect environmental changes caused by the motion of objects, pets, and people. Using one or multiple collaborating Wi-Fi devices to sense the environment and detect motion has many benefits and enables many new business opportunities. Network providers can utilize information made available thro...
Nikola Zlatanov - Сommunications theory in machine learning and blockchain
มุมมอง 89 ชั่วโมงที่ผ่านมา
In this talk, we will present two applications of the communications theory framework, one in machine learning and the other in blockchain technologies. Specifically, we will present how the problem of classification can be represented equivalently as a communications problem. This equivalent representation can enable the vast body of knowledge and intuition from communications and information ...
Dmitry Bankov - MCS Allocation in Heterogeneous LoRaWAN Networks
มุมมอง 612 ชั่วโมงที่ผ่านมา
LPWAN technologies play a significant role in the implementation of wireless sensor networks and of the Internet of Things. Out of all LPWAN technologies, LoRaWAN has gained the highest popularity among scientists and engineers. A very important peculiarity of LoRaWAN is that it uses a small set of modulation and coding schemes (MCSs) which are almost orthogonal to each other. This property of ...
Evgeny Khorov - Still open issues in Wi-Fi 6
มุมมอง 2014 ชั่วโมงที่ผ่านมา
According to the Cisco Visual Networking Index, Wi-Fi is the most popular Internet access technology which serves over half of global traffic. In the talk, we will focus on the recently released IEEE 802.11 ax standard aka Wi-Fi 6. After a brief introduction to the novelties of Wi-Fi 6, we will discuss peculiarities of resource allocation in Wi-Fi 6 networks and show how they modify the classic...
Evgeny Khorov - Future Wi-Fi at a Glance
มุมมอง 1316 ชั่วโมงที่ผ่านมา
Wi-Fi networks have become a commodity such as running water, electricity, and cars. Today Wi-Fi accounts for half of all user traffic. Although this happens almost imperceptibly for most users, without rebranding, as in cellular systems, the Wi-Fi technology is rapidly evolving to satisfy new and ever-increasing requirements. The talk will discuss new amendments to the Wi-Fi standard that have...
Vyacheslav Loginov - The coexistence of Wi-Fi and cellular networks in unlicensed bands
มุมมอง 719 ชั่วโมงที่ผ่านมา
In order to increase the throughput of cellular networks, a number of technologies (e.g., LTE-LAA, NR-U) have been developed. These technologies allow cellular base stations to transmit data in unlicensed bands in the 5 GHz frequency range. Since these bands are already used by Wi-Fi networks, LTE-LAA/NR-U networks use channel access method for unlicensed bands that has much in common with the ...
Demo: Feasibility of Simultaneous Transmit and Receive in Wi-Fi 7 Multi-Link Devices
มุมมอง 3562 ปีที่แล้ว
Multi-link operation (MLO) is a key feature of Wi-Fi 7, which is currently under development. MLO improves throughput and latency by allowing two devices to establish multiple links between them. The maximal gains are achieved when the links do not interfere, and the devices can use them independently. Otherwise, inter-channel interference prevents successful frame reception. In this case, the ...
Analyses of NSTR Multi-link Operation in the Presence of Legacy Devices in an IEEE 802.11be Network
มุมมอง 6583 ปีที่แล้ว
This video is a version of a talk given at the IEEE CSCN conference. See the paper at cscn2021.ieee-cscn.org/program/ or www.edas.info/showManuscript.php?m=1570774946&ext=pdf&type=stamped. Abstract: The upcoming IEEE 802.11be standard, aka Wi-Fi 7, introduces native support for the multilink operation. It allows Wi-Fi 7 devices to use several links located at different frequency channels simult...
FIND: an SDR-based Tool for Fine Indoor Localization - Demo at IEEE INFOCOM 2021
มุมมอง 3283 ปีที่แล้ว
An indoor localization approach uses Wi-Fi Access Points (APs) to estimate the Direction of Arrival (DoA) of the Wi-Fi signals. This paper demonstrates FIND, a tool for Fine INDoor localization based on a software-defined radio, which receives Wi-Fi frames in the 80 MHz band with four antennas. To the best of our knowledge, it is the first-ever prototype that extracts from such frames data in b...
Prototyping NOMA Constellation Rotation in Wi-Fi (full version)
มุมมอง 2124 ปีที่แล้ว
Demonstration of the NOMA prototype in Wi-Fi with constellation rotation made by Wireless Networks Lab, IITP. In this demo, we extend our previously designed NOMA Wi-Fi prototype to enable constellation rotation. This feature can combat the phase noise, a detrimental effect for NOMA signals. We experimentally study constellation rotation and prove that it makes NOMA signal reception more robust...
Prototyping NOMA Constellation Rotation in Wi-Fi (trailer)
มุมมอง 614 ปีที่แล้ว
Demonstration of the NOMA prototype in Wi-Fi with constellation rotation made by Wireless Networks Lab, IITP. In this demo, we extend our previously designed NOMA Wi-Fi prototype to enable constellation rotation. This feature can combat the phase noise, a detrimental effect for NOMA signal. We experimentally study constellation rotation and prove that it makes NOMA signal reception more robust ...
Video Streaming with the First-ever NOMA over Wi-Fi Prototype
มุมมอง 2495 ปีที่แล้ว
Video Streaming with the First-ever NOMA over Wi-Fi Prototype