DOA and TOA Based Localization Services Protocol in IEEE 802.11 Networks

Neri, Alessandro; Nepi, A. Di; Vegni, Anna Maria

doi:10.1007/s11277-009-9719-y

Cited by 12 publications

(9 citation statements)

References 11 publications

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“…In this paper, we adopt DOA-based location detection technology and RSSI power detection technology [16][17][18] for the physical layer, and we assume that the default transmission power of all nodes is the same and known (the power is negotiated in during the association process). DOA and RSSI functionalities can be implemented by updating the firmware of software.…”

Section: Phy Designmentioning

confidence: 99%

Enabling Sector Scheduling for 5G-CPE Dense Networks

Yang

Feng

Jin

et al. 2020

Security and Communication Networks

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5G customer premise equipment (5G-CPE) is an IoT gateway technology that integrates 5G and Wi-Fi and therefore can provide Wi-Fi connection for IoT devices and meanwhile benefit from the advantages of 5G. With the increasing number of IoT devices, transmission collisions and hidden/exposed terminal problems on the Wi-Fi connection side become more and more serious. Conventional mechanisms cannot solve these problems well. In this paper, we propose a Wi-Fi sector (Wi-FiS) design, which is compatible with Wi-Fi, to solve them fundamentally. Wi-FiS divides the whole coverage area of Wi-Fi into multiple sectors and utilizes beamforming technology and sector-based scheduling to improve system performance of Wi-Fi dense networks. For a single-cell network, Wi-FiS differentiates uplink and downlink operations and totally excludes collision in downlink. For a multicell network, Wi-FiS can avoid hidden and exposed terminal problems, while enabling parallel transmissions among multiple cells. We then develop a theoretical model to analyze Wi-FiS’s throughput. Extensive simulations verify that our theoretical model is very accurate and Wi-FiS can improve system throughput of Wi-Fi dense networks significantly.

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Section: Phy Designmentioning

confidence: 99%

Enabling Sector Scheduling for 5G-CPE Dense Networks

Yang

Feng

Jin

et al. 2020

Security and Communication Networks

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“…Figure 2. Scale, Output, Measurements and Roles (Kjaergaard [2], Sun et al, [6], Raviv et al, [7], Savarese et al, [8], Gavrila et al, [9], Rohrmus [10], Liapis et al, [11], Post et al, [12], Blake et al, [13], Aponte et al, [14], Neri et al, [15], Manodham et al, [16], Norouzi et al, [17], Aktas et al, [18]) Figure 2 displays the four (4) factors necessitating identification, which are scale, measurement, output and roles. Scale refers to the size of a system's deployment, which is essential as it affects data collection and the scale constraints of certain systems due to particular assumptions.…”

Section: General Taxonmentioning

confidence: 99%

Ubiquitous Positioning: A Taxonomy for Location Determination on Mobile Navigation System

Bejuri¹,

Mohamad²,

Sapri³

2011

SIPIJ

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The location determination in obstructed area can be very challenging especially if Global Positioning System are blocked. Users will find it difficult to navigate directly on-site in such condition, especially indoor car park lot or obstructed environment. Sometimes, it needs to combine with other sensors and positioning methods in order to determine the location with more intelligent, reliable and ubiquity. By using ubiquitous positioning in mobile navigation system, it is a promising ubiquitous location technique in a mobile phone since as it is a familiar personal electronic device for many people. However, there is an increasing need for better development of proposed ubiquitous positioning systems. System developers are also lacking of good frameworks for understanding different options during building ubiquitous positioning systems. This paper proposes taxonomy to address both of these problems. The proposed taxonomy has been constructed from a literature study of papers and articles on positioning estimation that can be used to determine location everywhere on mobile navigation system. For researchers the taxonomy can also be used as an aid for scoping out future research in the area of ubiquitous positioning.

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“…Due to the multicarriers, one of OFDM's advantages is that it can combat frequencyselective fading and narrowband interference, ensuring its application in high-speed data transmission fields [2]. Now, OFDM has been widely applied in IEEE 802.11 wireless local area network, the next generation mobile communication, and digital video broadcasting (DVB) [3][4][5]. In addition to data service, OFDM systems also provide users with location-based service.…”

Section: Introductionmentioning

confidence: 99%

A Novel Method for DOA and Time Delay Joint Estimation in Multipath OFDM Environment

Cui

et al. 2020

International Journal of Antennas and Propagation

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Joint time delay and direction of arrival estimation based on uniform linear arrays in Orthogonal Frequency Division Multiplexing (OFDM) systems has to face the problems posed by coherent multipath environments and high computational complexity. In this paper, a novel fast method is proposed to achieve a joint direction-of-arrival (DOA) and time-dealy (TD) estimation of multipath OFDM signals by fully using space-frequency characteristics. Firstly, we construct an extended virtual array by combining the array structure and frequency-domain information. Then, we calculate the extended channel frequency response matrix and adopt smoothing processing to eliminate the multipath effect. Next, we get the result of DOA estimation by using a closed-form solution, which costs little complexity and can achieve fast estimation. Finally, we conduct a one-dimensional spectral search using the obtained DOA values to estimate time delays. Simulation results show that our proposed methods have excellent performance even under low SNR conditions in different multipath environments. Furthermore, methods proposed in this paper have much less computational complexity and better estimation performance compared with the multidimensional spectral peak search methods.

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DOA and TOA Based Localization Services Protocol in IEEE 802.11 Networks

Cited by 12 publications

References 11 publications

Enabling Sector Scheduling for 5G-CPE Dense Networks

Enabling Sector Scheduling for 5G-CPE Dense Networks

Ubiquitous Positioning: A Taxonomy for Location Determination on Mobile Navigation System

A Novel Method for DOA and Time Delay Joint Estimation in Multipath OFDM Environment

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