2D indoor localization system using FMCW radars and DMTD technique

Kumar, Rupesh; Cousin, Jean-Christophe; Huyart, B.

doi:10.1109/radar.2014.7060365

Cited by 8 publications

(5 citation statements)

References 4 publications

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“…In recent years, with the continuous development of antenna technology and integrated circuits, K‐band millimeter wave radar systems have been widely used in human body monitoring, 1,2 automotive sensing, 3,4 indoor localization, 5 and other fields. As the front end of the radar system, the antenna needs to transmit and receive electromagnetic waves, so the design of the antenna directly affects the performance of the system.…”

Section: Introductionmentioning

confidence: 99%

A 2‐element K‐band series‐fed directional antenna array for millimeter wave radar applications

Xia

Cai

et al. 2021

Int J RF Microw Comput Aided Eng

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In this paper, a K‐band series‐fed directional antenna array based on a wide bandwidth, high‐efficiency electromagnetic radiation structure is proposed for millimeter wave radar applications. Only two fundamental elements are needed to meet design specifications. By cutting off one side of the original antennas and using the grounded coplanar waveguide (CPWG) and microstrip hybrid feeding method, a series‐fed structure is innovatively developed to make the designed array simple in structure and efficient in space utilization. Simultaneously, the feed structure of the CPWG and the through‐hole vias around the antenna are proposed in combination to form a semi‐closed shielded cavity structure. It can better constrain the electric field, suppress radiation from the transmission line, alleviate the antenna radiation pattern distortion and reduce the transmission line loss. The similar beamwidth is mainly achieved in both the E‐ and H ‐planes by placing the two elements vertically perpendicular to the H‐plane. The measured relative bandwidth of the antenna array is 24%. Within the designed bandwidth (22‐28 GHz), the measured |S11| is lower than −10 dB, and the gain is basically above 10 dBi. The measured E‐ and H‐plane beamwidths are close to each other with a difference of less than 10°for each frequency, while the beamwidth value varies between 32°and 51°in the entire frequency band of 22 to 28 GHz. The simulated results are in good agreement with the measured ones.

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Section: Introductionmentioning

confidence: 99%

A 2‐element K‐band series‐fed directional antenna array for millimeter wave radar applications

Xia

Cai

et al. 2021

Int J RF Microw Comput Aided Eng

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show abstract

“…Other UWB navigation solutions with the known position of transmitters are presented in Tiemann and Wietfeld [7], Kaniewski et al [8] and Krishnan et al [9]. It is also worth noting that in Kumar et al [10] a bistatic frequency modulated continuous wave (FMCW) radar is used to localise the active tags indoors. All these methods rely on knowledge of the position of transmitters.…”

Section: Introductionmentioning

confidence: 99%

A novel outlier removal method for two‐dimensional radarodometry

Scannapieco

2019

IET Radar, Sonar & Navigation

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Autonomous navigation of platforms in complex environments has a key role in many applications. However, the environmental conditions could negatively affect the performance of electro-optical sensors. Hence, the idea of using radar odometry has been recently developed. However, it suffers from the presence of outliers in the scene as its electro-optical counterparts. This work presents a method to classify radar echoes as inliers or outliers for two-dimensional radar odometry, based on their range rate and bearing angle. The range rate and bearing angle are in fact combined to give a classification value, different for each target. At each acquisition time, the median of all classification values is computed. Since classification values of stationary targets, i.e. the inliers, cluster around the median, while moving targets, i.e. the outliers, exhibit larger distance from the median, stationary targets and moving targets can be separated. This is also useful for Sense-and-Avoid purposes. The method has been tested in simulated scenario to show effectiveness in detecting outliers and in real case scenario to demonstrate significant improvement in reconstruction of trajectory of platform, keeping the final error around 10% of the travelled distance. Further improvement is envisaged by integrating the method in the target tracking strategy.

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“…Meanwhile, by adjusting the values of the TTDs, we can let the beamforming at the M -th subcarrier f M point to an end angle θ end . Specifically, we set 12), and derive…”

Section: B Utilizing the Beam Squint For Sensingmentioning

confidence: 99%

“…Afterward, the beams from the 0-th subcarrier to the M -th subcarrier will gradually squint from the start angle θ start to the end angle θ end in a controlled way. For subcarrier f m , its beamforming angle θ m still satisfies (12) and can be computed as follows. Substitute θ = θ m ,…”

Section: B Utilizing the Beam Squint For Sensingmentioning

confidence: 99%

“…For example, by processing the pilot signal of the commendations system, the time of arrival (TOA), the time difference of arrival (TDOA), the angle of arrival (AOA), and the angle of departure (AOD), etc., can be extracted to estimate a user's position [8]- [11]. The localization of non-cooperative targets has traditionally been completed based on radar systems [12]- [14].…”

Section: Introductionmentioning

confidence: 99%

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Engineering Mathematics Course in Department of Electrical Engineering at Southern University

Luo¹,

Bhattacharya²

2008 GSW Proceedings

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Engineering Mathematics Course at Electrical Engineering Department of Southern University is a fundamental core engineering course. This core course is taught in a way that shows how the engineering problems in the real world are related to the mathematic problems and how to solve these related engineering problems by adopting different mathematical tools, which is one of the greatest strengths of SU's EE curriculum-and having emphasis on fundamentals about how they apply to real-world problems. There always are very many types of mathematical topics to be covered in this course, and some of them overlap with other classes, such as Laplace Transform, Fourier series and transforms, etc. The main concern in this paper is how to set the materials for whole EE curriculum in engineering mathematics area, which covers most of useful engineering mathematics tools, and at the same time, reduces the overlaps with other EE classes. In other words, in our proposed Engineering Mathematics Course (ENGR 340), we will emphasize some mathematical methods only offered in the E-math course, and cut or reduce the materials which will be taught at other courses to increase students learning efficiency. In this paper, proposed E-math course teaching materials will be given, and some discussion will be provided.

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2D indoor localization system using FMCW radars and DMTD technique

Cited by 8 publications

References 4 publications

A 2‐element K‐band series‐fed directional antenna array for millimeter wave radar applications

A 2‐element K‐band series‐fed directional antenna array for millimeter wave radar applications

A novel outlier removal method for two‐dimensional radarodometry

Engineering Mathematics Course in Department of Electrical Engineering at Southern University

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