Analysis of radio downlink in Social XR scenarios involving 5G channel state information acquisition techniques

The Fifth Generation (5G) of mobile networks exploit both sub-6 GHz and millimeter-wave (mmWave) spectrum. The sub-6 GHz spectrum comprises frequencies up to 6 GHz and provides large geographical coverage for radio signal in 5G. The mm-wave spectrum on the other hand, comprises higher frequencies ranging from 24 GHz -100 GHz and plays a major...

Delay Estimation for Ranging and Localization Using Multiband Channel State Information

In wireless networks, an essential step for precise range-based localization is the high-resolution estimation of multipath channel delays. The resolution of traditional delay estimation algorithms is inversely proportional to the bandwidth of the training signals used for channel probing. Considering that typical training signals have...

WiFi Indoor Localization Using Channel State Information

Indoor positioning has several variants as a result of multiple years of study on the topic. Using WiFi signals as the technology to compute the position of the target device is one of the most extended and researched techniques. WiFi Access Points are extensively deployed in all indoor environments where WiFi indoor localization has a potential...

Inversion of Multifrequency Data With the Cross-Correlated Contrast Source Inversion Method

Cross-correlated contrast source inversion (CC-CSI) is a nonlinear iterative inversion method that is proposed recently for solving the inverse scattering problems. In CC-CSI, a cross-correlated error is constructed and introduced to the cost functional, which improves the inversion ability when compared to the classical design of the cost...

Time-resolved gamma spectroscopy of single events

In this article we present a method of characterizing scintillating materials by digitization of each individual scintillation pulse followed by digital signal processing. With this technique it is possible to measure the pulse shape and the energy of an absorbed gamma photon on an event-by-event basis. In contrast to time-correlated single...

CSI-EPT: Towards practical implementation

The information of electrical properties of biological tissues within human body can be useful information for diagnosis, tissue characterization, hyperthermia treatment planning and MR safety control.<br/>CSI-EPT is an MR base imaging modality, which reconstructs the electrical properties of the sample. However, this method have not been...

Transceive Phase Corrected Contrast Source Inversion-Electrical Properties Tomography

Electrical properties tomography is the quantification of the conductivity and permittivity of different materials. In an MRI setting this can be used to map the electrical properties of tissue. These values can be used as a different contrast mechanism, for hyperthermia treatment or the improvement of antenna design for specific applications....

Cross-Correlated Contrast Source Inversion

In this paper, we improved the performance of the contrast source inversion (CSI) method by incorporating a so-called cross-correlated cost functional, which interrelates the state error and the data error in the measurement domain. The proposed method is referred to as the cross-correlated CSI. It enables better robustness and higher inversion...

Three-Dimensional Contrast Source Inversion-Electrical Properties Tomography: 3D CSI-EPT

The electrical properties (EPs) conductivity and permittivity of biological tissue inside the human body provide diagnostic information of those tissues. This allows differentiation between tumors and healthy tissue and quantification of the specific absorption rate (SAR) of the tissues. Visualizing the EPs based on measurable magnetic radio...

B1-based SAR reconstruction using contrast source inversion–electric properties tomography (CSI-EPT)

Specific absorption rate (SAR) assessment is essential for safety purposes during MR acquisition. Online SAR assessment is not trivial and requires, in addition, knowledge of the electric tissue properties and the electric fields in the human anatomy. In this study, the potential of the recently developed CSI-EPT method to reconstruct SAR...

Design of a gesture controlled graphic interface for Head mounted Displays for CSI The Hague

In this project an HMD (head mounted display) is used to display augmented reality in 3D using a separate screen for each eye. Two cameras map the entire crime scene in 3D using state-of-the-art mapping and tracking software which is being developed at the TU Delft. This tool enables the forensic researcher to use built in tools such as thermal...