It is widely <span>admitted that the estimation of ultra wide band (UWB) time-of-arrival (TOA) for multiple targets in indoor multipath channels a very challenging task. The existing algorithms deal with limited number and require complex exchange several messages. In this paper, novel TOA algorithm developed. proposed estimates first path (FP) without exchanging messages or using collisi...

This work combines compressive sensing and short word-length techniques to achieve localization target tracking in wireless sensor networks with energy-efficient communication between the network anchors fusion center. Gradient descent is performed using time-of-arrival (TOA) data which are indicative of distance thereby achieving range-based localization. The considered delta modulation sigma-...

This study modeled the interference between Lora system signal in AS2 frequency band and a non-Lora radio signal. Two devices operate on uplink downlink at of 923.2MHz to send receive data bandwidth 125KHz, 250KHz, 500KHz. The generator device is composed single board computer installed by RPITX application. In addition, there GNU-Radio application monitor transmission levels. Signal quality te...

To exploit the capacity and performance gains associated with the use of antenna arrays, wireless communication systems require proper understanding of the spatial characteristics of the channel. Scattering models provide both Angle of Arrival (AoA) and Time of Arrival (ToA) statistics of the channel. In this paper, we investigate geometrically based single bounce model that assumes that multip...

In this paper, we propose an efficient hybrid location algorithm with BP neural networks. We choose two-layer backpropagation network for data fusions and position estimation to improve hybrid location accuracy and efficiency with TOA/TDOA/AOA parameters in mobile communication networks. So the position estimation can be optimized by network parallel processing robustly, and the inaccuracy or f...

This paper presents a new algorithm for the deinterleaving of radar signals, based on the direction of arrival (DOA), carrier frequency (RF), and time of arrival (TOA). The algorithm is applied to classic (constant), jitter, staggered, and dwell switch pulse repetition interval (PRI) signals. This algorithm consists of two stages. In the first stage, a Kohonen neural network clusters the receiv...

Background Identifying factors that confer resilience to developing delirium is critical given the negative impact of on clinical care and risk for mortality. Here, we investigated a cohort cognitively normal older adults undergoing elective surgery examined role pre-operative memory function cortical thickness in incidence severity post-operative (POD). We hypothesized 1) those with episodic c...

In recent years, more and more wireless communications systems are required to provide also a positioning measurement. In code division multiple access (CDMA) communication systems, the positioning accuracy is significantly degraded by the multiple access interference (MAI) caused by other users in the system. This MAI is commonly managed by a power control mechanism, and yet, MAI has a major e...

Wireless video capsule endoscopy has been in use for over a decade and it uses radio frequency (RF) signals to transmit approximately fifty five thousands clear pictures of inside the GI tract to the body-mounted sensor array. However, physician has no clue on the exact location of the capsule inside the GI tract to associate it with the pictures showing abnormalities such as bleeding or tumors...

Lack of calibrated radiation measurements at the top of the atmosphere (TOA) between major spaceborne radiation missions entails inference of the TOA radiation budget from operational weather sensors. The inferred data are subject to uncertainties due to calibration, narrowto broadband conversion, etc. In this study, a surrogate TOA earth radiation budget product generated from GOES-7 (Geostati...