Results 21 to 30 of about 17,516 (252)

Analysing digital predistortion technique for computation‐efficient power amplifier linearisation in the presence of measurement noise

open access: yesIET Science, Measurement & Technology, 2021
The noise is an inherent part of a transceiver system, which becomes more severe on low‐cost systems. The power amplifier (PA) further enhances this noise and the signal to be propagated to the receiver. The conventional approach of digital predistortion
Girish Chandra Tripathi, Meenakshi Rawat
doaj   +1 more source

Multiband Antennas for SDR Applications [PDF]

open access: yesInternational Journal of Digital Multimedia Broadcasting, 2009
We present multiband antennas configurations for SDR applications. Using a composite folded dipole structure as starting point, we derived more complex antenna configurations to support multiple communication protocols for mobile application with linear and circular polarizations.
Emanoil Surducan   +3 more
openaire   +2 more sources

GNSS-ISE: Instruction Set Extension for GNSS Baseband Processing

open access: yesSensors, 2020
This work presents the results of research toward designing an instruction set extension dedicated to Global Navigation Satellite System (GNSS) baseband processing.
Krzysztof Marcinek, Witold A. Pleskacz
doaj   +1 more source

Ischaemic Heart Disease: Accuracy of the Prehospital Diagnosis—A Retrospective Study

open access: yesEmergency Medicine International, 2013
Purpose. Correct prehospital diagnosis of ischaemic heart disease (IHD) may accelerate and improve the treatment. We sought to evaluate the accuracy of prehospital diagnoses of ischemic heart diseases assigned by physicians. Methods. The Mobile Emergency
Louise Houlberg Hansen, Søren Mikkelsen
doaj   +1 more source

Implementation of a 3-layer LDM Broadcast System Backward-compatible with ISDB-TB [PDF]

open access: yesRadioengineering, 2021
This paper presents an implementation of a 3-layer transmitter and receiver using Layer Division Multiplexing (LDM), in Software Defined Radio (SDR). The main idea of this work is to show another point of view of the traditional LDM technique that uses ...
R. S. Rabaca, F. Jerji, C. Akamine
doaj  

Performance Analysis of MIMO-OFDM System Using Predistortion Neural Network with Convolutional Coding Addition to Reduce SDR-Based HPA Nonlinearity

open access: yesEmitter: International Journal of Engineering Technology, 2023
In recent years, the development of communication technology has advanced at an accelerated rate. Communication technologies such as 4G, 5G, Wi-Fi 5 (802.11ac), and Wi-Fi 6 (802.11ax) are extensively used today due to their excellent system quality and ...
Melki Mario Gulo   +2 more
doaj   +1 more source

Comparative evaluation of the bond strength of self-adhering and bulk-fill flowable composites to MTA Plus, Dycal, Biodentine, and TheraCal: an in vitro study [PDF]

open access: yesRestorative Dentistry & Endodontics, 2020
ObjectivesThis study aimed to compare the shear bond strength (SBS) of a self-adhering flowable composite (Dyad Flow) and a bulk-fill flowable composite (Smart Dentin Replacement [SDR]) to several pulp-capping materials, including MTA Plus, Dycal ...
Aakrati Raina   +3 more
doaj   +1 more source

Evaluation of soil losses and sediment yield using modified PSIAC model [PDF]

open access: yesIran Agricultural Research, 2022
- One of the big problems today human societies are faced with is the problem of soil erosion. In this study, the "MPSIAC model" was used to estimate sediment yield and provide sediment yield map in Cachoyeh watershed. The MPSIAC method incorporates nine
Abdol Rassoul Zarei, M.J. Amiri
doaj   +1 more source

Gene Expression Profiles for Predicting Metastasis in Breast Cancer: A Cross-Study Comparison of Classification Methods

open access: yesThe Scientific World Journal, 2012
Machine learning has increasingly been used with microarray gene expression data and for the development of classifiers using a variety of methods. However, method comparisons in cross-study datasets are very scarce.
Mark Burton   +3 more
doaj   +1 more source

A novel case of neonatal severe hyperparathyroidism successfully treated with a type II calcimimetic drug

open access: yesBone Reports, 2021
We report a boy with hypercalcemia due to neonatal severe hyperparathyroidism (NSHPT) caused by a compound heterozygous mutation in the calcium sensing receptor (CaSR) managed successfully on a type II calcimimetic drug. The hypercalcemia was temporarily
T.L. Leunbach   +5 more
doaj   +1 more source

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