Results 41 to 50 of about 18,357,996 (200)

Multi-code Multicarrier CDMA: Performance Analysis

Journal of Communications Software and Systems, 2006
A new multi-code multicarrier code division multiple access (MC-MC-CDMA) system is proposed and analyzed in afrequency selective fading channel. By allowing each user to transmit an M-ary code sequence, the proposed MC-MC-CDMA system can support various ...
Taeyoon Kim, Jeffrey G. Andrews, Jaeweon Kim, Theodore S. Rappaport   +3 more
doaj  

Design of a Baseband Transceiver for Multicarrier CDMA Communications

EURASIP Journal on Advances in Signal Processing, 2005
Multicarrier systems have become popular for their spectral efficiency and robustness against frequency-selective fading. Multicarrier code-division multiple access (MC-CDMA) is a technique that combines the advantage of multicarrier modulation with ...
Tsai Pei-Yun, Kang Hsin-Yu, Chiueh Tzi-Dar   +2 more
doaj   +1 more source

Impact of magnetic fields from tablets, laptops, smartphones, and household/leisure magnets on cardiac implantable electronic devices

Journal of Arrhythmia, Volume 41, Issue 4, August 2025.
This study on 13 Cardiac implantable electronic device (CIED) models revealed that surface magnetic fields of tablets, laptops, smartphones, and household magnets exceeded 10 G, potentially triggering magnet response mode. Activation occurred at ≤15 mm for electronic devices and ≤7 mm for household magnets.
Norio Kamitani, Aya Miyazaki, Satoko Tomida, Keita Shimizu, Nodoka Ohira, Keisyun Kondo, Hiromichi Miura, Daishi Koyama, Shigehiko Tominaga, Ryuta Henmi, Ryo Sugiura, Hiroshi Masui   +11 more
wiley   +1 more source

Wireless Power and Data Transfer Technologies for Flexible Bionic and Bioelectronic Interfaces: Materials and Applications

Advanced Materials Technologies, Volume 10, Issue 5, March 4, 2025.
This paper reviews the state‐of‐the‐art and recent advances in bio‐integrated wireless power and data transfer technologies for flexible bionics, wearable and implantable bioelectronics. The architectures, operating principles, materials, and application technologies are presented in detail.
Massimo Mariello, Christopher M. Proctor
wiley   +1 more source

Decision-aided-based multiple blind PN code estimation algorithm of asynchronous CDMA signal

Tongxin xuebao, 2020
Aiming at the problem of blind estimation of multi-user pseudo-code of multi-path asynchronous code division multiple access (CDMA) signal,using the finite element (FA) characteristic of transmitted symbol,a decision aid (DA) method based on maximum ...
Zhaoyang QIU, Tianyun LI, Xiangming CHEN
doaj   +2 more sources

Spreading Code Assignment Strategies for MIMO-CDMA Systems Operating in Frequency-Selective Channels

EURASIP Journal on Wireless Communications and Networking, 2009
Code Division Multiple Access (CDMA) and multiple input multiple output- (MIMO-) CDMA systems suffer from multiple access interference (MAI) which limits the spectral efficiency of these systems.
Claude D'Amours, Adel Omar Dahmane   +1 more
doaj   +2 more sources

Prediction of Central Post‐Stroke Pain by Quantitative Sensory Testing

Annals of Neurology, Volume 97, Issue 3, Page 507-520, March 2025.
Objective Among patients with acute stroke, we aimed to identify those who will later develop central post‐stroke pain (CPSP) versus those who will not (non‐pain sensory stroke [NPSS]) by assessing potential differences in somatosensory profile patterns and evaluating their potential as predictors of CPSP. Methods In a prospective longitudinal study on
Susanna Asseyer, Eleni Panagoulas, Jana Maidhof, Kersten Villringer, Esra Al, Xiuhui Chen, Thomas Krause, Samyogita Hardikar, Arno Villringer, Gerhard Jan Jungehülsing   +9 more
wiley   +1 more source

Stepped-Frequency Doppler-Coded Integrated Joint Division Multiple Access Waveform for High-Precision Traffic MIMO Radar

Remote Sensing
Slow-time coding techniques, including Code Division Multiple Access (CDMA), Doppler Division Multiple Access (DDMA), and joint CDMA–DDMA coding, are widely used in Multiple-Input Multiple-Output (MIMO) millimeter-wave radar systems to improve transmit ...
Jianhu Liu, Canyu Wang, Xiaoyuan Ren, Libing Jiang, Zhuang Wang   +4 more
doaj   +1 more source

Contribution to Synchronization and Tracking Modelisation in a CDMA Receiver

Journal of Engineering, 2013
We propose and analyze a noncoherent receiver with PN code tracking for direct sequence code division multiple access (DS-CDMA) communication systems. We employ the delay-lock loop (DLL) architectures for the tracking stage.
Aicha Alami Hassani, Mohcine Zouak, Mostafa Mrabti   +2 more
doaj   +1 more source

Energy‐Aware Protocol Design and Evaluation of the PHY Layer in Satellite IoT

International Journal of Satellite Communications and Networking, Volume 43, Issue 2, Page 61-76, March/April 2025.
ABSTRACT Direct‐to‐satellite communication for the Internet of Things (IoT) has attracted significant interest from both the scientific community and major telecommunications players. The integration of satellite connectivity in smartphones and IoT devices promises a transformative impact on critical applications such as environmental monitoring, asset
Simon Heine, Christian A. Hofmann, Andreas Knopp   +2 more
wiley   +1 more source