Results 51 to 60 of about 1,077 (174)

Adaptive Transmitter Precoding for Time Division Duplex CDMA in Fading Multipath Channels: Strategy and Analysis

open access: yesEURASIP Journal on Advances in Signal Processing, 2002
The recently developed blind adaptive techniques for multiuser detection in code division multiple access (CDMA) systems offer an attractive compromise of performance and complexity.
Høst-Madsen Anders   +2 more
doaj   +1 more source

Internet of Things in Healthcare Research: Trends, Innovations, Security Considerations, Challenges and Future Strategy

open access: yesInternational Journal of Intelligent Systems, Volume 2025, Issue 1, 2025.
The Internet of Things (IoT) has become a transformative force across various sectors, including healthcare, offering new opportunities for automation and enhanced service delivery. The evolving architecture of the IoT presents significant challenges in establishing a comprehensive cyber‐physical framework. This paper reviews recent advancements in IoT‐
Attiq Ur Rehman   +11 more
wiley   +1 more source

Dynamic and efficient device collaborations in 5G‐advanced and 6G networks

open access: yesIET Communications, Volume 18, Issue 19, Page 1437-1450, December 2024.
Collaborative transmission, comprising multiple devices owned by a single user, is progressively evolving into an essential strategy to meet the stringent demands of burgeoning collaborative scenarios in 5G‐advanced and 6G networks. This paper proposes three novel use cases for device collaboration, namely data duplication, data splitting and wireless ...
Xianghui Han   +5 more
wiley   +1 more source

Time transfer via single‐record TDoA measurements of GNSS satellites using direct cross‐correlation and relative pilot code phases

open access: yesIET Radar, Sonar &Navigation, Volume 18, Issue 12, Page 2447-2453, December 2024.
A method is presented to passively synchronise data records via GNSS raw signals in a single record requiring only a GNSS antenna, an analogue‐to‐digital converter and computation hardware. The clock bias is estimated via the common view method with either full raw signal correlation or software‐based code correlation of individual signals from the GPS,
Erik Busley   +3 more
wiley   +1 more source

Bit Error Rate Performance of a MIMO-CDMA System Employing Parity-Bit-Selected Spreading in Frequency Nonselective Rayleigh Fading

open access: yesInternational Journal of Antennas and Propagation, 2011
We analytically derive the upper bound for the bit error rate (BER) performance of a single user multiple input multiple output code division multiple access (MIMO-CDMA) system employing parity-bit-selected spreading in slowly varying, flat Rayleigh ...
Claude D'Amours, Adel Omar Dahmane
doaj   +1 more source

Theoretical Investigation into Spectral Coexistence of CDMA and TDMA Systems

open access: yesThe Journal of Engineering Research, 2008
The scarcity of available radio spectrum presently limits the extension of modern multimedia systems. This paper presents a theoretical investigation into the possibility of using a frequency overlay of a narrowband Code Division Multiple Access (CDMA ...
A.M. Abbosh, M. A. Shehathah
doaj   +1 more source

The Kalman Filtering Blind Adaptive Multi-user Detector Based on Tracking Algorithm of Signal Subspace

open access: yesInformation, 2015
Multi-user detection is an effective method to reduce multiple access interference in code division multiple access (CDMA) systems. This paper discusses a signal subspace based blind adaptive multiuser detector and a Kalman filtering blind adaptive ...
Liqing Zhou   +5 more
doaj   +1 more source

Spectral-amplitude encoding CDMA system based on high-speed electronic encoder/ decoder structures

open access: yesRevista Facultad de Ingeniería Universidad de Antioquia, 2016
A new method for high-speed Code Division Multiple Access (CDMA) systems that lies on the analogue performance of distributed-based transversal filters is proposed.
Jorge Aguilar-Torrentera   +3 more
doaj   +1 more source

Compensation of Fading Channels Using Partial Combining Equalizer in MC-CDMA Systems

open access: yesJournal of Telecommunications and Information Technology, 2017
In this paper the performance of a partial combining equalizer for Multi-Carrier Code Division Multiple Access (MC-CDMA) systems is analytically and numerically evaluated. In the part of channel identification, authors propose a blind algorithm based on
Mohammed Zidane   +2 more
doaj   +1 more source

Color-Shift Keying and Code-Division Multiple-Access Transmission for RGB-LED Visible Light Communications Using Mobile Phone Camera

open access: yesIEEE Photonics Journal, 2014
Light-emitting diodes (LEDs) have been deployed for various applications in our daily lives. Similarly, image sensors or cameras integrated into mobile phones have become common. Hence, visible light communication (VLC) using LED and mobile phone cameras
Shih-Hao Chen, Chi-Wai Chow
doaj   +1 more source

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