Results 51 to 60 of about 242 (110)
Data collection in IoT networks: Architecture, solutions, protocols and challenges
IET Wireless Sensor Systems, Volume 14, Issue 4, Page 85-110, August 2024.Current IoT data collection techniques are categorised and a comparative evaluation of these methods is performed based on the topics analysed and elaborated by the authors. In addition, a comprehensive analysis of recent advances in IoT data collection is provided, highlighting different data types and sources, transmission protocols from connected ...
Ado Adamou Abba Ari +6 more
wiley +1 more source
Suitable Spreading Sequences for Asynchronous MC-CDMA Systems
Journal of Telecommunications and Information Technology, 2018 In order to meet the demand of high data rate transmission with good quality maintained, the multi-carrier code division multiple access (MC-CDMA) technology is considered for the next generation wireless communication systems. However, their high crest
Mouad Addad, Ali Djebbari
doaj +1 more source
Sequence optimisation for compressed sensing CDMA MIMO radar via mutual coherence minimisation
IET Radar, Sonar &Navigation, Volume 18, Issue 7, Page 1178-1192, July 2024.The authors focus on optimising waveforms for CDMA‐MIMO radar systems, particularly for Compressed Sensing (CS) based target estimation. The study introduces an optimisation framework to modify phase components of code sequences, aiming to minimise off‐diagonal elements in the Gramian matrix of the sensing matrix.
Saravanan Nagesh +4 more
wiley +1 more source
Spectral Efficiency Comparison of OFDM and MC-CDMA with Carrier Frequency Offset [PDF]
Radioengineering, 2017 Inter-carrier interference and multiple access interference due to carrier frequency offset (CFO) are two major factors that deteriorate the performance of orthogonal frequency division multiple access (OFDMA) and multicarrier code division multiple ...
J. Ahmed
doaj
Blind Identification and Equalization of MC-CDMA Systems Using Higher Order Cumulants
International Journal of Advances in Telecommunications, Electrotechnics, Signals and Systems, 2014 In this work we propose an algorithm based on fourth order cumulants for identification of the linear system (Finite- Impulse Response (FIR)) with Non Minimum Phase (NMP) excited by non-Gaussian sequences, independent identically distributed (i.i.d).
Mohammed Zidane +3 more
doaj +1 more source
Adaptive Algorithms Versus Higher Order Cumulants for Identification and Equalization of MC-CDMA
Journal of Telecommunications and Information Technology, 2014 In this paper, a comparative study between a blind algorithm, based on higher order cumulants, and adaptive algorithms, i.e. Recursive Least Squares (RLS) and Least Mean Squares (LMS) for MultiCarrier Code Division Multiple Access (MC-CDMA) systems ...
Mohammed Zidane +4 more
doaj +1 more source
Sensitivity of Multicarrier Two-Dimensional Spreading Schemes to Synchronization Errors
EURASIP Journal on Wireless Communications and Networking, 2008 This paper presents the impact of synchronization errors on the performance of a downlink multicarrier two-dimensional spreading OFDM-CDMA system. This impact is measured by the degradation of the signal to interference and noise ratio (SINR) obtained ...
Ros Laurent +3 more
doaj +2 more sources
Bandwidth efficiency of MC-CDMA signals
Electronics Letters, 1999 The bandwidth efficiency of MC-CDMA signals is evaluated and compared to that of DS-CDMA signals. For the same available bandwidth, the achievable processing gain of the two systems with and without filtering is evaluated and then compared.
openaire +1 more source
Adaptive TORC detection for MC-CDMA wireless systems
IEEE Transactions on Communications, 2009 Multi carrier code-division multiple access (MC-CDMA) is considered for beyond third generation wireless systems for its effectiveness in the presence of both multipath fading and interference. This paper analyzes MC-CDMA systems adopting an adaptive detection technique based on threshold orthogonality restoring combining (TORC).
Barbara M. Masini, CONTI, Andrea
openaire +3 more sources
Timing Synchronization for Mc-Cdma Systems Using a Time-Multiplexed Synchronization Channel
ASEAN Journal on Science and Technology for Development, 2017 In this paper, we present a synchronization algorithm for Multi-Carrier CDMA (MC-CDMA) systems using a time-multiplexed synchronization channel. The simulations results show that a system using proposed algorithm has much higher timing detection ...
Pham Hong Ky, Nguyen Duc Long
doaj +1 more source