Results 31 to 40 of about 5,452 (173)
Coherent and Differential Downlink Space-Time Steering Aided Generalised Multicarrier DS-CDMA
, 2007 This paper presents a generalised MultiCarrier Direct Sequence Code Division Multiple Access (MC DS-CDMA) system invoking smart antennas for improving the achievable performance in the downlink.
El-Hajjar, Mohammed +3 more
core +1 more source
A genetic algorithm-assisted semi-adaptive MMSE multi-user detection for MC-CDMA mobile communication systems [PDF]
, 2006 In this work, a novel Minimum-Mean Squared-Error (MMSE) multi-user detector is proposed for MC-CDMA transmission systems working over mobile radio channels characterized by time-varying multipath fading.
C. Sacchi +4 more
core +1 more source
Wireless Communications and Mobile Computing, Volume 2018, Issue 1, 2018., 2018 This study proposes an iterative, joint channel estimation, equalization, and data detection method in the presence of high mobility for a multicarrier downlink system that communicates over rapidly time‐varying channels. The proposed method uses a basis expansion method (BEM) which has low computational complexity and helps to reduce the number of ...
Nihat Kabaoglu +3 more
wiley +1 more source
A Binary Cuckoo Search Big Data Algorithm Applied to Large‐Scale Crew Scheduling Problems
Complexity, Volume 2018, Issue 1, 2018., 2018 The progress of metaheuristic techniques, big data, and the Internet of things generates opportunities to performance improvements in complex industrial systems. This article explores the application of Big Data techniques in the implementation of metaheuristic algorithms with the purpose of applying it to decision‐making in industrial processes.
José García +5 more
wiley +1 more source
A Multiple‐Access Time and Frequency Spectrum‐Spreading Modulation
Wireless Communications and Mobile Computing, Volume 2018, Issue 1, 2018., 2018 In this paper a novel modulation scheme called Carrier Interleaved Multiple Access (CIMA) is proposed. CIMA provides an alternative for multiple‐access modulation accommodating resistance to noise and channel interference. The approach is based on polar signaling modulated with an FM‐like composite sinusoidal function.
Samer S. Saab +3 more
wiley +1 more source
Large Families of Ternary Sequences with Aperiodic Zero Correlation Zone Sequences for a Multi-Carrier DS-CDMA System [PDF]
, 2002 A new method for generating families of ternary spreading sequences is presented. The sequences have aperiodic zero correlation zones and large families are created for a specific sequence length.
Donelan, H., O'Farrell, T.
core
A Tutorial on Nonorthogonal Multiple Access for 5G and Beyond
Wireless Communications and Mobile Computing, Volume 2018, Issue 1, 2018., 2018 Today’s wireless networks allocate radio resources to users based on the orthogonal multiple access (OMA) principle. However, as the number of users increases, OMA based approaches may not meet the stringent emerging requirements including very high spectral efficiency, very low latency, and massive device connectivity.
Mahmoud Aldababsa +5 more
wiley +1 more source
Generalized multicarrier DS-CDMA using various chip waveforms [PDF]
2003 IEEE Wireless Communications and Networking, 2003. WCNC 2003., 2004 In this contribution the family of generalized multicarrier DS-CDMA (MC DS-CDMA) schemes is investigated, when considering time-domain half-sine and raised-cosine chip waveforms, in addition to the rectangular chip waveform. Our results show that for a given subcarrier spacing the particular choice of the chip waveform has a substantial influence on ...
Yang, L-L., Hanzo, L.
openaire +2 more sources
Modified Three‐Dimensional Multicarrier Optical Prime Codes
International Journal of Optics, Volume 2016, Issue 1, 2016., 2016 We propose a mathematical model for novel three‐dimensional multicarrier optical codes in terms of wavelength/time/space based on the prime sequence algorithm. The proposed model has been extensively simulated on MATLAB for prime numbers (P) to analyze the performance of code in terms of autocorrelation and cross‐correlation.
Rajesh Yadav +2 more
wiley +1 more source
, 2005 In this contribution a generalized MC DS-CDMA system invoking smart antennas for improving the achievable performance in the downlink of the system is studied, which is capable of minimizing the downlink interference inflicted upon co-channel mobiles ...
Hanzo, L., Hu, B., Yang, L-L.
core +1 more source