Results 161 to 170 of about 7,178 (195)
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Beam-forming for MC-CDMA systems
The 2002 45th Midwest Symposium on Circuits and Systems, 2002. MWSCAS-2002., 2003In this paper, the use of adaptive antenna arrays for MC-CDMA systems in an interference-dominated environment is investigated. We present two different beam-forming approaches, namely, frequency domain and time domain beam-forming. Beam-forming performance over different channel conditions such as flat fading, frequency selective fading, low and high ...
R. Venkatasubramanian +2 more
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Adaptive beamforming for MC-CDMA systems
International Journal of Mobile Network Design and Innovation, 2010A novel beamforming algorithm is proposed for MC-CDMA systems under time varying channel conditions to suppress the interference in the presence of strong interferers. An iterative algorithm which computes the beamforming weight vectors is presented in this paper.
Alamelu Nachiappan, P. Dananjayan
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Wavelet-based MC-CDMA cellular systems
2000 IEEE Sixth International Symposium on Spread Spectrum Techniques and Applications. ISSTA 2000. Proceedings (Cat. No.00TH8536), 2002This paper presents work carried out on a multi-carrier code division multiple access (MC-CDMA) for a down-link cellular radio systems. The MC-CDMA system carries out energy spreading in all available sub-channels or in the frequency domain. It also performs multi-carrier modulation using a set of orthogonal (or biorthogonal) filters.
A. Muayyadi, M.N.A. Abu-Rgheff
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Performance analysis of MC-CDMA system
2012 1st International Conference on Recent Advances in Information Technology (RAIT), 2012To achieve high data rate Multi-Carrier Code Division Multiple Access (MC-CDMA) is one suitable choice for next generation wireless communication system. MC-CDMA is the combination of CDMA and OFDM schemes, resulting into getting the advantages of both the schemes.
Madhvi Jangalwa, Vrinda Tokekar
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Capacity optimisation in MC‐CDMA systems
European Transactions on Telecommunications, 2002AbstractA novel efficient algorithm is proposed for the optimisation of capacity assignment in a MC‐CDMA system with an additional frequency division multiplexing component. Based on an estimate of the frequency‐selective channel, the algorithm optimises the assignment of the sub‐bands to the users with respect to the overall system capacity. Moreover,
Elena Costa +3 more
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Modified PIC in MC-CDMA systems
First International Symposium on Control, Communications and Signal Processing, 2004., 2004In this paper, we propose a modified parallel interference cancellation (PIC) approach for MC-CDMA systems. Compared with conventional PIC, modified PIC can improve BER performance at lower number of subchannels in both downlink and uplink channels and has the same performance as conventional PIC when the number of subchannels is sufficiently large ...
Z. Duan +3 more
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Combined partial equalization for MC-CDMA wireless systems
IEEE Communications Letters, 2009We analyze a combined equalization technique for multi carrier-code division multiple access (MC-CDMA) systems which consists in performing both pre-equalization at the transmitter and post-equalization at the receiver. In particular, a parametric partial equalization (PE) technique is considered at both sides, and we derive a generalized analytical ...
Masini B. M., CONTI, Andrea
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Performance Analysis and Comparison of Coded FH/MC-CDMA and MC-CDMA Communication System
2007 IEEE 18th International Symposium on Personal, Indoor and Mobile Radio Communications, 2007In this paper, we will combine the frequency hopping (FH) and the multi-carrier code division multiple access scheme (MC-CDMA) through an internal coding. The total bandwidth will be divided to a number of sub-bands with equal bandwidth. In each signalling interval, the output of a super orthogonal encoder selects one of the sub-bands for data ...
Sanaz Barghi, Masoumeh Nasiri-Kenari
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ICA detection for MC-CDMA systems
2012 International Symposium on Intelligent Signal Processing and Communications Systems, 2012The multicarrier code division multiple access (MC-CDMA) technique has received considerable attention due to its high data rate for future wireless communication systems. A common problem to multiuser MC-CDMA detectors under Rayleigh fading channels is that the performance is very sensitive to the signature waveform mismatch (SWM) induced by channel ...
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Intercell Interference Cancellation for MC-CDMA Systems
2007 IEEE 65th Vehicular Technology Conference - VTC2007-Spring, 2007This article considers the problem of intercellular interference cancellation for downlink MC-CDMA systems. Throughout this work, we mainly focus on parallel interference cancellation (PIC) techniques due to the low latency they present. After deriving a version of a classical PIC receiver, suitably tuned to take into account the intercellular ...
Xenofon G. Doukopoulos +1 more
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