Results 1 - 10 of 1,602

PERFORMANCE ENHANCEMENT OF MC-DS/CDMA SYSTEM USING CHAOTIC SPREADING SEQUENCE

by V. Nagarajan
"... A novel chaotic spreading sequences for multi-carrier direct sequence code division multiple access (MC-DS/CDMA) system is proposed. With this spreading sequence in the MC-DS/CDMA system, the effect of multiple access interference can be mitigated by choosing the spreading sequences with appropriate ..."
Abstract - Cited by 3 (0 self) - Add to MetaCart
A novel chaotic spreading sequences for multi-carrier direct sequence code division multiple access (MC-DS/CDMA) system is proposed. With this spreading sequence in the MC-DS/CDMA system, the effect of multiple access interference can be mitigated by choosing the spreading sequences

Carrier Frequency Offset Estimation Using Hidden Pilots for MC-DS-CDMA Systems

by Xianhua Dai, See Profile, Licheng Liu, Xianhua Dai , 2008
"... Carrier frequency offset estimation using hidden pilots for MC-DS-CDMA systems ..."
Abstract - Add to MetaCart
Carrier frequency offset estimation using hidden pilots for MC-DS-CDMA systems

Relevance of The Asymptotic Reduced-Rank MMSE Detector in MC-DS-CDMA System

by J. Grolleau, E. Grivel, M. Najim
"... Abstract — This paper deals with the design of re-ceivers for uplink quasi-synchronous MC-DS-CDMA systems. Our purpose is twofold. Firstly, we aim at designing a reduced-rank MMSE receiver based on a matrix polynomial expansion of the inverse of the received signal autocorrelation matrix. This recei ..."
Abstract - Add to MetaCart
Abstract — This paper deals with the design of re-ceivers for uplink quasi-synchronous MC-DS-CDMA systems. Our purpose is twofold. Firstly, we aim at designing a reduced-rank MMSE receiver based on a matrix polynomial expansion of the inverse of the received signal autocorrelation matrix

Ant-colony-based multiuser detection for MC DS-CDMA systems

by Chong Xu, Lie-liang Yang, Lajos Hanzo - in Proc. IEEE Vehicular Technology Conf
"... Abstract — In this contribution we present a novel ant colony optimization (ACO) based multi-user detector (MUD) designed for synchronous multi-carrier direct sequence code division multiple access (MC DS-CDMA) systems. The operation of the ACO-based MUD is based on the behaviour of the ant colony i ..."
Abstract - Cited by 7 (4 self) - Add to MetaCart
Abstract — In this contribution we present a novel ant colony optimization (ACO) based multi-user detector (MUD) designed for synchronous multi-carrier direct sequence code division multiple access (MC DS-CDMA) systems. The operation of the ACO-based MUD is based on the behaviour of the ant colony

Result Analysis of Bit-Error Rate (BER) of the MC DS-CDMA System

by Rishi Choubey, Ravi Mohan, Sumit Sharma
"... Multi-Carrier Code Division Multiple Access (MC-CDMA) is a multiple access scheme used in OFDMbased systems, allowing the system to support multiple users at the same time. Multi Carrier modulation has a significant role in mobile communication because of frequency diversity and bandwidth efficiency ..."
Abstract - Add to MetaCart
efficiency. Multi-Carrier Code Division Multiple Access (MC-CDMA) suffers from timing errors due to the large number of carriers. So in this paper we present the Analysis of Bit-Error Rate (BER) of the MC DS-CDMA System under Additive white Gaussian noise (AWGN) and multipath rayleigh fading channel.

Performance Analysis of Generalized MC DS-CDMA System

by Rishi Choubey, Ravi Mohan, Sumit Sharma
"... After studying several researches in the direction of Multicarrier direct sequence-code division multiple access (MC DS-CDMA) which is a novel radio access scheme that combines time domain spreading and multicarrier modulation suffer from the interference among users. This phenomenon is called multi ..."
Abstract - Add to MetaCart
After studying several researches in the direction of Multicarrier direct sequence-code division multiple access (MC DS-CDMA) which is a novel radio access scheme that combines time domain spreading and multicarrier modulation suffer from the interference among users. This phenomenon is called

A GAME THEORETIC POWER CONTROL APPROACH FOR MIMO MC-DS/CDMA SYSTEMS

by V. Nagarajan, P. Dananjayan
"... A major challenge to enhance the performance of multiuser multiple-input multiple-output (MIMO) multi-carrier direct sequence code division multiple access (MC-DS / CDMA) system relies on the effective multiple access interference suppression. In this work a novel distributed non cooperative power c ..."
Abstract - Add to MetaCart
A major challenge to enhance the performance of multiuser multiple-input multiple-output (MIMO) multi-carrier direct sequence code division multiple access (MC-DS / CDMA) system relies on the effective multiple access interference suppression. In this work a novel distributed non cooperative power

Effects of Subcarrier Power Allocation on An Interference Avoidance Code Assignment Strategy for Multi-Rate MC-DS-CDMA Systems

by Chih-wen Chang, Li-chun Wang
"... In this paper, we propose a joint subcarrier power allocation (SPA) and code assignment scheme for the synchronous multi-rate MC-DS-CDMA system with time- and frequency-domain spreading. Based on the newly defined metric, MAI coefficient, the proposed code assignment strategy can quantitatively pred ..."
Abstract - Add to MetaCart
In this paper, we propose a joint subcarrier power allocation (SPA) and code assignment scheme for the synchronous multi-rate MC-DS-CDMA system with time- and frequency-domain spreading. Based on the newly defined metric, MAI coefficient, the proposed code assignment strategy can quantitatively

Adaptive Co-Channel Interference Suppression Technique for Multi-User MIMO MC DS/CDMA Systems

by Prabagarane Nagaradjane, Arvind Sai, Sarathi Vasan, Lakshmi Krishnan , 2009
"... In this paper, an adaptive co-channel interference suppression technique for multi-user MIMO MC DS/CDMA system is envisaged. MC DS/CDMA offers many advantages like flexibility, robustness, low PAPR and spectral efficiency. In spite of these advantages, performance of MC DS/CDMA system is greatly imp ..."
Abstract - Add to MetaCart
In this paper, an adaptive co-channel interference suppression technique for multi-user MIMO MC DS/CDMA system is envisaged. MC DS/CDMA offers many advantages like flexibility, robustness, low PAPR and spectral efficiency. In spite of these advantages, performance of MC DS/CDMA system is greatly

BER PERFORMANCE DEGRADATION OF MC-DS-CDMA SYSTEMS JOINTLY AFFECTED BY TRANSMITTER HPA AND RECEIVER CFO IN FREQUENCY SELECTIVE FADING CHANNELS

by Paolo Banelli, Luca Rugini
"... Multicarrier systems are highly sensitive to the intermodulation distortion (IMD) introduced by high-power amplifiers (HPA) at the transmitter and to the intercarrier interference (ICI) due to a carrier frequency offset (CFO) at the receiver. We analyze the bit-error rate (BER) degradation induced b ..."
Abstract - Add to MetaCart
by these impairments in the downlink of a multicarrier direct-sequence code-division multiple-access (MC-DS-CDMA) systems in frequency-selective Rayleigh fading channels. 1.
Results 1 - 10 of 1,602