EURASIP Journal on Applied Signal Processing
A novel approach for random interleavers in IDMA system
ICCOM'07 Proceedings of the 11th Conference on 11th WSEAS International Conference on Communications - Volume 11
Proceedings of the 2nd International Conference on Simulation Tools and Techniques
Reverse CDMA link based on noise-like spreading sequences and fading mitigation
Proceedings of the 2009 International Conference on Wireless Communications and Mobile Computing: Connecting the World Wirelessly
Turbo receivers for interleave-division multiple-access systems
IEEE Transactions on Communications
Equal power allocation of IDMA systems: feasibility, optimality, and throughput
IEEE Transactions on Wireless Communications
Multi-rate communications using layered interleave-division multiple access with power allocation
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
Fading mitigation in an interleaved noise-based DS-CDMA system for secure communications
SPPRA '08 Proceedings of the Fifth IASTED International Conference on Signal Processing, Pattern Recognition and Applications
Error rate considerations for a high bit rate DS-SS BPSK dual space diversity RAKE
RWS'10 Proceedings of the 2010 IEEE conference on Radio and wireless symposium
Some considerations of DS-SS BPSK spectral density and error rate of a high bit rate rake
MILCOM'09 Proceedings of the 28th IEEE conference on Military communications
Iterative synchronization of multiuser ultra-wideband signals
IEEE Transactions on Wireless Communications
Fading mitigation in interleaved chaos-based DS-CDMA systems for secure communications
CIT'11 Proceedings of the 5th WSEAS international conference on Communications and information technology
International Journal of Interdisciplinary Telecommunications and Networking
Computers and Electrical Engineering
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The presence of intersymbol interference (ISI), in addition to multiple access interference, severely hampers the performance of a code-division multiple-access (CDMA) communication system. In such a situation, channel coding can be used to obtain better performance, but at the cost of a reduction in rate of flow of information. In this paper, it is shown with the help of simulation results that the chip-interleaved CDMA system effectively combats ISI without requiring additional channel coding. The system differs from the conventional CDMA system in the sense that, the chip sequence resulting from the pseudo noise (PN) sequence modulation is interleaved before transmission. Two receivers are proposed, one based on the turbo equalization method which employs a maximum a posteriori equalizer of exponential complexity and the other based on minimum-mean square error-optimized iterative interference cancellation principles which is of linear complexity. Simulation results are provided which show that error rates close to the no-ISI single-user case can be obtained. The shortcomings of the coded CDMA with turbo detection system in the presence of ISI are also discussed.