Multiuser Detection
Fundamentals of wireless communication
Fundamentals of wireless communication
IEEE Transactions on Communications
Retransmission Diversity in Large CDMA Random Access Systems
IEEE Transactions on Signal Processing - Part I
Multiuser detection for packet-switched CDMA networks with retransmission diversity
IEEE Transactions on Signal Processing
Performance of CDMA random access systems with packet combining in fading channels
IEEE Transactions on Wireless Communications
Random Access with Multi-Packet Reception
IEEE Transactions on Wireless Communications
Spectral efficiency of CDMA with random spreading
IEEE Transactions on Information Theory
Linear multiuser receivers: effective interference, effective bandwidth and user capacity
IEEE Transactions on Information Theory
Capacity of the wireless packet collision channel without feedback
IEEE Transactions on Information Theory
Large system performance of linear multiuser receivers in multipath fading channels
IEEE Transactions on Information Theory
Large-system performance analysis of blind and group-blind multiuser receivers
IEEE Transactions on Information Theory
The throughput of some wireless multiaccess systems
IEEE Transactions on Information Theory
On the asymptotic performance of the decorrelator
IEEE Transactions on Information Theory
Throughput analysis of DS/SSMA unslotted ALOHA system with fixed packet length
IEEE Journal on Selected Areas in Communications
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In this paper, large code division multiple access (CDMA) random access systems employing the decorrelator and minimum mean square error (MMSE) detectors are investigated over Rayleigh fading channels under the assumption that both the number of users and the spreading gain tend to infinity, but their ratio converges to a constant. The signal to interference ratio (SIR) is shown to converge almost surely to a constant and the bit-error rate (BER) is expressed as a function of the traffic load, transmission probability, channel coefficient, and distribution of transmission power. Furthermore, the throughput, the spectrum efficiency, and the stability region are analyzed and simulated. For dominating systems, it is shown that the MMSE detector achieves much higher throughput and spectral efficiency than decorrelator detector. Besides, it is also disclosed that, when the signal to noise ratio (SNR) is larger than an optimum value, the spectrum efficiency increases as the ratio of bit energy to noise power spectrum density (Eb/N0) increases; however, when SNR is smaller than the optimum value, the spectrum efficiency decreases as Eb/N0 increases. For ordinary stable systems, it is demonstrated that their stability region gets narrower as the traffic load increases. Copyright © 2010 John Wiley & Sons, Ltd.