New results for probability of error performance in MMSE multiuser detection for CDMA
Digital Signal Processing
Performance analysis of non-data aided SBIB receivers for CDMA systems
Signal Processing
Computers and Electrical Engineering
Power control and capacity of spread spectrum wireless networks
Automatica (Journal of IFAC)
Proceedings of the 18th ACM SIGKDD international conference on Knowledge discovery and data mining
Computers and Electrical Engineering
Hybrid local search polynomial-expanded linear multiuser detector for DS/CDMA systems
International Journal of Wireless and Mobile Computing
A Continuous Relaxation Method for Multiuser Detection Problem
Wireless Personal Communications: An International Journal
Wireless Personal Communications: An International Journal
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Under the assumptions of symbol-synchronous transmissions and white Gaussian noise, the authors analyze the detection mechanism at the receiver, comparing different detectors by their bit error rates in the low-background-noise region and by their worst-case behavior in a near-far environment where the received energies of the users are not necessarily similar. Optimum multiuser detection achieves important performance gains over conventional single-user detection at the expense of computational complexity that grows exponentially with the number of users. It is shown that in the synchronous case the performance achieved by linear multiuser detectors is similar to that of optimum multiuser detection. Attention is focused on detectors whose linear memoryless transformation is a generalized inverse of the matrix of signature waveform crosscorrelations, and on the optimum linear detector. It is shown that the generalized inverse detectors exhibit the same degree of near-far resistance as the optimum multiuser detectors. The optimum linear detector is obtained