A New Linear Group-Wise SIC Multiuser Detector

• Published in: IEEE communications letters Vol. 11; no. 2; pp. 176 - 178
• Main Authors: Bentrcia, A., Zerguine, A., Sheikh, A.U., Benyoucef, M.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.02.2007; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Applied sciences; AWGN; Blocking; Computational complexity; Convergence; Decorrelation; Detection, estimation, filtering, equalization, prediction; Detectors; Equivalence; Error detection; Exact sciences and technology; Gaussian processes; Information, signal and communications theory; Interference cancellation; Iterative methods; Jacobian matrices; Multiuser detection; Signal and communications theory; Signal, noise; Silicon carbide; Simulation; Systems, networks and services of telecommunications; Telecommunications; Telecommunications and information theory; Transmission and modulation (techniques and equipments); Multiuser detection; group-wise; Multiple access; Wireless telecommunication; Iterative method; CDMA; SIC; LMMSE; Linear; Mean square error; Simulation; Code division multiple access; Decorrelation; Gauss Seidel method; decorrelator; Signal detection; Least mean squares methods
• ISSN: 1089-7798; 1558-2558
• DOI: 10.1109/LCOMM.2007.061472

In this work, we introduce a new linear group-wise SIC multi-user detector that can converge to either the decorrelator or the least minimum mean-square error (LMMSE) detector. We study the convergence behavior of the proposed scheme and show that the latter is equivalent to the block Gauss-Seidel iterative method if the group-detection scheme used is the decorrelator detector. Moreover, we prove that the latter is convergent if the group-detection matrix is positive definite. Our simulation results are in excellent agreement with the proposed theory