Turbo receivers for interleave-division multiple-access systems

• Published in: IEEE transactions on communications Vol. 57; no. 7; pp. 2090 - 2097
• Main Authors: Cristea, B., Roviras, D., Escrig, B.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.07.2009; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Algorithms; Applied sciences; Bit error rate; Charts; Coding, codes; Computer Science; Computer simulation; Convolutional codes; Decoding; Detection, estimation, filtering, equalization, prediction; Detectors; Exact sciences and technology; Gaussian approximation; Information, signal and communications theory; Mud; Multiaccess communication; Multipath channels; Multiple access; Multiple access interference; Multiple access systems; Multiuser detection; PDA; random permutations; Receivers; Signal and communications theory; Signal and Image Processing; Signal, noise; Systems, networks and services of telecommunications; Telecommunications; Telecommunications and information theory; Transceivers; Transmission and modulation (techniques and equipments); turbo receivers; Personal digital assistant; Multiple access; Probabilistic approach; Bit error rate; Iterative method; Turbo code; Multiple access systems; Information transmission; Multipath channels; multiple-access interference; turbo receivers; Signal interference; Multiple models approach; Gaussian process; Algorithm performance; Simulation; Coding; A posteriori estimation; Convergence rate; random permutations; Signal detection
• ISSN: 0090-6778; 1558-0857
• DOI: 10.1109/TCOMM.2009.07.070525

In this paper several turbo receivers for Interleave-Division Multiple-Access (IDMA) systems will be discussed. The multiple access system model is presented first. The optimal, Maximum A Posteriori (MAP) algorithm, is then presented. It will be shown that the use of a precoding technique at the emitter side is applicable to IDMA systems. Several low complexity Multi-User Detector (MUD), based on the Gaussian approximation, will be next discussed. It will be shown that the MUD with Probabilistic Data Association (PDA) algorithm provides faster convergence of the turbo receiver. The discussed turbo receivers will be evaluated by means of Bit Error Rate (BER) simulations and EXtrinsic Information Transfer (EXIT) charts.