Blind constrained block-Tucker2 receiver for multiuser SIMO NL-CDMA communication systems

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• 作者：Gé ; rard Favier^a ; ^{favier@i3s.unice.fr} ; Thomas Bouilloc^a ; ^{bouilloc@i3s.unice.fr} ; André ; L.F. de Almeida^b ; ¹ ; ^{andre@gtel.ufc.br}
• 关键词：Tensor modeling ; Tucker decomposition ; Tensor transformations ; CDMA systems ; Nonlinear coding ; Channel and symbol estimation ; Blind receiver
• 刊名：Signal Processing
• 出版年：2012
• 出版时间：July 2012
• 年：2012
• 卷：92
• 期：7
• 页码：1624-1636
• 全文大小：609 K

文摘

In this paper, we propose a deterministic tensor-based approach for joint channel and symbol estimation in the context of multiuser single-input multi-output (SIMO) CDMA communication systems. We use a new nonlinear (NL) coding allowing to obtain a third-order block-Tucker2 model for the signals received by multiple receive antennas, with a constrained structure for the core tensors that ensures the uniqueness of the tensor model. Assuming that the users' code matrices are mutually orthogonal and known at the receiver, we derive a blind algorithm composed of two steps: a separation of users' contributions in the received signals, with decoding, followed by a blind channel and symbol estimation for each user separately. Some simulation results are provided to illustrate the performance of the proposed blind receiver.