TR2011-032

Non-Coherent Grassmann TCM Design for Physical-Layer Network Coding in Bidirectional MIMO Relaying Systems


    •  Koike-Akino, T.; Orlik, P., "Non-Coherent Grassmann TCM Design for Physical-Layer Network Coding in Bidirectional MIMO Relaying Systems", IEEE International Conference on Communications (ICC), DOI: 10.1109/ICC.2011.5963122, June 2011, pp. 1-5.
      BibTeX Download PDF
      • @inproceedings{Koike-Akino2011jun2,
      • author = {Koike-Akino, T. and Orlik, P.},
      • title = {Non-Coherent Grassmann TCM Design for Physical-Layer Network Coding in Bidirectional MIMO Relaying Systems},
      • booktitle = {IEEE International Conference on Communications (ICC)},
      • year = 2011,
      • pages = {1--5},
      • month = jun,
      • doi = {10.1109/ICC.2011.5963122},
      • url = {http://www.merl.com/publications/TR2011-032}
      • }
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    Communications


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We investigate a bidirectional relaying system which uses physical-layer network coding and non-coherent multi-input multi-output (MIMO) signal processing. With non-coherent codes on Grassmannian manifold, a receiver employing generalized likelihood ratio test (GLRT) algorithm offers the maximum-likelihood performance even without any channel state information (CSI). We propose a new family of non-coherent Grassmann codes which enjoy a significant coding gain by introducing a trellis-coded modulation (TCM) through an affine-lattice convolution with exponential mapping. We develop a design method of individual TCM code-books for multiple users in non-coherent two-way relaying channels with network coding. Since the proposed scheme does not require CSIs, it effectively deals with time-varying fading channels.