NDLI: Wireless network coding for MIMO two-way relaying using Latin Rectangles

Content Provider	IEEE Xplore Digital Library
Author	Muralidharan, V.T. Rajan, B.S.
Copyright Year	2012
Description	Author affiliation: Dept. of ECE, IISc, Bangalore 560012, India (Muralidharan, V.T.; Rajan, B.S.)
Abstract	The design of modulation schemes for the physical layer network-coded two-way MIMO relaying scenario is considered, with the denoise-and-forward (DNF) protocol which employs two phases: Multiple access (MA) phase and Broadcast (BC) phase. It is shown that for MIMO two-way relaying, deep fade occurs at the relay when the row space of the channel fade coefficient matrix is a subspace of a finite number of vector subspaces which are referred to as the singular fade subspaces. It is shown that proper choice of network coding map obtained by the completion of appropriate partially filled Latin Rectangle can remove most of the singular fade subspaces, referred to as the removable singular fade subspaces. For $2^{λ}-PSK$ signal set, the number of removable and non-removable singular fade subspaces are obtained analytically and it is shown that the number of nonremovable singular fade subspaces is a small fraction of the total number of singular fade subspaces. The Latin Rectangles for the case when the end nodes use different number of antennas are shown to be obtainable from the Latin Squares for the case when they use the same number of antennas, irrespective of the number of antennas at the relay. For $2^{λ}-PSK$ signal set, the singular fade subspaces which are removed by the conventional XOR network code are identified. Also, using the notions of isotopic and transposed Latin Squares, the network coding maps which remove all the removable singular singular fade subspaces are shown to be obtainable from a small set of Latin Squares.
Starting Page	2067
Ending Page	2071
File Size	175060
Page Count	5
File Format	PDF
ISBN	9781467325806
ISSN	21578117
e-ISBN	9781467325790
e-ISBN	9781467325783
DOI	10.1109/ISIT.2012.6283725
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-07-01
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Vectors Network coding Relays Antennas Rician channels Wireless communication
Content Type	Text
Resource Type	Article

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