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      • Department of Electrical and Electronics Engineering
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      LDPC code design for fading interference channels

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      Author(s)
      Shakiba-Herfeh, Mahdi
      Tanc, A. K.
      Duman, Tolga M.
      Date
      2019-03
      Source Title
      IEEE Transactions on Vehicular Technology
      Print ISSN
      0018-9545
      Electronic ISSN
      1939-9359
      Publisher
      IEEE
      Volume
      68
      Issue
      3
      Pages
      2374 - 2385
      Language
      English
      Type
      Article
      Item Usage Stats
      136
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      146
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      Abstract
      We focus on the two-user Gaussian interference channel (IC) with fading and study implementation of different encoding/decoding schemes with low-density parity-check (LDPC) codes for both quasi-static and fast fading scenarios. We adopt Han-Kobayashi encoding, derive stability conditions on the degree distributions of LDPC code ensembles, and obtain explicit and practical code designs. In order to estimate the decoding thresholds, a modified form of the extrinsic information transfer chart analysis based on binary erasure channel approximation for the incoming messages from the component LDPC decoders to state nodes is developed. The proposed code design is employed in several examples for both fast and quasi-static fading cases. Comprehensive set of examples demonstrate that the designed codes perform close to the achievable information theoretic limits. Furthermore, multiple antenna transmissions employing the Alamouti scheme for fading ICs are studied, a special receiver structure is developed, and specific codes are explored. Finally, advantages of the designed codes over point-to-point optimal ones are demonstrated via both asymptotic and finite block length simulations.
      Keywords
      Low-density parity-check codes
      Interference channels
      Code design
      Iterative joint decoding
      Han-Kobayashi encoding
      Permalink
      http://hdl.handle.net/11693/52896
      Published Version (Please cite this version)
      https://doi.org/10.1109/TVT.2019.2892036
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      • Department of Electrical and Electronics Engineering 3863
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