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Recently, two classes of high rate bilayer low-density parity-check (LDPC) codes have been proposed for Gaussian relay channels using bilayer density evolution technique. These two classes include bilayer lengthened LDPC codes and bilayer expurgated LDPC codes that have been used in a decode-and-forward relaying strategy. In this paper, we first study the decode-and-forward achievable rates for a...
A novel Lattice Precoding scheme based on Eigenvalue decomposition (EDLP) is proposed for single user multiple- input multiple-output (MIMO) communication systems transmitting over slowly-varying flat-fading channels. This technique uses linear precoding to orthogonalize the channels, thus nullifying the interference. It employs a perturbation vector as well to reduce the transmitted power. The performance...
This paper provides some details of a novel vector perturbation based lattice precoding algorithm based on Eigenvalue decomposition, named EDLP, for single user multiple-input multiple-output (MIMO) systems operating over slowly-varying flat-fading channels. Linear precoding is used in this technique to orthogonalize the fading channel, thus nullifying the interference among spatial channels. A perturbation...
A major concern in designing communication systems is to maintain quality of service for a wide range of channel conditions. This is an important issue particularly for the applications where precise characterization of the channel is impossible. For such applications, the source data can be classified into several classes and Unequal Error Protection (UEP) can be used to effectively protect the more...
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