Fundamentals of statistical signal processing: estimation theory
Fundamentals of statistical signal processing: estimation theory
Principles of mobile communication (2nd ed.)
Principles of mobile communication (2nd ed.)
Amplitude clipping and iterative reconstruction of MIMO-OFDM signals with optimum equalization
IEEE Transactions on Wireless Communications
Performance of single carrier transmission with cooperative diversity over fast fading channels
IEEE Transactions on Communications
Equalization Techniques for Distributed Space-Time Block Codes With Amplify-and-Forward Relaying
IEEE Transactions on Signal Processing
Factor graphs and the sum-product algorithm
IEEE Transactions on Information Theory
On the achievable diversity-multiplexing tradeoff in half-duplex cooperative channels
IEEE Transactions on Information Theory
A Network Coding Approach to Cooperative Diversity
IEEE Transactions on Information Theory
Frequency domain equalization for single-carrier broadband wireless systems
IEEE Communications Magazine
A simple transmit diversity technique for wireless communications
IEEE Journal on Selected Areas in Communications
Iterative turbo decoder analysis based on density evolution
IEEE Journal on Selected Areas in Communications
Joint iterative decoding of serially concatenated error control coded CDMA
IEEE Journal on Selected Areas in Communications
Fading relay channels: performance limits and space-time signal design
IEEE Journal on Selected Areas in Communications
Complex Field Network Coding for Multiuser Cooperative Communications
IEEE Journal on Selected Areas in Communications
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Cooperative communications can achieve spatial diversity gain and enhance coverage. However, conventional halfduplex relaying schemes suffer from the loss in spectral efficiency, because the two channel uses are required for transmission from the source to the destination. In this paper, we present spectral efficient transmissions for a user cooperative diversity system over multipath fading channels. To increase the spectral efficiency, a node, which acts as a relay, employs a superposition coding to transmit its own data block and the data block from the other node simultaneously. For superposition, we consider two different re-encoding schemes. One is based on complex field superposition coding and the other is based on Galois field superposition coding. In both re-encoding schemes, we introduce a user-specific interleaver to the data blocks for user separation. We also propose an iterative detection scheme to combat the effects of inter-symbol interference caused by multipath fading and to extract diversity gain from the superposed signals. For performance estimation, we develop a density evolution technique. It is shown that the proposed schemes can obtain diversity gain without sacrificing spectral efficiency and the predicted performances are consistent with simulated performances.