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Cooperative networks allow the nodes relaying each other's messages to enhance the transmission reliability over wireless fading channels by achieving cooperative diversity. Among the various relaying protocols, the amplify-and-forward (AF) strategy is well studied for its simplicity. However, to collect the cooperative diversity, there are two main issues that the AF protocol is facing. One is that...
Orthogonal space-time block codes (OSTBC) are attractive in that they can achieve full diversity and linear complexity of maximum likelihood (ML) decoding. However, the OSTBC have a low symbol rate due to the limitation of the orthogonality of the code structure. Most of the high-rate STBC achieve full diversity based on ML decoding at the receiver that is computationally expensive. In order to achieve...
MIMO transmissions (e.g., V-BLAST) have been widely adopted for high-rate high-performance communication systems. When the maximum likelihood (ML) or near-ML detector is employed, full receiver diversity is collected for V-BLAST systems at the cost of high complexity. Conversely, linear equalizers and successive interference cancellation equalizers have much lower complexity, but these equalizers...
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