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Most research on distributed space-time block coding (D-STBC) has assumed that cooperative relay nodes are perfectly synchronized, for the delay destroys the required spacetime signal structure. However, in most practical distributed scenario, perfect synchronization is hard to achieve. To deal with it, this paper applies front end prefilter (FEP) as a delay synchronization scheme which accomplishes...
In this paper, we propose a TDMA based simple transmission scheme, which overcomes the effect of the delays caused by the poor synchronization of the relaying nodes over Ricean channels. The proposed scheme is able to provide an optimized coding gain in unsynchronized cooperative networks as compared to the existing delay tolerant distributed space-time block codes.
In this paper, we study how to improve the performance of a decode-and-forward protocol based cooperative system over the delay constrained channels. We propose a simple transmission scheme, which makes the cooperative system tolerant of the delays caused by the poor synchronization of the relaying nodes. The proposed scheme is able to provide an improved coding gain in unsynchronized cooperative...
In this paper, we propose an asynchronous cooperative scheme with a decentralized relay strategy. The single carrier block transmission (SCBT) technique is used to mitigate the effect of relay synchronization error. By utilizing an orthogonal space-time code with cyclic delay transmission, cooperative diversity can be achieved. Specifically, each relay node transmits a combination of all rows of the...
Li and Xia have recently investigated the design of space-time codes that achieve full spatial diversity for asynchronous cooperative communications. They show that certain of the binary space-time trellis codes derived from the Hammons-El Gamal stacking construction are delay tolerant and can be used in the multilevel code constructions by Lu and Kumar to produce delay tolerant space-time codes for...
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