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In this paper, we present a new transmit diversity scheme which uses the hybrid automatic repeat request (HARQ) feedback message ACK/NACK as the antenna selection indicator. The proposed scheme is simpler than the conventional selective transmit diversity (STD) plus HARQ scheme or the Alamouti's space-time block coding (STBC) plus HARQ scheme. For the Chase combining HARQ and two-branch diversity,...
This paper proposes a cooperative diversity protocol with truncated automatic repeat request (ARQ) for multicast transmission. The proposed method employs SNR threshold-based selective relaying for distributed space time block coding for retransmission. Numerical results will show that the proposed method with optimal SNR threshold improves the error and throughput performance remarkably.
Hybrid automatic repeat request (HARQ) is an indispensable error control technique for wireless packet access. A combination of multi-carrier code division multiple access (MC-CDMA) and HARQ can provide a good throughput performance in a severe frequency-selective fading channel. Recently, we proposed the space-time block coded-joint transmit/receive diversity (STBC-JTRD), which allows an arbitrary...
Cross Layer Hybrid Automatic Repeat reQuest 2 (HARQ 2) Cooperative Diversityis an efficient transmission scheme, proposed in this paper. This cross layer design scheme, between the physical and data link layer, provides BER and throughput improvements over traditional Coded Cooperation due to the fact that in some cases the base station has already decoded a particular set of information bits using...
We propose a cross-layer design which combines truncated ARQ at the link layer and cooperative diversity at the physical layer. In this scheme, both the source node and the relay nodes utilize an orthogonal space-time block code for packet retransmission. In contrast to previous cooperative diversity protocols, here cooperative diversity is invoked only if the destination node receives an erroneous...
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