Diversity-Multiplexing-Delay Tradeoff in Decode-and-Forward MIMO Relay Network with CC-ARQ

In this paper, three dimensional tradeoff between diversity, multiplexing, and delay is explored, where the delay considered is introduced only by retransmissions. Multiple antennas at the transceiver stations provide better reliability of reception and it can also increase the data rate of communication to improve the system performance. Channel controlled automatic retransmission request (CC-ARQ) design is used on the channel link to achieve the better diversity gain at the cost of increased retransmission request. Further, theoretical results are verified using the numerical simulation which shows the tradeoff between diversity (i.e., reliability), multiplexing (i.e., data rate), and delay (i.e., no. of ARQ rounds).