Diversity multiplexing tradeoff of asynchronous cooperative relay networks
R. N. Krishnakumar, N. Naveen, K. Sreeram, P. Vijay Kumar · 2008
The assumption of nodes in a cooperative communication relay network operating in synchronous fashion is often unrealistic. In the present paper we consider two different models of asynchronous operation in cooperative-diversity networks experiencing slow fading and examine the corresponding diversity-multiplexing tradeoffs (DMT). For both models, we propose protocols and distributed space-time codes that asymptotically achieve the transmit diversity bound for all multiplexing gains and for number of relays N ges 2.