Delay-diversity in multi-user relay systems with Interleave Division Multiple Access

Petra Weitkemper, Dirk Wubben, Karl-Dirk Kammeyer
2008 2008 IEEE International Symposium on Wireless Communication Systems  
In this paper, a new combination of a multiple access scheme and spatial diversity offered by relays is proposed. In order to support several users in a system, Interleave Division Multiple Access (IDMA) is suggested here due to the capability to deal with asynchronous transmission by the users. The relays apply Amplify-and-Forward combined with delay-diversity in order to exploit the spatial diversity without the need of synchronization of the relays. Furthermore, the IDMA detector can easily
more » ... e extended to utilize the diversity very efficiently. So this combination of basic approaches can deal with asynchronous transmission of the users and the relays, respectively, resulting in a very flexible system with small signaling overhead.
doi:10.1109/iswcs.2008.4726078 fatcat:6ycvt226gjfnfc5zk6aw35jhya