Title :
Relay Cyclic Delay Diversity: Modeling & System Performance
Author :
Osseiran, Afif ; Logothetis, Andrew ; Slimane, Slimane Ben ; Larsson, Peter
Author_Institution :
Ericsson Res., Stockholm, Sweden
Abstract :
A cooperative communication scheme referred to as relay cyclic delay diversity (RCDD) is presented in this paper. The scheme is based on a set of distributed relay nodes (RNs) with each node associated with a certain cyclic shift in order to generate artificially multi-path diversity and equivalently frequency diversity. RCDD is an open loop scheme and the user terminal (UT) only needs to estimate an effective channel from all the RNs and not the channel from each RN. The effective channel induced by RCDD is frequency selective and can be exploited by a maximum signal to interference noise ratio (SINR) scheduler which improves substantially the system throughput. The SINR of the RCDD is derived analytically and the performance of the method is evaluated in a dynamic multi-cell multi-user simulator. The results show considerable SINR gains that translate into substantial cell throughput gains compared to 1-hop systems.
Keywords :
cooperative systems; diversity reception; interference (signal); open loop systems; cooperative communication; distributed relay nodes; dynamic multicell multiuser simulator; equivalently frequency diversity; frequency selective; multipath diversity; open loop scheme; relay cyclic delay diversity; signal to interference noise ratio; user terminal; Analytical models; Delay; Frequency diversity; Frequency estimation; Interference; Performance analysis; Relays; Signal to noise ratio; System performance; Throughput; Cooperative communication; OFDM; cyclic delay diversity; multi-user diversity; multipath diversity; relay node; system performance;
Conference_Titel :
Signal Processing and Communications, 2007. ICSPC 2007. IEEE International Conference on
Conference_Location :
Dubai
Print_ISBN :
978-1-4244-1235-8
Electronic_ISBN :
978-1-4244-1236-5
DOI :
10.1109/ICSPC.2007.4728246
