Title :
On the Outage Probability of Asynchronous Wireless Cooperative Networks
Author :
Nahas, Michel ; Saadani, Ahmed ; Hachem, Walid
Author_Institution :
Orange Labs., Issy-les-Moulineaux
Abstract :
In wireless cooperative networks, the asynchronism between the relays can be a source of diversity which is similar in its essence to the multipath diversity of frequency selective channels. In this context, an asynchronous two-relay two-hop cooperative wireless network using the Decode-and-Forward protocol is studied. The outage probability in the high Signal to Noise Ratio (SNR) regime is derived and the impact of the relative delay between the two relays on this outage probability is evaluated. We show that for a sufficiently high relative delay, the outage performance becomes independent from the relative delay. Moreover, an outage probability minimization with respect to the power distribution between the transmitting nodes of the network is carried out in the high SNR regime.
Keywords :
multipath channels; probability; protocols; radio networks; relays; asynchronous wireless cooperative networks; decode-and-forward protocol; frequency selective channels; multipath diversity; outage probability; relays; signal to noise ratio; Broadcasting; Decoding; Delay; MIMO; Power distribution; Power system relaying; Relays; Signal to noise ratio; Wireless application protocol; Wireless networks;
Conference_Titel :
Vehicular Technology Conference, 2008. VTC 2008-Fall. IEEE 68th
Conference_Location :
Calgary, BC
Print_ISBN :
978-1-4244-1721-6
Electronic_ISBN :
1090-3038
DOI :
10.1109/VETECF.2008.79