TY - GEN
T1 - Cooperative ARQs with opportunistic distributed space-time coding
T2 - 2010 IEEE Information Theory Workshop, ITW 2010
AU - Chiu, Hsin Li
AU - Wu, Sau-Hsuan
AU - Li, Jin Hao
PY - 2010
Y1 - 2010
N2 - The paper studies effective protocols and corresponding performance of automatic retransmission request (ARQ) via decode-and-forward (DF) opportunistic distributed space-time coding (ODSTC). Analysis shows that the diversity via ARQ can be drastically increased by allowing non-active relays to overhear the DSTC signal sent by the active relays. Nevertheless, simple schemes without overhearing may also achieve the same diversity when the link quality between the source-relay or the relay-destination is good, hence greatly alleviating the need for a complex protocol with overhearing. Moreover, using more relays opportunistically does provide a higher coding gain if the source-relay channel quality is extremely good, otherwise using two or three relays gives almost the same performance as if using all of them.
AB - The paper studies effective protocols and corresponding performance of automatic retransmission request (ARQ) via decode-and-forward (DF) opportunistic distributed space-time coding (ODSTC). Analysis shows that the diversity via ARQ can be drastically increased by allowing non-active relays to overhear the DSTC signal sent by the active relays. Nevertheless, simple schemes without overhearing may also achieve the same diversity when the link quality between the source-relay or the relay-destination is good, hence greatly alleviating the need for a complex protocol with overhearing. Moreover, using more relays opportunistically does provide a higher coding gain if the source-relay channel quality is extremely good, otherwise using two or three relays gives almost the same performance as if using all of them.
UR - http://www.scopus.com/inward/record.url?scp=80051951698&partnerID=8YFLogxK
U2 - 10.1109/CIG.2010.5592722
DO - 10.1109/CIG.2010.5592722
M3 - Conference contribution
AN - SCOPUS:80051951698
SN - 9781424482641
T3 - 2010 IEEE Information Theory Workshop, ITW 2010 - Proceedings
BT - 2010 IEEE Information Theory Workshop, ITW 2010 - Proceedings
Y2 - 30 August 2010 through 3 September 2010
ER -