標題: Cooperative ARQs with Opportunistic Distributed Space-Time Coding: Effective Protocols and Performance Analysis
作者: Chiu, Hsin-Li
Wu, Sau-Hsuan
Li, Jin-Hao
傳播研究所
Institute of Communication Studies
公開日期: 2010
摘要: 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.
URI: http://hdl.handle.net/11536/18956
ISBN: 978-1-4244-8264-1
期刊: 2010 IEEE INFORMATION THEORY WORKSHOP (ITW)
Appears in Collections:Conferences Paper