A Simple Single-CarrierSpace-Time Transmission Scheme forAsynchronous Cooperative Communications overFrequency-Select
Yingguan Wang · 2008
Thispaperpresents asimple single-carrier (SC)di- stributed space-time block codedtransmission schemeforasyn- chronous cooperative communications overfrequency-selective channels. Thecyclic prefix (CP)atthesource nodeandrelay no- desisusedtocombatinter-symbol interference frommulti-path fading andthetiming errors fromtherelay nodes. Inthis scheme, therelay nodesonlyimplement verysimple operations ontheir received signals toconstruct distributed space-time blockcode, anddecoding, DFT andIDFToperations areonlyneeded atthe destination node. Thelowcomplexity SCzero-forcing frequency domainequalization (ZF-FDE) isapplied atthedestination node torecover thetransmitted signals. Theanalysis andsimulation results demonstrate thatthis simple SCschemecanachieve ord- er-two spatial diversity gainforamplify-and-forward basedcoo- perative communication overfrequency-selective channels inthe presence ofasynchronization between relay nodes.