Maximum-Likelihood SymbolTiming Estimation Algorithm forOFDM Systems BasedonaRepeated Preamble
Changkyu Seol, Kyungwhoon Cheun · 2006
Anefficient synchronization scheme based on preamble structure proposed in(3). Theresulting algo- arepetitive preamble structure fororthogonal frequency rithmanditspractical modifications contain, inaddi- division multiplexing systems wasproposed bySchmidltiontothecorrelation termsamongtheidentical parts, andCox.However, standard autocorrelation basedesti-correlation termsbetween theCP andtheuseful part mationalgorithms result inaplateau inthetiming metricofthepreamble. Theresult isa timing metric that duetothecyclic prefix (CP),resulting ina region of doesnotexhibit a lateau. Unlikeschemesproosed uncertainty. Several modifications, either tothepreamble p p p