简介：Theeffectofthespatialcharacteristicsofantennaarrayonsmartantennasystemscannotbeneglected.Inthepaper,therelationbetweenspatialcorrelationandinter-antennadistance,impingingangle,anglespreadisfirstinvestigated.Withthesamebeamformingalgorithm,wesimulatetheperformanceofsmartantennasystemwithdifferentAngleSpread(AS)valuesontheconditionsofidealandrealAngleofArrival(AOA)estimation.TheresultsshowthatwiththeidealAOAestimation,theAOAisenoughaccuratetoguaranteethatthesystemonlyhaslittleperformancedegradationeveninthecaseof20degreeeASvaluewhiletherealAOAestimationinfluencedbychannelenvironmentdegradestheperformanceveryobviously,uptoabout7dB.

简介：active-fault-alarm(AFA)被开发了完成各种各样的网络服务的快恢复，但是虚惊当适用于10Gigabit以太网时，仍然存在在力量的积极光网络(10G-EPON)格子。解决这个问题，一只活跃差错闹钟基于保护前(AFA-PP)在为力量格子的10G-EPON系统的计划在这份报纸被建议。AFA-PP计划充分利用AFA技术，并且允许预先进行保护前操作。分析、试验性的结果建议新机制的更好的表演并且证明AFA-PP能高效地解决虚惊的问题。