移動(dòng)通信中衰落與系統(tǒng)帶寬關(guān)系研究.pdf

1、南京郵電大學(xué)碩士學(xué)位論文移動(dòng)通信中衰落與系統(tǒng)帶寬關(guān)系研究姓名：鄭嵐申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：電磁場(chǎng)與微波技術(shù)指導(dǎo)教師：吳志忠20060401AbstractAbstractThemobilechannelwillaffecttheperformanceofwirelesscommunicationsystemsMultipathfadingisoneofthemostimportantcharacteristicsinwirelessch

2、annelsThepapercomparedthedifferentcharacteristicsbetweenwidebandandnarrowbandreceivedsystemsThenapropagationparameter—EquivalentreceivedbandwidthwasproposedItistheproductofthereceivedbandwidthandthemaximumdifferenceinthe

3、pathlengthThepaperaimedatresearchingtherelationshipbetweenshort—termfadingandEquivalentreceivedbandwidthFirstthepaperintroducedthecharacteristicoflargescalefading，shadowfadingandsmallscalefadingSmallscalefadingjstheempha

4、sisbecauseitisclosetomobilecommnnicatiOilsThenweusedMATLABtosimulatethedifferentcharaeteristiesbetweenwide—bandandnalTOW—bandreceivedsystemsWeknowthatthewidebandreceivedsignallevelvariationanddistributionissmallerthannar

5、row—bandreceptionThemostimportantissueofthispaperistherelationshipbetweenfadingdepthandequivalentreceivedbandwidthItcanbestatedthatthefadingde：pthdecreasesa，sequivalentreceivedbandwidthincreasesInthispaper，amethodforderi

6、vingthefadingdepthasafunctionoftheequivalentreceivedbandwidthandtheRicefactorfromasimpleanalyticalapproximationispresentedWeapplythemethodintomicroeetlularandmacrocellularenvironmentandgetthefadingdepthindifferentsystems

7、InvestigatingintothecomplexwirelesschannelsinthelabisimportantandvaluabletotheresearchinwirelesschannelscharacteristicsandwirelesscommunicationssystemperformanceKeywords：Multipathfading；fadingdepth；channelcharacteristic；