《Performance of M-QAM, M-DPSK and M-PSK with MRC diversity in a Nakagami-m fading channel》.pdf
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《Performance of M-QAM, M-DPSK and M-PSK with MRC diversity in a Nakagami-m fading channel》.pdf
J.Cent.SouthUniv.(2014)21:1347—1352 垒Springer
DoI:10.1007/sl1771.014.2072—7
PerformanceofM—QAM,M—DPSKandM—PSKwith
MRCdiversityinaNakagami—m fadingchannel
Alam S.M .ShamsulAlam,ChoiGoangSeog
DepartmentofInformationandCommunicationEngineering,
ChosunUniversity,309PilmoonDaero,Dong,GwangJu,501-759,Korea
⑥CentralSouthUniversiytPressandSpringer-VerlagBerlinHeidelberg2014
Abstract:Thenamreofawirelesscommunicationchannelisveryunpredictable.Todesignagoodcommunicationlink.itisrequired
toknow thestatisticalmodelofthechanne1accurately.Theaveragesymbolerrorprobability (ASER)wasanalyzedfordifferent
modulationschemes.A unified analytical~ameworkwaspresentedtoobtain closed—ofrm solutionsforcalculatingtheASER of
M.arydifferentialphase—shiftkeying(M.DPSK),coherentM—aryphase.shiftkeying(M—PSK),andquadratureamplitudemodulation
f0AM)oversingleormultipleNakagami—m fadingchannels.Moreover,theASER wasestimatedandevaluatedbyusingthe
maximalratio—combining(MRC)diversitytechnique.Simulationresultsshowthatanerrorrateofthefadingchanneltypically
dependsonNakagamiparameters(),spacediversiyt (M,andsymbolrate( .AcomparisonbetweenM—PSK,M—DPSK,and
M—OAM modulationschemeswasshown,andtheresultsprovethatM—ary QAM (M—QAM)demonstratesbetterperfomrance
comparedtoM—DPSK andM .PSK underallfadingandnon—fadingconditions.
Keywords:M-arydifferentialphase—shiftkeying(M—DPSK);M—aryphaseshiftkeying(M—PSK);Nakagami—m fadingchannel;
probabiliytdensiytfunction(PDF);symbolerrorrate(SER);M—aryquardatureamplitudemodulation(M—QAM)
symbolerrorrate(SER)ofgeneralrectangularQAM
1IntrOductiOn overNakagami.m fadingchannelsexistonlyforsquare
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