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MobileCommunicationMobileCommunicationE-mail:licr@mail.lzjtu.cn232.2.12.2.22.2.32.6.12.6.22.6.34550-200W61.1.12-20km782.2.29f1f2f1f2f1f2f1f1f2f3f1f2f3f110AKJKa=0JmJC/IJ…………AKCBaDf1f2f3fn3r0-2anrrDIC⎟⎟⎠⎞⎜⎜⎝⎛−=00()nrD−−0nr−0()irD0−nrrDmIC⎟⎟⎠⎞⎜⎜⎝⎛−=00111C/IDD/r0dBIC7.30=r012JACADnAn+1aC/I()dBrarIC0023lg40−=()dBrarIC0035lg40−=J…………AKCBaDf1f2f3fn3r0-2a()dBrnarnIC00)12(lg40−−=132.2.31412345615r2r3284.1r24.1r254.0r23.1rr22r26.2rrr59.0r27.01611723ij22jijiN++=184837282116437271913932819127422113731143210Nij191Ai60j6202DQ03rND⋅=NrDQ30==NDN21221212345345671267123451234567345671267123453456767Q=D/ro=4.6N=7DDRR2213132422421313131342442413134423NNNNN=12974324GSMN=74333BB1B3B2CC1C3C2DD1D3D2BB1B3B2CC1C3C2DD1D3D2AA1A3A2AA1A3A2BB1B3B2CC1C3C2DD1D3D2BB1B3B2CC1C3C2DD1D3D2AA1A3A2BB1B3B2CC1C3C2AA1A3A2BB1B3B2CC1C3C2DD1D3D2AA1A3A2BB1B3B2AA1A3A22526272829123430360O1206031S1S2S0321MS2BSf133C/IMSC/ImBSMSC/IC/I1∑==mkkICIC1kIkD∑∑=−=−−⎟⎟⎠⎞⎜⎜⎝⎛==mknkmknknrDDrIC10101nrDmIC⎟⎟⎠⎞⎜⎜⎝⎛=01DDk=34MSC/IC/I24404002)()(−−−−+++−=DrD2rD2rICn0rDDk−=nrrDmIC⎟⎟⎠⎞⎜⎜⎝⎛−=0013517dB6n=4N=7N=7,n=4,m=61()dBdBNIC177.183614==363712381392100%40GSM414243442.6.1n452.6.2A1S“”0SAλ=SA00λ=46100210022100/S=2/21002/60=70SAλ=47BnAErlangBλλλ00−=−=AAAB∑==niiniAnAB1!!ErlangB4849nBAnA)1(0−==η50KCT/KTCa3600=36001CTKnAanAm==aAmnM==51831201010n=8C3/T=120K=10%B=10%A5.59701.0%1036001203=××=a56001.0597.5==M708560==m%638)1.01(597.5)1(=−×=−=nBAη522.6.31“”900MHz2535455