N TP THNG TIN V TINH - LP THY YM.1. n v.a. Cng sut.P(W) -> P(dBW) = 10logP(W)P(mW) -> P(dBm) = 10logP(mW) = P(dBW)+ 30b. Suy hao.L(ln) = PPout L(dBW) = P (dBW) - Pout (dBW)c. in p/ cng trng (V/mU(V) -> U(dBV) = 20logU(V)U(V) -> U(dBV) = 20logU(V)!. "#ng $ch c%a ant&n ('G(dBi) = 10log(G) [ln]G(dBd) = 10logG(ln )GD2. Tn hiu v h !h"n#.- D li! "#i$ = 1Tbit- "#%d = 1Ts = Rbitlog2M (#%d&'( ')m#ol&')- "#%d= B = Rbitlog2M(1+)*+i ,! '- m./ 0i1 /23 *4 l4 2 '- #5 l6/ l7 $89ng:- ;i 'ng!=RbitB= log2M1+[#i$&'&;?]- @A / $2!B&C! $D '- 'Eng m%ng $FAn $GH ImCN = PCPNCN)dB = 10 + 20log[(log2, J 1): 2]BK"! Bi$ KFFoF "%$L 10-M()i t*p +$ !,- NOn2 CN)dB /P% QPRS (,=T) *4 /P% 1U-QV,:$. Tnh !%&n '()n# !*u+,n.- ; '- W23/2 0Gi /P% %n$Ln $2!G"X = (D )2N% (oS)! C2i$ 05 $GH Im /P% %n$Ln $2:CY! 2 '- $GH Im:NL! $GH Im $8Zng 08Zng (2i d[ng)NL = No(CY J 1)NR = N% + NL ! C2i$ 05 $GH Im 2 $2-ng $2:GRXTS! ; '- H2\m /2ng '