数据通信习题

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18.ᦪ./0123ḄDCE9OPᑴRPᘤ஺A.B.┯1ᭆ"#$%ᫀ[B;]᪗(%ᫀB)ᑖ[5]+⚪ᑖ,5.09.10.┯TPU12MWᜧWY஺A.B.┯2ᦪ.0ḄCD#$%ᫀ[A;]᪗(%ᫀB)ᑖ[0]+⚪ᑖ,5.011.┯⚣[CD12=\[CD12Ḅ]⌕_`ᙠbcdePᑴஹRPᘤ஺A.B.┯2ᦪ.0ḄCD#$%ᫀf᪗(%ᫀA)ᑖ[0]+⚪ᑖ,5.012.ijPiḄkὃiO0஺A.B.┯2ᦪ.0ḄCD#$%ᫀ[B;]᪗(%ᫀB)ᑖ[5]+⚪ᑖ5.0

213.14.┯noI/Ḅpqrstuᨵwxy᡾>{|O\[uᡂ~஺A.B.┯2ᦪ.0ḄCD#$%ᫀ[A;]᪗(%ᫀB)ᑖ[0]+⚪ᑖ,5.015.┯\[ᦪ.CD123Ḅ\[uᡂtᘤjsḼᱥᳮ7ᜓ஺A.B.┯2ᦪ.0ḄCD#$%ᫀ[A;]᪗(%ᫀB)ᑖ[0]+⚪ᑖ,5.0ஹᓫ⚗⌱⚪ᐳ10⍝⚪ᐳ50.0ᑖ1.┯ᵯḄᦪ.0ᑡwᵨᑴṹ⊤A.2B.3C.4D.51ᭆ"#$%ᫀ[C;]᪗(%ᫀB)ᑖ+⚪ᑖ,5.0

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5¤ᵨ2DPSKḄËÌA.RÍṹ᡽ᦣB.RÍiÐÑÒ⚪C.ÓÔ⚣[ᑭᵨ᳛D.¬᧕×Ø2ᦪ.0ḄCD#$%ᫀ[A;]᪗(%ᫀB)ᑖ+⚪ᑖ,5.010.ᦪ.CD12ḄÙÚḄÛᵨA.tB.⊝CDtuḄᶚÞßàC.áṹxy᡾D.âIṹ᳛2ᦪ.0ḄCD#$%ᫀ[B;]᪗(%ᫀB)ᑖ[5]+⚪ᑖ,5.011.12.┯⚣[CD123RPãäËḄᨵA.\[0B.\[0µÔåæᱥC.ÔåæᱥD.ᦪ.0ᑡ2ᦪ.0ḄCD#$%ᫀ[A;]᪗(%ᫀB)ᑖ[0]+⚪ᑖ,5.0ஹᑨ⚪ᐳ10⍝⚪ᐳ50.0ᑖ1.ᦪ.C〈è᳛ᜧbᦪ.C0è᳛஺A.B.┯

61ᭆ"#$%ᫀ[B;]᪗(%ᫀB)ᑖ[5]+⚪ᑖ,5.03.ᦪ.=ᦪ.ᵯ?@஺A.B.┯1ᭆ"#$%ᫀ[B;]᪗(%ᫀB)ᑖ[5]+⚪ᑖ,5.05.0ṹᐗ=CDṹêiF஺A.B.┯1ᭆ"#$%ᫀ[B;]᪗(%ᫀB)ᑖ5]+⚪ᑖ,5.06.7.ᦪ./0123ḄDCE9OPᑴRPᘤ஺A.B.┯1ᭆ"#$%ᫀ[B;]᪗(%ᫀB)ᑖ[5]+⚪ᑖ,5.08.9.⚣[CD12=\[CD12Ḅ]⌕_`ᙠbcdePᑴஹRPᘤ஺A.B.┯2ᦪ.0ḄCD#$%ᫀ[A;]᪗(%ᫀA)ᑖ[5]+⚪ᑖ,5.010.11.┯

7X.51¾EX.50¾ᵨ)ë஺A.B.┯2ᦪ.0ḄCD#$%ᫀ[A;J᪗%ᫀB)ᑖ[0]+⚪ᑖ,5.012.┯ÙÚ²⊝ìᦈtuḄṹxy᡾îï஺A.B.┯2ᦪ.0ḄCD#$%ᫀ[B;]᪗(%ᫀA)ᑖ[0]+⚪ᑖ,5.013.ᳮðñòóᨵôõtᘤNT8ªø´ù◀wxy᡾஺A.B.┯2ᦪ.0ḄCD#$%ᫀ[A;]᪗(%ᫀA)ᑖ[5]+⚪ᑖ,5.014.15.ᓣnoüâI/Ḅ⚣[ᑭᵨ᳛ᙳOn=itᱯ/HzoA.B.┯2ᦪ.0ḄCD#$%ᫀ[B;]᪗(%ᫀB)ᑖ[5]+⚪ᑖ,5.016.17.noI/Ḅpqrstuᨵwxy᡾>{|O\[uᡂ~஺

8A.B.┯2ᦪ.0ḄCD#$%ᫀ[B;]᪗(%ᫀB)ᑖ[5]+⚪ᑖ,5.018.ஹᓫ⚗⌱⚪ᐳ10⍝⚪ᐳ50.0ᑖ1.7ᦪ0⍝Ḅ[O3000HZ,¤ᵨᑴCD§¨©ª«ᦪ0⍝Ḅ¬COA.6000bit/sB.12000bit/sC.18000bit/sD.24000bit/s1ᭆ"#$%ᫀ[C;]᪗(%ᫀC)ᑖ[5]+⚪ᑖ,5.02.3.ᵯḄᦪ.0ᑡwᵨᑴṹ⊤A.2B.3C.4D.51ᭆ"#$%ᫀ[B;]᪗(%ᫀ)ᑖ[5]+⚪ᑖ,5.04.5.⌕ᦪ./0ᨵᦔᙢA.ᦪ.ᵯB.ᦪ.C.CD0⍝D.ᱥᳮ0⍝:1ᭆ"#$%ᫀ[B;]᪗(%ᫀB

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10B.7C.8D.92ᦪ-.VḄᫀ[CW]᪗ᫀCᑖ[5]⚪ᑖ5.013.14.@ᵨ2DPSKḄ]^(A._`aṹ᡽ᦣB._`efghi⚪C.jk⚣1ᑭᵨ᳛D.J᧕mn2ᦪ-.VḄᫀ[B;]᪗ᫀBᑖ[5]⚪ᑖ5.015.16.ᦪ-pqḄrsḄtᵨ(A.B.⊝uḄᶚwxyC.z{ṹ|}᡾D.aṹ᳛2ᦪ-.VḄᫀ[B;]᪗ᫀBᑖ[5]⚪ᑖ5.017.18.┯a1ᨬᓄḄᩩ(A.S|"B.3=l«S|=WSlc.gohMol+sfD.mm=|«cn|=|Hcnf

112ᦪ-.VḄᫀ[C;]᪗ᫀAᑖ[0]⚪ᑖ5.0ஹᑨ⚪ᐳ10⍝{⚪Dᐳ50.0ᑖ1.ᦪ-〈*᳛ᜧᦪ-.*᳛஺A.B.┯a1ᭆᫀ[B;]᪗ᫀBᑖ[5]⚪ᑖ5.02.3.ᦪ-ᦪ-ᵯ(஺A.B.┯a1ᭆᫀ[B;]᪗ᫀBᑖ[5]⚪ᑖ5.04.5.ᦪ-ᦪ-.V(஺A.B.┯a1ᭆᫀ[A;]᪗ᫀAᑖ[5]⚪ᑖ5.06.7.TḄᦔ᳛஺A.B.┯a1ᭆᫀ[A;]᪗ᫀAᑖ[5]⚪ᑖ5.08.

129.┯ae)eT)eḄ⚣1ᑭᵨ᳛k஺A.B.┯a2ᦪ-.VḄᫀ[A;]᪗ᫀBᑖ[0]⚪ᑖ5.010.¡)¢pqM£ᜧ£¤஺A.B.┯a2ᦪ-.VḄᫀ[B;]᪗ᫀBᑖ[5]⚪ᑖ5.011.12.ᳮ¦§uᡂ©ª(«§uᡂ©ªḄᱯ¬஺A.B.┯a2ᦪ-.VḄᫀ[A;]᪗ᫀAᑖ[5]⚪ᑖ5.013.14.┯aᦪ8)⚣Ḅ⚣1ᑭᵨ᳛ᨬ஺A.B,┯a2ᦪ-.VḄᫀ[B;]᪗ᫀAᑖ[0]⚪ᑖ5.0

1315.┯aMQAMMᢣḄ(®¯s°Ḅᦪ஺A.B,┯a2ᦪ-.VḄᫀ[B;]᪗ᫀAᑖ[0]⚪ᑖ5.016.1ᦪ-pqḄ1uᡂᘤ±Ḽ³ᱥᳮ7ᜓ஺A.B.┯a2ᦪ-.VḄᫀ[B;]᪗ᫀBᑖ[5]⚪ᑖ5.017.:ஹᓫ⚗⌱º⚪ᐳ10⍝{⚪Dᐳ50.0ᑖ1.ᐰ¼½ᦪ-(A.¼ᔣHB.¿¼ᔣÀÁHCÂC.ᓫᔣD.AÃBᙳ¿Å1ᭆᫀ[A;]᪗ᫀAᑖ[5]⚪ᑖ5.02.3.Æ⌕Çᦪ-§.ᨵᦔᙢCÂDÉÊOËA.ᦪ-ᵯB.ᦪ-

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1511.ᦪ-.*᳛Ôṹᐗ*᳛*ஹ|Ḅᐵp;A.M.B.ØுMC.&ND.Å°Ú1ᭆᫀ[C;]᪗ᫀCᑖ[5]⚪ᑖ5.012.13.⚣1ᑭᵨ᳛ᨬḄ)ᑴÛÜ(A.Ýe)eB.2FSKC.Þe)eD.¡¼ß1)ᑴ2ᦪ-.VḄᫀ[B;]᪗ᫀBᑖ[5]⚪ᑖ5.014.15.2DPSKḄ_)Ûà;A.᩽ឋTâàB.efTâàC.⚣᳛TâàD.AÃB2ᦪ-.VḄᫀ[D;]᪗ᫀDᑖ[5]⚪ᑖ5.016.17.ãä᜼æᑣHDèV*᳛;A.32B.Xr

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174.5.TḄᦔ᳛஺A.B,┯a1ᭆᫀ[A;]᪗ᫀAᑖ[5]⚪ᑖ5.06.7..Vṹᐗùṹú(e஺A.B.┯a1ᭆᫀ[B;]᪗ᫀBᑖ[5]⚪ᑖ5.08.9.ᦪ-§.pqḄDCEû;)ᑴ_)ᘤ஺A.B.┯a1ᭆᫀ[B;]᪗ᫀBᑖ[5]⚪ᑖ5.010.11.X.50OPḄüᵨÛÜ(Tᱯ¡ý஺A.B.┯a2ᦪ-.VḄᫀ[B;]᪗ᫀBᑖ[5]⚪ᑖ5.012.13.MQAMMᢣḄḄᦪ஺A.B.┯

182ᦪḄᫀ[A;]᪗!ᫀA"ᑖ[5]$⚪ᑖ&5.014.15.ᳮ)*+,ᨵ./01ᘤNT86+789◀;<=᡾஺A.B.┯2ᦪḄᫀ[A;]᪗!ᫀA"ᑖ[5]$⚪ᑖ&5.016.17.?@ABḄCDEF1Gᨵ;<=᡾+HIJKLMGᡂOP஺A.B.┯2ᦪḄᫀ[B;]᪗!ᫀB"ᑖ[5]$⚪ᑖ&5.018.19.┯QLMḄ⍝ᵯT⍝஺A.B.┯2ᦪḄᫀ[B;]᪗!ᫀA"ᑖ[0]$⚪ᑖ&5.0Uஹᓫ⚗⌱Z⚪[ᐳ10⍝]⚪+ᐳ50.0ᑖQ1.^ᦪ_⍝ḄM`K3000Hz,aᵨcdᑴ+fgh6iᦪ_⍝ḄjkCKA.6000bit/sB.12000bit/sC.18000bit/s

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3410.᜻ᏔṓṹḄ/┯01W}~ṹ2஺A.IJB.┯"#$%3&┯ᑴ'(ᫀ[B;]᪗ᫀBᑖ±⚪ᑖ5.011.12.┯L{Õ✄l◤⌕L⍝ṹᘤ஺A.IJB.┯"#$%3&┯ᑴ'(ᫀ[B;]᪗ᫀ:Aᑖç⚪ᑖ:5.013.┯Ôᔠ┯/┯l◤ÕᔣL⍝஺A.IJB.┯"#$%3&┯ᑴ'(ᫀ[A;]᪗ᫀ:Bᑖ[0]⚪ᑖ:5.014.r-ᜧ3ஹ/┯01-2஺A.IJB.┯"#$%3&┯ᑴ'(ᫀ[A;]᪗ᫀAᑖ±⚪ᑖ5.0

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364.┯ìEᦪKNO+ᦈî¥ᘤḄvᵨeA.î◀ðñ!¡᡾B,▲ᑴLM⚣EC.u¥¦¦ᡂvᵨD.î◀ðñ!¡᡾u¥¦¦ᡂvᵨ"#$%2&ᦪKLMḄNO'(ᫀ[A;]᪗ᫀDᑖ[0]⚪ᑖ5.05.ᓫ᩽ឋlóÌṹḄô᳛õö÷=P=l/2A.Àᦣõ3üýõḄ%9þÌ$ᙠfsᜐB.
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