数字频带调制的仿真 毕业论文 41页

毕业论文（设计）题目数字频带调制的仿真姓名学号院系专业指导教师2011年月日1摘要随着计算机软件技术的飞速发展,出现了许多先进的EDAELECTRONICDESIGNAUTOMATIC技术。通过仿真软件可对通信系统进行多种方案设计和参数实验,得到最佳设计方案。介绍通信系统原理用美国ELANIX公司系统仿真软件SYSTEMVIEW仿真和分析的方法,详细阐述对通信系统的动态仿真步骤。利用该软件可直观地了解通信系统,同时系统的动态性仿真是对验证性实验的有益补充。详细阐述二进制振幅键控（2ASK）、二进制移频键控（2FSK）、二进制移相键控（2PSK）、二进制差分相位键控（2DPSK）调制与解调及其仿真。帮助自己理解掌握抽象的知识,同时培养自己的设计能力和创新能力。关键字SYSTEMVIEW；调制与解调；2G36G54G46；2G41G54G46；2G51G54G46；2G39G51G54G46。2目录第一章绪论1第二章SYSTEMVIEW介绍4第三章2ASK系统设计5312ASK调制与解调基本原理及其分析5322ASK系统仿真73112ASK相干解调73212ASK非相干解调10第四章2FSK系统设计13412FSK调制与解调基本原理及其分析13422FSK系统仿真154212FSK相干解调154222FSK非相干解调18第五章2PSK系统22512PSK调制与解调基本原理及分析22522PSK系统仿真225212PSK相干解调22第六章2DPSK系统设计25612DPSK调制与解调基本原理及其分析25622DPSK系统仿真266212DPSK相干解调26第七章总结30致谢33参考文献34附录35附录ASYSTEMVIEW图符功能表35附录BSYSTEMVIEW信号源介绍371第一章绪论通信G4613是信G5699的G1268G17767G712G3324G5415G1182G20652G5242信G5699G2282的G12050G1262G712信G5699和通信G5062G13475G6116G1038现G1207G12050G1262的G256G2641G14045G257。信G5699G1328G1038G980种G17176G9316G712G5224该得到G5468G3921地利用G712G3252G8504G6117G1216G5529G20047对信G5699进行有G6940地G1268G17767。通信的G11458的G4613是G1268G17894G9052G5699G6164G2265G2559的信G5699。1837G5192G14719G4584G7043发G7138的有G13459G11017G6265G5332创了利用G11017G1268G17767信G5699的新时G1207G712G1186G8504G712G1166G12879的信G5699的G1861G1151G17246G7481G17246G3921的得到了利用G1075是对G1122通信系统G1039G16213G11013G1209G991G1972G1022G8181G3423G13464G6116A1A2A0A2A4A3A5A6A7A8A9A10A11G8181G6323通信系统是用G8181G6323信G2507G7481G1268G17894信G5699的通信系统G712数字通信系统G5347利用数字信G2507G7481G1268G17894信G5699的通信系统G712G11458G2081G3324G7092G16782是G8181G6323通信G17836是数字通信G712G3324现实G1025的通信G1006G2165G18129得到了G5203G8879的G5224用G712G4600其是G3324通信系统的G2030G2030G5332G3999G2563G14957G10378态G712G8181G6323通信系统得到了G8616数字系统G7368G1038G5203G8879的G5224用G712G1306是G3324现G3324的数字通信系统的飞速发展G712数字通信系统发展速G5242G5468G7138G7186G17241过G8181G6323通信G712G6116G1038数字G5415G1207通信技术的G1039G8981。通信系统G2460G1867有G5468多的G1260G9869G6251G5190G6212能力G5390G712G3134G3780G993G12227G13059G712G1268G17767差G19181可控G712G7143G1122G2164G4506G3800理G712G1457G4506性G3921G12573G12573。G1306是现实G1025G4396G3324的G3534G7424G990G18129是G8181G6323信G2507G712G6164G1209G6117G1216通信G16213进行G8181数G17728G6454G712装G6454G6116数字信G2507后G712G6117G1216G4613G16213对数字信G2507序列进行数字G1268G17767。数字通信系统虽然有这么多的G1260势G712G1306是G712G8181G6323通信系统仍然得到了G5468G3921的利用G712这是G11013G1122G3324G8181G6323通信G3324G980A12A13A14A15A16A12A17A18A19A16A12A20A21A222些通信地方仍然G1867有其自己的特G9869G712如G8181G6323通话G712G8181G6323通信系统占有的带款展G712G3324通信的路数G993需G16213G5468多的情况G991G712G6117G1216的G8181G6323通信系统G4613G1867有数字通信系统的G993G1867有的G13475济性。G3324通信G1025有两大G17176G9316G712G980G1022是信道带宽G712另G980G1022是送G9316功率G712能G5468G3921的减少这两种G17176G9316或者得到有G6940的利用G712G6117G1216G4613认G1038这G1022通信系统G3324这种情况G991G4613是较G3921的通信系统。数字通信系统的G8181G3423如G991A23A24A25A26A27A28A29A30A31A32A33A34A35A36A37数字调制与解调G8181块是G8504G16782文设计的内容G712G16782文设计是G980次综合实验的检测G712是对整G1022通信系统的G7368G3921的实际性的理解G712G3324设计时遇到的问题G712得到解决的同时G712G7368G3921的理解了G6117G1216通信系统的设计的思路和对通信系统的印象的G2164深。数字调制G4613是把数字G3534带信G2507的频谱搬移到G20652频G3800G712形G6116合适的G3324信道G1025G1268G17767带通信G2507。G3534G7424的数字调制有振幅调制（ASK）、频移键控（FSK）、绝对相移键控（PSK）、相对相移键控（DPSK）。G3324接受端可G1209采用相关解调和非相G5190解调G17836原数字G3534带信G2507。数字解调G4613是G17836原G3534带信G2507。G7424G16782文G4613是G3534G1122SYSTEMVIEW的通信系统的仿真G712G1075G4613是G3324SYSTEMVIEW软件环境G991进行二进制振幅键控（2ASK）系统的设计、二进制移频键控（2FSK）系统的设计、二进制移相键控（2PSK）系A38A39A40A41A38A42A39A43A44A38A45A40A41A46A47A48A49A38A45A46A47A50A48A38A45A51A41A50A44A38A39A51A41A52A38A53A54A553统的设计、二进制差分相位键控（2DPSK）系统的设计G712G1867体SYSTEMVIEW软件的G5224用和通信系统的设计与仿真G991面G1262G1867体介绍。4第二章SYSTEMVIEW介绍SYSTEMVIEW是美国ELANIX公司推出的G712G3534G1122WINDOWS环境G991运行的用G1122系统仿真分析的可视G2282软件工G1867G712它使用功能G8181块TOKEN去描述程序G712G7092需与复杂的程序语言打交道G712G993用写G980句G1207码即可完G6116各种系统的设计与仿真G712快速地建立和修改系统、访问与调整参数G712方便地G2164入注释。利用SYSTEMVIEWG712可G1209构造各种复杂的G8181G6323、数字、数G8181混合系统G712各种多速率系统G712G3252G8504G712它可用G1122各种G13459性或非G13459性控制系统的设计和仿真。用户G3324进行系统设计时G712只需G1186SYSTEMVIEW配置的图标库G1025调出有关图标并进行参数设置G712完G6116图标间的连G13459G712然后运行仿真操G1328G712最终G1209时域波形、眼图、功率谱G12573形G5347给出系统的仿真分析结果。SYSTEMVIEW的库G17176G9316十分丰富G712G2265括G2559若G5190图标的G3534G7424库（MAINLIBRARY）及专G1006库OPTIONALLIBRARYG712G3534G7424库G1025G2265括多种信G2507G9316、接G6922G3132、G2164法G3132、G1068法G3132G712各种G2001数运算G3132G12573；专G1006库有通G16771（COMMUNICATION）、G17935G17765（LOGIC）、数字信G2507G3800理（DSP）、G4568频/G8181G6323（RF/ANALOG）G12573；它G1216特G2047适合G1122现G1207通信系统的设计、仿真和方案G16782证G712G4600其适合G1122G7092G13459G11017话、G7092G13511G11017话、G4559G2640机、调制解调G3132、G2367G7155通G16771G12573通信系统；并可进行各种系统时域和频域分析、谱分析G712及对各种G17935G17765G11017路、G4568频/G8181G6323G11017路（混合G3132、G6930大G3132、RLCG11017路、运G6930G11017路G12573）进行理G16782分析和G3845真分析。详细的SYSTEMVIEW功能库介绍G16277G19480G5417G980。SYSTEMVIEW是用G1122现G1207工程与G12197G4410系统设计仿真的动态系统分析G5191G2500。G1186G9400波G3132设计、信G2507G3800理、完整通信系统设计与仿真G712到G980G14336系统的数G4410系统的G8181G3423的建立G12573各G1022G20058域。5第三章2ASK系统设计312ASK调制与解调基本原理及其分析振幅键控是利用G17745波的幅G5242G2476G2282G7481G1268G17894数字信G5699的G712G13792其频率和G2033G3999相位G4465G11719G993G19492G712G33242ASKG1025G712G17745波的幅G5242只有两种G2476G2282G10378态G712分G2047对G5224二进制的信G5699G2560G257和G2561G257。其G15932G17810G5347G1038FTACOSWCTG5415发送1时0G5415发送0时二进制振幅G3534G7424解调有两种方法相G5190解调和非相G5190解调。相G5190解调G1075G2495同步检测法G712分相G5190解调通G5132用G2265G13488检波法。其各有G1260G9869G712G3324信G3134G8616G4579时G712G2265G13488检波发G1867有G1260势G712G3252G1038其检波设G3803G12628G2345G712性G1227G8616G20652G712G13792G3324信G3134G8616相对较大时G712相G5190解调G1867有G1260势G712G3252G1038这种解调方法G4560G14280最终的G16835码率G1314。相G5190解调的原理图如G991A56A57A58A59A60A61A62A63A64A65A66A67A68A69A70A71非相G5190解调的原理图如G9916A71A57A58A60A60A61A62A63A72A64A65A66A67A68A69A70A71观G4531图31G1025的2ASK相G5190解调原理G712二进制G3534带信G2507与G17745波相G1068后G2476G61162ASK调制信G2507G712其G1025G2561G257出现的地方有G8503G5370G17745波波形G712其G1325G18129G10380G712G3324G2164入G3134G3780后G3534G7424G980G7691G712只是G3324调制信G2507的幅G5242G993G980G7691G712若G3134G3780较大G712G2029G993能用非相G5190解调G712相G5190解调是G2265G2559G3134G3780的调制波G712G1038了使后面的抽G7691G2040决G7368G1946G11842G712G5224该G3324接G6922G1055G2081通过G980G1022带通G9400波G3132G712若信G3134G8616G4579G712G1075可G1209G993G2164。解调是利用G17745波信G2507G2318与G5062调信G2507相G1068后G712得出G980G1022频率G7368G20652的G16868波分G18339和G980G1022直G8981分G18339G712G6117G1216只需G16213得到其G1025的直G8981分G18339即可G712G3252G8504G2164G1022G1314通G9400波G3132可G1209实现G1314通G9400波G712G9400G19512G20652频G6116分G712G1457G11053G6117G1216G6164需的直G8981G6116分G712即原G17767入G3534带信G2507G712G1306是通G5132G1075G17836是G993行G712其波形G993是G11709形G712G6117G1216G16213进行G11017G2399G2040决。G2040决的G17767出即G1038原G3999信G2507。G4462时G14045G1926G1038抽G7691G2040决的G2040决G11017G5191。设置G2040决G11017G5191的大G4579G5445G2721G6117G1216G11017G2399G2040决G17767出G712G6117G1216G3324这G18336面最佳G2040决G11017G5191G1038025VG11017G2399（G3252G1038G3534带信G2507G3534带信G2507设置的是G2345G7509性码G712G1000幅G5242设置G103805V）。图32G1025的2ASK非相G5190解调（即2ASK的G2265G13488检波）G1075是G4570调制信G2507进行G1852波整G8981G3132进行整G8981G712然后G1314通G9400波G712G4613可G1209得到G993G5191G9381的G17767出波形G712G1889抽G7691G2040决G712最终得出G6117G1216需G16213的原G3999G3534带信G2507。需G16213注G5859的是G712G2040决G11017G5191G16213设置G1946G11842G712G993然G1262G4560G14280G2040决有G16835码现象。7322ASK系统仿真3112ASK相干解调1）2ASK相干解调波形仿真图A73A74A75A74A76A77A78A79A80A81A82A83A84A85A86A87A88A89A90A91A92A93A94A95A96A97A98A99A100A101A102A103A104A105A106A107A108A109A110A111A112A113A92A93A114A115A116A117A118A90A119A120A121A110A122A123A124A118A90A125A126A127A128A89A93A110A129A128A130A114A117A131A90A132A133A134A88A89A118A91A135A136A137A88A89A131A91A135A136A137A88A89A138A91A139A140A141A114A137A134A88A89A142A91A92A93A94A95A96A97A98A143A144A114A145A146A137A109A110A122A147A148A130A114A110A149A116A117A131A90A132A133A88A89A150A151A88A89A152A91A153A154A95A96A97A155A156A157A105A107A158A159A160A107A134A88A89A161A162A139A140A141A114A137A88A89A150A163A164A110A152A110A118A118A162A165A166A137A1348A88A89A167A91A168A169A170A171A172A173A106A104A174A175A88A89A118A90A162A92A93A94A95A96A97A98A176A177A114A109A110A122A147A148G1186图G1025可知G3324信G3134G8616G4579时G712G2265G13488检波发G1867有G1260势G712G3252G1038其检波设G3803G12628G2345G712性G1227G8616G20652G712G13792G3324信G3134G8616相对较大时G712相G5190解调G1867有G1260势G712G3252G1038这种解调方法G4560G14280最终的G16835码率G1314。数字通信G3324G178292G19G5192G7481得到了G17817速的发展,其原G3252是G29G11G20G12G6251G5190G6212能力G5390G112G12便G1122进行各种数字信G2507G3800理G11G22G12G7143G1122实现G19610G6116G2282G11G23G12G13475济G6940益G8503G17226G990或G17241过G8181G6323通信G11G24G12G1268G17767与交G6454可结合G17227G7481,G1268G17767G11017话与G1268G17767数G6466G1075可结合G17227G7481,G6116G1038G980G1022统G980整体,有利G1122实现综合G1006G2165通信G13605。G7424设计G1039G16213G11752G12362数字通信过程G1025的调制解调过程。G1186原理G990G16840受调G17745波可G1209是G1231G5859的,只G16213G5062调信G2507适合G5527动的G1268G17767G4613可G1209了,G1306是实际G990,大多数通信系统G1025,G18129G17885G6333G8503G5370信G2507G1328G1038G17745波。这是G3252G1038G8503G5370信G2507G12628G2345,便G1122G1147G10995和接G6922。2观察并分析“分析窗口”的波形A）G17767入的二进制G3534带波形A178A179A180A181A182A183A184A185A186A187A188A189A190A191A192A193A194A195A196G17767入的G3534带信G2507是二进制G2345G7509性G1278随机码（即PN序列）G712图34G1025可G11487出G17767入的序列G1038G256G20G20G19G20G20G19G257。B）2ASK调制信G2507（即G5062调信G2507）9A197A198A199A200A201A202A203A204A205A206A207A208A209A210A208A211A212图35G1025可G1209G11487出2ASK调制的调制的结果G712G5415发送的G3534带的码G1815G1038G2561G257时有G17745波进行调制G712G1038G2560G257G2029G8821有G712相G5224G17767出地调制信G2507G1038G2560G257G712G3252G10382ASK是G2345G7509性码。C）2ASK相G5190解调的G1314通G9400波G17767出波形A197A198A199A213A201A202A203A204A205A206A207A208A214A215A216A217A218A219A217A220D）2ASK相G5190解调G2040决G17767出波形A197A198A199A221A201A202A203A204A205A206A207A208A222A223A218A219A217A220图37可G1209G11487出2ASK相G5190解调出G7481的波形与G17767入的原G3534带信G2507G3534G7424G1457G6357G980G14280G712有G980G9869G5322G17843G712G1306G3324G1813许G14551G3272内G712仿真G8503G11842。103212ASK非相干解调1）2ASK非相干解调波形仿真图A224A225A226A227A228A229A230A231A232A233A234A235A236A237A235A238A239A240A241A242A243A244A245A246A247A248A249A250A251A252A253A254A255A39A0A1A2A44A45A5A46A3A243A244A4A6A7A8A52A241A9A54A55A45A56A10A11A52A241A59A12A13A14A240A244A45A19A14A20A4A8A63A241A15A16A66A239A240A52A242A67A17A18A239A240A63A242A243A244A245A246A247A248A249A75A21A4A22A23A18A44A45A56A24A25A18A20A4A45A80A7A8A63A241A15A16A239A240A81A82A239A240A83A242A84A26A246A247A248A27A28A29A39A1A40A30A31A1A239A240A74A242A71A32A33A4A18A33A4A239A240A91A45A81A45A34A45A83A45A52A63A92A35A36A18A66A239A240A52A52A242A97A37A38A41A42A43A0A255A47A48A239A240A52A241A92A243A244A245A246A247A248A249A105A49A4A44A45A56A24A252观察并分析“分析窗口”的波形A）G17767入的二进制G3534带波形11A50A51A53A57A58A60A61A62A64A65A68A69A70A72A73A76A77A78A79G17767入的G3534带信G2507是二进制G2345G7509性G1278随机码（即PN序列）G712图39G1025可G11487出G17767入的序列G1038G256G20G19G20G20G19G257。B）2ASK调制信G2507（即G5062调信G2507）A50A51A53A85A86A58A60A61A62A64A65A68A69A73A87A88A78A79图310G1025可G1209G11487出2ASK调制的调制的结果G712G5415发送的G3534带的码G1815G1038G2561G257时有G17745波进行调制G712G1038G2560G257G2029G8821有G712相G5224G17767出地调制信G2507G1038G2560G257G712G3252G10382ASK是G2345G7509性码。C）2ASKG2265G13488检波的G2334波整G8981G17767出波形A50A51A53A85A85A58A60A61A62A64A65A68A69A73A89A69A90A93A70A94A69A95图311G1025可G1209G11487出2ASK的G2334波整G8981G17767出波形是对2ASK调制信G2507进行整G8981G712G2476G6116幅G5242G1852是G8503的G8503G5370波。12D）2ASKG2265G13488检波的G1314通G9400波G17767出波形A50A51A53A85A58A58A60A61A62A64A65A68A69A73A96A98A99A69A70A94A69A95E）2ASKG2265G13488检波的G2040决G17767出波形A50A51A53A85A51A58A60A61A62A64A65A68A69A100A101A70A94A69A95图313可G1209G11487出2ASKG2265G13488检波出G7481的波形与G17767入的原G3534带信G2507G3534G7424G1457G6357G980G14280G712有G980G9869G5322G17843G712G1306G3324G1813许G14551G3272内G712仿真G8503G11842。2ASK的非相G5190解调的G2040决G3132G3324最后的G17767出G2040决时G17227着非G5132G18337G16213的G1328用G712最佳G2040决G11017G2399是G5529G20047G16213G13783G15397的G712G3324仿真时G6117G1216G2474G4804G1552的G980G2334G4613是G2040决G11017G2399。G2040G2399把G993是G11709形的波去G6493G712得到G6117G1216原G3999G17767入的G3534带信G2507。13第四章2FSK系统设计412FSK调制与解调基本原理及其分析频移键控是利用G17745波的频率G2476G2282G7481G1268G17894数字信G5699。G33242FSKG1025G712G17745波的频率随二进制G3534带信G2507G3324F1和F2两G9869间G2476G2282G712其G15932G17810G5347G10382FSK解调方法有两种G712即相G5190解调法和非相G5190解调法。另G3818G17836有G18504频法、过G19658检测法、G7609分检测法。相G5190解调法是利用G17745波与G5062调信G2507进行相G1068后G9400波G17767出得到G712G3324G990面的2FSKG1025G16213两G1022G17745波G712G6164G1209解调G1075G16213两G1022G17745波G712分G2047与G5062调信G2507相G1068后利用G1314通G712最后相G2164即可得到G6117G1216的G9400波G17767出G712最后G2040G2399G17767出得到解调信G2507。非相G5190解调G1075是利用G2265G13488检波法检测得到的。过G19658检测法是G3534G11222FSK信G2507的过G19658G9869数随G993同频率G13792G5334G712通过检测G19658G9869数G11458多少G712G1186G13792G2318分两G1022频率的码G1815。原理G7706图如G991A102A103A104A106A107A108A109A110A111A112A113A114A115A116A117A102A118A119A120A121A122W1A123A124A125A121A118A119A120A121A122W2A123A124A125A121A126A127A128A129A130A131A132A133A134A130A135FFSKA136TA137ACOSA136W1O1A137A138A139A140A1411A142ACOSA136W2O2A137A138A139A140A1410A14214A102A103A104A107A107A108A109A110A112A113A114A115A116A117A102A102A103A104A143A107A108A109A110A144A145A146A147A148A116A117A102观G4531图41可知2FSK非相G5190解调G4613是分G2047对G2464G7509性码进行G712G1889对调制后的G5062调信G2507分G2047进行带通G9400波G712G9400波完进行G2265G13488检波G712G2265G13488检波G3132与G980G1022整G8981G3132和G1314通G9400波G3132是G12573G1227的。然后抽G7691G2040决G712G990面的大G712G2029G2040G2561G257G712G991面的抽G7691G1552大G712G2029G2040G2560G257。G991面的相G5190解调G1075差G993多G712分G2047带通G9400波G1055后进行与G17745波相G1068G712然后G1314通G9400波G712把2G1505频的分G18339G9400G19512G6493。最后得到接G17829直G8981的分G18339G712G3324进行抽G7691G2040决G712若G990面的G1552大G712G2029G2040G2561G257G712G991面的大G712G2029G2040G2560G257。注G5859若信G3134G8616大G712G2029G993能用G2265G13488检波法G712G16213用相G5190解调法进行解调。过G19658检测G3132G7481解调G4613G993G980G7691G2874先进行G19492幅G712把G8503G5370波G2476G6116接方波的波形。然后微分G712即可G1209得到跳G2476G18339G712整G8981后把负的跳G2476G18339G2476G6116G8503的然后根G6466G19658G9869G1022数可G1209G2040断出其G3534带信G2507。最后G1314通G712G9400G19512G20652频分G18339。G2040G2399的G19658G9869G1022数原理G4613是把整G8981后的波进行G14045G1926展宽。G991面只对2FSK的相G5190解调和非相G5190解调进行仿真。A149A150A151A152A153A154A134A155A156A157A119A158A159A158A160A118A119A120A121A122A161A162A118A119A120A121A122A161A162A126A127A128A129A130A135A130A131A163A164A165A157A119A120A121A122A157A119A120A121A122A166A121A166A12115422FSK系统仿真4212FSK相干解调1）2FSK相干解调波形仿真图A167A168A169A168A170A171A172A173A174A175A176A177A178A179A180A181A182A183A184A185A186A187A188A189A190A191A192A193A194A195A196A197A198A199A200A201A202A203A204A205A206A207A186A187A208A209A210A211A212A184A213A214A215A204A216A217A218A212A184A219A220A221A222A183A187A204A223A222A224A208A211A225A184A226A227A228A182A183A229A204A230A204A229A204A231A204A212A184A185A232A233A234A182A183A235A185A236A233A234A182A183A225A225A185A237A238A237A239A228A182A183A229A204A240A204A212A212A204A212A225A185A186A187A188A189A190A191A192A241A242A208A243A244A234A203A204A216A245A246A224A208A204A247A210A211A225A184A226A227A182A183A248A249A182A183A235A185A250A251A189A190A191A252A253A254A199A201A255A40A0A201A228A182A183A212A52A204A212A230A92A71A1A2A208A234A182A183A212A235A93A212A231A204A225A184A204A225A212A204A225A52A92A7A3A234162FSK调制解调G3132系统G712数字系统的调制和解调的仿真图。2FSK数字系统的调制和解调的仿真图。数字系统的调制仿真图2FSK数字系统的调制仿真图。2FSK调制G4613是使用两G1022G993同的频率的G17745波信G2507G7481G1268G17767G980G1022二进制信G5699序列G712可G1209用二进制“1“G7481对G5224G1122G17745频F1,G13792“0“用G7481对G5224G1122另G980相G17745频W2的G5062调波形,G13792这G1022可G1209用受G11709形G14045G1926序列控制的G5332关G11017路对两G1022G993同的独立的频率G9316W1,F2进行G17885G6333通。2观察并分析“分析窗口”的波形A）G17767入的二进制G3534带波形A4A34A5A6A8A9A10A11A22A12A13A14A15A16A17A18A19A20A21G17767入的G3534带信G2507是二进制G2464G7509性G1278随机码（即PN序列）G712频率G103810HZG712图45G1025可G11487出G17767入的序列G1038G256G20G20G20G20G20G20G20G20G20G20G257。B）2FSK调制信G2507（即G5062调信G2507）A23A24A25A26A27A28A29A30A31A32A33A35A36A37A35A38A39图46G1025可G1209G11487出2FSK调制的调制的结果G712G5415发送的G2464G7509性G353417带的码G1815G1038G2561G257时有频率20HZ的G17745波G1038其进行调制G712G5415发送的G2464G7509性G3534带的码G1815G1038G2561G257时有频率40HZ的G17745波G1038其进行调制。C）2FSK相G5190解调的G1314通G9400波G17767出波形A23A24A25A41A27A28A29A30A31A32A33A35A42A43A44A45A46A47A45A48图47G1025的第G980G1022图是发送码G1815G2561G257对G5224的G1314通G9400波G17767出波形（对G5224G1038A）G712第二G1022图是发送码G1815G2561G257对G5224的G1314通G9400波G17767出波形（对G5224G1038B）G712G2040决（AB）时G17767出G991面的G2040决G17767出波形。D）2FSK相G5190解调G2040决G17767出波形A23A24A25A49A27A28A29A30A31A32A33A35A50A51A46A47A45A48图48可G1209G11487出2FSK相G5190解调出G7481的波形与G17767入的原G3534带信G250718G3534G7424G1457G6357G980G14280G712有G980G9869G5322G17843G712G1306G3324G1813许G14551G3272内G712仿真G8503G11842。4222FSK非相干解调1）2FSK非相干解调波形仿真图A53A54A55A56A57A58A59A60A61A62A63A64A65A66A67A68A69A70A72A73A74A75A76A77A78A79A80A81A82A83A84A85A86A87A88A89A90A91A94A95A96A97A98A75A76A99A100A101A102A103A73A104A105A106A95A107A108A109A103A73A110A111A112A113A72A76A95A114A113A115A99A102A116A73A117A118A119A70A72A116A95A120A74A121A122A123A70A72A124A74A125A122A123A70A72A103A124A74A126A127A126A128A119A70A72A129A95A124A74A75A76A77A78A79A80A81A130A131A99A132A133A123A94A95A107A134A135A115A99A95A136A101A102A116A73A117A118A70A72A137A138A70A72A139A74A140A141A78A79A80A142A143A144A88A90A145A146A147A90A119A70A72A103A120A95A103A129A148A149A150A151A99A123A70A72A103A124A103A137A152A103A153A95A103A154A95A95A116A73A148A155A156A123非相G5190解调G13475过调制后的。2FSK数字信G2507通过两G1022频率G993同的带19通G9400波G3132F1,F2G9400出G993需G16213的信G2507,然后G1889G4570这两种G13475过G9400波的信G2507G712分G2047通过G2265G13488检波G3132检波,最后G4570两种信G2507同时G17767入到抽G7691G2040决G3132同时G3818G2164抽G7691G14045G1926,最后解调出G7481的信G2507G4613是调制G2081的G17767入信G2507其原理图如G991图G6164示F1带通G9400波G3132G2265G13488检波G3132G17767抽G7691G14045G1926抽G7691G2040决G3132G17767出F2带通G9400波G3132G2265G13488检波G3132图49,非相G5190G5347解调仿真。数字调制的发展现G10378和趋势进入2G19世纪G1209G7481,随着晶体管,G19610G6116G11017路的出现与普及,G7092G13459通信G17817速发展特G2047是G33242G19世纪后G2334叶,随着G1166造地球G2367G7155的发G4568,大规G8181G19610G6116G11017路,G11017子计算机和光G4560纤维G12573现G1207技术G6116果的问世,通信技术G3324G1209G991G1972G1022G993同方向G18129G2474得了巨大的G6116功微波G1025继通信使长距离,大容G18339的通信G6116G1038了现实移动通信和G2367G7155通信的出现,使G1166G1216随时随地可通信的愿望可G1209实现。光G4560纤维的出现G7368是G4570通信容G18339提G20652到了G1209G2081G7092法想象的地步G712G11017子计算机的出现G4570通信技术推G990了G7368G20652的层次,借助现G1207G11017信G13605和计算机的融合。2观察并分析“分析窗口”的波形A）G17767入的二进制G3534带波形A157A158A159A160A161A162A163A164A165A166A167A168A169A170A171A172A173A174A175A176A177G17767入的G3534带信G2507是二进制G2464G7509性G1278随机码（即PN序列）G712图410G1025可G11487出G17767入的序列G1038G256G20G20G20G20G20G20G20G20G20G20G20G20G257。B）2FSK调制信G2507（即G5062调信G2507）20A178A179A180