2022年通信原理复习题及答案 .pdf

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1、We will continue t o improve the companys internal control system, and steady improvement in ability to manage and control, optimize business processes, to ensure smooth processes, responsibilities in place; to further stre ngthen internal controls, play a control post independent oversight rol e of

2、 evaluation complying with third-party responsibility; to actively make use of internal audit tools detect potential management, streamline, standardize related transactions, strengthening operations in accordance with law. Deepening t he information management to ensure full communication zero resi

3、stance. o constantly perfect ERPand BFS+, and PI, and MIS, and SCM, information system based construction, full integration information system, achieved information resources shared; to expand Portal system application of breadth and depth, play information system on enterprise of Assistant role; to

4、 perfect daily run maintenance operation of records, promote problem reasons analysis and system handover; to strengthening BFS+, and ERP, and SCM, technology appli cation of training, improve employees a pplication information system of capacity and level. Humanistic care t o ensure zero. To streng

5、thening Humanities care, continues to foster company wind clear, and gas are, and heart Shun of culture atmosphere; strengthening love helpe d trapped, care difficult employees; carried out style activities, rich employees life; strengthening health and labour protection, organization career health

6、medical, control career against; continues to implementation psychological warning prevention system, training employees health of character, and stable of mood and enterprising of attitude, created friendly fraternity of Humanities environment. To strengthen risk management, ensure that the busines

7、s of zero risk. To strengthened busi ness plans management, will business business plans cover to all level, ensure the business can control in contr ol; to close concern financial, and coal electric linkage, and energy-saving scheduling, national policy trends, strengthening track, active should; t

8、o implementation State-owned a ssets method, further spe cification business financial management; to perfect risk tube control system, achieved risk recog nition, and measure, and assessment, andreport, and control feedba ck of close d ring management, improve risk prevention capacity. To further s

9、tandardize trading, and strive to achieve according to law , standardize and fair. Innovation of performance management, to ensure that potential employees zero fly. To strengthen performance management, process control, enha nce employee evaluation and levels of effective communication to improve p

10、erformance management. To further quantify and refine employee standards . Work, full play party, and branch, and members in five type Enterprise construction in the of core role, and fighting fortress role and pioneer model role; to continue s to strengthening four good leadership construction, ful

11、l play levels cadre s in enterprise development in theof backbone backbone role; to full strengthening members youth work, full play youth employees in company development in the of force role; to improve independent Commission against corruption work level, strengthening on enterprise business key

12、link of effectiveness monitored. , And maintain stability. To further strengthen publicity and education, improve the overall legal system. We must strengthen safety management, establish and im prove the education, supervision, and evaluation as one of the traffic safety management mechanism. To co

13、nscientiously sum up the Olympic security controls, promoting integrated management to a higher level, higher standards, a higher level of development. Employees, today is lunar calendar on December 24, the ox Bell is about to ring, at this time of year, we clearly feel the pulse of the XX power gen

14、eration company to flourish, to more clearly hear XX power generation companies mature and symmetry breathing. Recalling past one anot her across a railing, we are enthusiastic and full of confidence. Future development opportunities, we more exciting fight more spirited. Employees, let us together

15、across 2013 full of challenges and opportunities, to create a green, low-cost operation, full of humane care of a world-class power generation company and work hard! The occasion of the Spring Festival, my sincere wish that you and the families of the staff in the new year, good health, happy, happy

16、通信原理复习题一、单项选择题1数字通信相对于模拟通信具有（ B ） 。A占用频带小抗干扰能力强C传输容量大易于频分复用2以下属于模拟信号是（ A ） 。APAM 信号 PCM 信号CM 信号DPCM 信号3以下信号属于模拟信号的是（ B ） 。APCM 信号BPAM 信号CM 信号DDPCM 信号4以下属于数字信号是（ D ） 。APAM 信号 PDM 信号CPPM 信号PCM 信号5对于 M进制的离散消息源消息源，其平均信息量最大时的概率分布为（ A ） 。A均匀分布B正态分布C瑞利分布D指数分布6通信系统可分为基带传输和频带传输，以下属于频带传输方式的是（C ） 。APAM 传输方式BPC

17、M 传输方式CPSK 传输方式DM传输方式7通信系统可分为基带传输和频带传输，以下属于基带传输方式的是（ B ） 。APSK 传输方式BPCM 传输方式 C QAM 传输方式 DSSB传输方式8按信号特征通信系统可分为模拟和数字通信系统，以下为数字通信系统的是（D ） 。A采用 PAM 方式的通信系统B采用 SSB方式的通信系统C采用 VSB 方式的通信系统D采用 PCM 方式的通信系统9在 数字通信系统中， 传输速率 属于通信系统性能指标中的（ A ） 。A有效性B可靠性C适应性D标准性10以下属于码元速率单位的是（ A ） 。A波特B比特C 波特 /s D比特 /s11在 模拟通信系统中，

18、传输 带宽 属于通信系统性能指标中的（ B ） 。A可靠性B有效性 C适应性 D标准性12产生频率选择性衰落的原因是（C ） 。A幅频畸变相频畸变C多径传播瑞利衰落13若采用空间分集技术，抗选择性衰落较差合并方式为（A ） 。A最佳选择方式最大功率合并方式C最小色散合并方式最大信噪比合并方式14以下属于恒参信道的是（ D ） 。A微波对流层散射信道B超短波电离层散射信道C短波电离层反射信道D微波中继信道15改善恒参信道对信号传输影响的措施是（C ） 。A采用分集技术B提高信噪比C采用均衡技术D降低信息速率16随参信道所具有的特点是（ D ） 。A多经传播、传输延时随时间变化、衰落B传输损耗随时

19、间变化、多经传播、衰落C传输损耗随时间变化、传输延时随时间变化、衰落D传输损耗随时间变化、传输延时不随时间变化、多经传播17根据信道的传输参数的特性可分为恒参信道和随参信道，恒参信道的正确定义是（B ） 。A信道的参数不随时间变化B信道的参数不随时间变化或随时间缓慢变化C信道的参数随时间变化D信道的参数随时间快速变化18以下信道属于随参信道的是（ B ） 。A电缆信道B短波信道C光纤信道D微波中继信道19调制信道的传输特性不好将对编码信道产生影响，其结果是对数字信号带来（B ） 。A噪声干扰B码间干扰C突发干扰D噪声干扰和突发干扰精选学习资料 - - - - - - - - - 名师归纳总结

20、- - - - - - -第 1 页，共 35 页We will continue t o improve the companys internal control system, and steady improvement in ability to manage and control, optimize business processes, to ensure smooth processes, responsibilities in place; to further strengthen internal controls, play a control post indepe

21、ndent oversight rol e of evaluation complying with third-party responsibility; to actively make use of internal audit tools detect potential management, streamline, standardize related transactions, strengthening operations in accordance with law. Deepening t he information management to ensure full

22、 communication zero resistance. o constantly perfect ERPand BFS+, and PI, and MIS, and SCM, information system based construction, full integration information system, achieved information resources shared; to expand Portal system application of breadth and depth, play information system on enterpri

23、se of Assistant role; to perfect daily run maintenance operation of records, promote problem reasons analysis and system handover; to strengtheni ng BFS+, and ERP, and SCM, technology appli cation of training, improve employees a pplication information system of capacity and level. Humanistic care t

24、 o ensure zero. To strengthening Humanities care, continues to foster company wind clear, and gas are, and heart Shun of culture atmosphere; strengthening love helpe d trapped, care difficult employees; carried out style activities, rich employees life; strengthening health and labour protection, or

25、ganization career health medical, control career against; continues to implementation psychological warning prevention system, training employees health of character, and stable of mood and enterprising of attitude, created friendly fraternity of Humanities environment. To strengthen risk management

26、, ensure that the business of zero risk. To strengthene d business plans management, will business business plans cover to all level, ensure the business can control in contr ol; to close concern financial, and coal electric linkage, and energy-saving scheduling, national policy trends, strengthenin

27、g track, active should; to implementation State-owned a ssets method, further spe cification business financial management; to perfect risk tube control system, achieved risk recognition, and measure, and assessment, andreport, and control feedba ck of close d ring management, improve risk preventio

28、n capacity. To further standardize trading, and strive to achieve according to law, sta ndardize and fair. Innovation of performance management, to ensure that potential employees zero fly. To strengthen performance management, process control, enha nce employee evaluation and levels of effective co

29、mmunication to improve performance management. To further quantify and refine employee standards . Work, full play party, and branch, and members in five type Enterprise construction in the of core role, and fighting fortress role and pioneer model role; to continue s to strengthening four good lead

30、ership construction, full play levels cadres in e nterprise development in theof backbone backbone role; to full strengthening members youth work, full play youth employees in company development in the of force role; to improve independent Commission against corruption work level, strengthening on

31、enterprise business key link of effectiveness monitored. , And maintain stability. To further strengthen publicity and education, improve the overall legal system. We must strengthen safety management, establish and im prove the education, supervision, and evaluation as one of the traffic safety man

32、agement mechanism. o conscientiously sum up the Olympic security controls, promoting integrated management to a higher level, higher standards, a higher level of development. Employees, today is lunar calendar on December 24, the ox Bell is about to ring, at this time of year, we clearly feel the pu

33、lse of the XX power generation company to flourish, to more clearly hear XX power generation companies mature and symmetry breathing. Recalling past one anot her across a railing, we are enthusiastic and full of confidence. Future development opportunities, we more exciting fight more spirited. Empl

34、oyees, let us together across 2013 full of challenges and opportunities, to create a green, low-cost operation, full of humane care of a world-class power generation company and work hard! The occasion of the Spring Festival, my sincere wish that you and the families of the staff in the new year, go

35、od health, happy, happy20改善随参信道对信号传输影响的措施是（B ） 。A提高信噪比B采用分集技术C采用均衡技术 D降低信息速率21连续信道的信道容量将受到“ 三要素 ” 的限制，其 “ 三要素 ” 是（ B ） 。A带宽、信号功率、信息量B带宽、信号功率、噪声功率谱密度C带宽、信号功率、噪声功率D信息量、带宽、噪声功率谱密度22以下不能无限制地增大信道容量的方法是（ D ） 。A无限制提高信噪比B无限制减小噪声C无限制提高信号功D无限制增加带宽23根据 香农公式 以下关系正确的是（A ） 。A信道容量一定，信道的带宽越宽信噪比的要求越小；B信道的容量与信道的带宽成正比

36、；C信道容量一定，信道的带宽越宽信噪比的要求越高；D信道的容量与信噪比成正比。24设基带信号频谱如右图所示，以下模拟调制后的频谱中抑制载波的双边带调幅(DSB)是（ B ） 。A. B. C. D. 25设基带信号频谱如右图所示，以下模拟调制后的频谱中属于单边带调幅（ SSB ）的是（ C ） 。ABCD26设已调制信号的波形如图所示，其中属于SSB波形是（C ） 。ABCD27设已调制信号的波形如图所示，其中属于DSB 波形的为（B ） 。AB CD28模拟调幅中DSB 、SSB、VSB 的已调信号所 占用带宽大小 关系为（B ） 。ADSBSSBVSB DSB VSB SSB CSSBDS

37、BVSB VSB SSB DSB29以下不属于 线性调制 的调制方式是（ D ） 。AAM DSB CSSB FM30各模拟线性调制中，已调信号占用频带最小 的调制是（C ） 。AAM BDSB CSSB DVSB31在等概的情况，以下数字调制信号的功率谱中不含有离散谱的是（ D ） 。AASK BOOK CFSK DPSK 32设某传输码序列为+1-100-1+100+1-1000-1+100-1，在接收端正确恢复出的数字序列为（D ） 。AC33设某传输码序列为0-20+2+2000-2-2-2，在接收端正确恢复出的数字序列为（B ） 。AB CD34设某传输码序列为0-20+2+2000

38、-2-2-2 ，该传输码属于（ A ） 。A相关码B差分码C双相码D绝对码35设某传输码序列为+1-10000+100-1+100-1+100-1 ，该传输码属于（D ） 。ARZ 码BHDB3 码 CCMI码 DAMI 码36设某传输码序列为+1-100-1+100+1-1000-1+100-1，该传输码属于（C ） 。AAMI 码CMI 码C码 RZ 码37我国 PCM 数字设备间的传输接口码型是（ B ） 。AAMI 码BHDB3 码 CNRZ码 DRZ 码38以下数字码型中，功率谱中含有时钟分量码型为（ B ） 。ANRZ 码BRZ 码CAMI 码DHDB3 码精选学习资料 - - -

39、 - - - - - - 名师归纳总结 - - - - - - -第 2 页，共 35 页We will continue t o improve the companys internal control system, and steady improvement in ability to manage and control, optimize business processes, to ensure smooth processes, responsibilities in place; to further strengthen internal controls, play a

40、 control post independent oversight rol e of evaluation complying with third-party responsibility; to actively make use of internal audit tools detect potential management, streamline, standardize related transactions, strengthening operations in accordance with law. Deepening t he information manag

41、ement to ensure full communication zero resistance. o constantly perfect ERPand BFS+, and PI, and MIS, and SCM, information system based construction, full integration information system, achieved information resources shared; to expand Portal system application of breadth and depth, play informatio

42、n system on enterprise of Assistant role; to perfect daily run maintenance operation of records, promote pro blem reasons analysis and system handover; to strengthening BFS+, and ERP, and SCM, technology appli cation of training, improve employees a pplication information system of capacity and leve

43、l. Humanistic care t o ensure zero. To strengthening Humanities care, continues to foster company wind clear, and gas are, and heart Shun of culture atmosphere; strengthening love helpe d trapped, care difficult employees; carried out style activities, rich employees life; strengthening health and l

44、abour protection, organization career health medical, control career against; continues to implementation psychological warning prevention system, training employees health of character, and stable of mood and enterprising of attitude, created friendly fraternity of Humanities environment. To streng

45、then risk management, ensure that the business of zero risk. To strengthene d business plans management, will business business plans cover to all level, ensure the business can control in contr ol; to close concern financial, and coal electric linkage, and energy-saving scheduling, national policy

46、trends, strengthening track, active should; to implementation State-owned a ssets method, further spe cification business financial management; to perfect risk tube control system, achieved risk recognition, and measure, and assessment, andreport, and control feedba ck of close d ring management, im

47、prove risk prevention capacity. To further standardize trading, and strive to achieve according to law, sta ndardize and fair. Innovation of performance management, to ensure that potential employees zero fly. To strengthen performance management, process control, enha nce employee evaluation and le

48、vels of effective communication to improve performance management. To further quantify and refine employee standards . Work, full play party, and branch, and members in five type Enterprise construction in the of core role, and fighting fortress role and pioneer model role; to continue s to strength

49、ening four good leadership construction, full play levels cadres in e nterprise development in theof backbone backbone role; to full strengthening members youth work, full play youth employees in company development in the of force role; to improve inde pendent Commission against corruption work lev

50、el, strengthening on enterprise business key link of effectiveness monitored. , And maintain stability. To further strengthen publicity and education, improve the overall legal system. We must strengthen safety management, establish and im prove the education, supervision, and evaluation as one of t