2012河北省专接本通信原理试题
感谢王君丽、栗凌飞整理，刘庆等移动15班同学录入
一、选择
1、下列那照片那个地址码含有定位信息（）。
A、RZ
B、双极性归零码
C、HDB3码
D、单极性不归零码
2、若想使系统频带利用率高，则应采用（）调制。
A、DSB
B、AM
C、SSB
D、VSB
3、（）技术是下一代的新技术。
A.、OFDM B、CDMA C、TDM A D、FDMA
4、对PSK、DPSK、FSK抗噪声性能排序正确的是（）
5、想增大系统容量到最大，下列哪种方法不可取（）
A、减小噪音
B、无限增加系统带宽
C、增加发射功率
D、……
6、8PSK的最高频带利用率为（）
7、高斯白噪声经过线性窄带系统则输入服从（）
A、高斯分布
B、瑞丽分布
C、均匀分布
D、…
8、QAM的名称是（）
9、△M调制中出现过载现象，若想减小过载噪声可采用（）
A、减小抽样频率
B、减小抽样周期
C、减小量化台阶
D、…
二、填空：
1.、某四进制数字系统码元宽度T=0.5ms，则它的码元速率——，信息速率——，若半个小时接收了360个错误码元，则该系统的误码率——。
2.A律13折线中，常数A=——。
3.同步包括——、——、群同步、网同步。
4.码序列101100的码重为——，与101011的码距为——。
5.为了消除码间干扰，改善频谱特性，加速波形尾巴的衰减，这种波形称为——波形。
6.AM包络解调时小信噪比情况下，可出现——。
三．判断：
1.严平稳随机过程必是广义平稳的，反之不成立。
2电话是双工通信方式。
3 概率是信息量的函数。
4 模拟信号数字化先经过抽样再进行量化编码。
5 2PSK、2DPSK、2FSK中，2FSK频带利用率最高。
6 FM调制时以增大带宽为牺牲换取大的信噪比。
四．简答：
1.为了消除码间干扰，基带传输系统的传输函数应满足什么条件？其相应的冲激响应应具有什么特点？
2.数字调制信号的产生的方法有哪两种？用其中一种方法画出ASK调制方框图，并画出110010对应的2ASK波形？
3.何为匹配滤波？试问匹配滤波器的冲激响应和信号波形有何关系？其传输函数和信号频谱又有关系？
五大题（每个10分）
1设一个随机相位的正弦波φ（t）=2cos(4πt+θ);θ是在（0,2π）内均匀分布的随机变量。试讨论ф（t）是否具有各态历经性，并求其功率谱密度。
2 设某信道具有均匀的双边噪声功率谱密度Pn(f)=0.5*10-3W\HZ,在该信道中传输抑制载波的单边带（上边带）信号，并设调制信号m(t)的频带限制在5KHZ，而载频是100KHZ，已调信号功率是10KHZ。若接收机的输入信号在加至解调器之前，先经过带宽为5KHZ的理想带通滤波器，试问：
（1）该理想带通滤波器为传输函数H(w)
(2) 解调器输入端的信噪功率比为多少？
（3）解调器输出端的信噪比为多少？
3、采用13折线A律编码器，设最小量化间隔为1个单位，已知抽样脉冲值为-91，单位：
（1）试求此时编码器输出码组，并计算量化误差。
（2）写出该量化值若采用均为量化则输出码为？
4、已知（7，3）线性分组码的生成矩阵为
求：（1）所有的码字
（2）监督矩阵
（3）最小码矩及纠、检能力
（4）编码效率
2012 年专业英语考试试题及参考答案 Part Ⅰ Vocabulary and Structure (1×30 points) Directions：There are 30 incomplete statements in this part. You are required to complete each one by choosing the most appropriate word or expression from the four choices marked A, B, C and D, then mark the corresponding letter on the ANSWER SHEET. 19.are said to be the world’s best watch makers. A. Swisses B. The Swisses C. The Swiss D. Swiss 20.is no reason for discharging him. A. Owing to a few minutes late B. Due to a few minutes late C. Because he was a few minutes late D. The fact that he was a few minutes late 21.These books can give a(n) to children’s reading when they find that they c an read a familiar story with limited vocabulary. A. boost B. impact C. effect D. sense 22.To our horror, we found that the room of death, with dried blood on the floor. A. related B. involved C. smelled D. connected 23.People have to make for their old age by putting aside enough money to l ive on when old. A. supply B. provision C. assurance D. adjustment 24.The rattlesnake is now on the endangered species list, and is extinct in two eastern states where it once . A. thrived B. swelled C. prospected D. flourished 25.I am not with my roommates but I have to share the room with them, because I have nowhere else to stay. A. concerned B. compatible C. considerate D. complied 26.A of the long report by the budget committee was submitted to the mayor for approval. A. shorthand B. scheme C. schedule D. sketch 27.The manager gave one of the salesgirls an accusing look f or her attitude toward customers. A. impartial B. mild C. hostile D. opposing 28.A few miles down the road Joe saw a cafe, and went i n to a bite to eat. A. squeeze B. seize C. grab D. catch 29.He has failed me so many times that I no longer p lace any on what he promises. A. faith B. belief C. confidence D. reliance 30.They believe that cameras in public places are helpful in fighting crimes and they do not really privacy.
2012河北省专接本通信原理试题 感谢王君丽、栗凌飞整理，刘庆等移动15班同学录入 一、选择 1、下列那照片那个地址码含有定位信息（）。 A、RZ B、双极性归零码 C、HDB3码 D、单极性不归零码 2、若想使系统频带利用率高，则应采用（）调制。 A、DSB B、AM C、SSB D、VSB 3、（）技术是下一代的新技术。 A.、OFDM B、CDMA C、TDM A D、FDMA 4、对PSK、DPSK、FSK抗噪声性能排序正确的是（） 5、想增大系统容量到最大，下列哪种方法不可取（） A、减小噪音 B、无限增加系统带宽 C、增加发射功率 D、…… 6、8PSK的最高频带利用率为（） 7、高斯白噪声经过线性窄带系统则输入服从（） A、高斯分布 B、瑞丽分布 C、均匀分布 D、… 8、QAM的名称是（） 9、△M调制中出现过载现象，若想减小过载噪声可采用（） A、减小抽样频率 B、减小抽样周期 C、减小量化台阶 D、… 二、填空： 1.、某四进制数字系统码元宽度T=0.5ms，则它的码元速率——，信息速率——，若半个小时接收了360个错误码元，则该系统的误码率——。 2.A律13折线中，常数A=——。 3.同步包括——、——、群同步、网同步。 4.码序列101100的码重为——，与101011的码距为——。 5.为了消除码间干扰，改善频谱特性，加速波形尾巴的衰减，这种波形称为——波形。 6.AM包络解调时小信噪比情况下，可出现——。 三．判断： 1.严平稳随机过程必是广义平稳的，反之不成立。 2电话是双工通信方式。 3 概率是信息量的函数。 4 模拟信号数字化先经过抽样再进行量化编码。 5 2PSK、2DPSK、2FSK中，2FSK频带利用率最高。 6 FM调制时以增大带宽为牺牲换取大的信噪比。 四．简答： 1.为了消除码间干扰，基带传输系统的传输函数应满足什么条件？其相应的冲激响应应具有什么特点？ 2.数字调制信号的产生的方法有哪两种？用其中一种方法画出ASK调制方框图，并画出110010对应的2ASK波形？ 3.何为匹配滤波？试问匹配滤波器的冲激响应和信号波形有何关系？其传输函数和信号频谱又有关系？ 五大题（每个10分） 1设一个随机相位的正弦波φ（t）=2cos(4πt+θ);θ是在（0,2π）内均匀分布的随机变量。试讨论ф（t）是否具有各态历经性，并求其功率谱密度。
2012年英语专业四级考试真题 PART I DICTATION [15 MIN] Listen to the following passage．Altogether the passage will be read to you four times．During the first reading, which will be done at normal speed, listen and try to understand the meaning．For the second and third readings，the passage will be read sentence by sentence, or phrase by phrase，with intervals of 15 seconds．The last reading will be done at normal speed again and during this time you should check your work．You will then be given 2 minutes to check through your work once more．Please write the whole passage on ANSWER SHEET ONE． PART II LISTENING COMPREHENSION [20 MIN] In Sections A,B and C you will hear everything ONCE ONLY. Listen carefully and then answer the questions that follow．Mark the best answer to each question on Answer Sheet Two． SECTION A CONVERSATIONS In this section you will hear several conversations．Listen to the conversations carefully and then answer the questions that follow． Questions l to 3 are based on the following conversation．At the end of the conversation, you will be given 15 seconds to answer the questions．Now, listen to the conversation. l．The Ethical Consumer Research Association will provide information to shoppers on A．product price． B．product quality． C．manufacturers． D．production methods． 2．According to the conversation，an ethical shopper should A．ask for others’advice before buying things．
英语 注意事项： 1.试卷共8页，请用黑色签字笔答题，答案写在答题纸上，写在试卷上无效。 2.答题前请将答题纸上密封线内的项目填写完整。 PartI Vocabulary and Structure(1 point each;30 point in all) Directions:There are 30 incomplete sentences. You are required to complete each one by deciding on the most appropriate word or words from the four choices marked A,B,C and D,and then write the write the corresponding letter on the Answer sheet. 1.—Hello, ____ Kate？ —Yes, speaking. A. is this B. is that C. are you D. is it 2. By the time I got home, my mother ____ to bed. A. went B. was getting C. had gone D. has gone 3 ____ everything ____ ，it was not a bad holiday. A. brining--into effects B. learning--by heart C. petting--into practice D. taking--into account 4. When waiting at a bus stop for a long time, most people often look ____ and asleep. A. bored B. surprised C. excited D. amused 5. ____ the effective method , I answered all the questions correctly. A. Thanks to B. In case of C. As well as D.Apart from 6. If you are like most people , your intelligence ____ from season to season. A. turns B. change C. varies D. ranges 7. No cream hot me, thanks. I am ____ a diet. A. in B. on C. from D. off 8. ____ really worries George is that his parents expect too much of him. A. What B. This C. Whichever D. It 9.Mary loves Jazz, and she has played ____ for years. A. piano B. a piano C. one piano D. the piano 10.Ted made up has mind soon and accepted the invitation ____ . A. without hesitation B. without doubt C.without understanding D. without exception 11.It is good manners ____ help to others when they are in need. A. to obtain B. obtaining C. to offer D. offering 12. ____ you've grown your favorite flowers, the following job is to take care. A. Although B. Before C. While D. 13. Huangshan Mountain is really a magnificent place for an enjoyable and ____ vacation. A.dull B. annual C. relaxing D. noisy https://www.doczj.com/doc/0418524183.html,ura ____ her parents travel abroad once a year. A. and B. together with C. as well as D. accompanied by
河北省专接本历年录取分数线（2003年-2013年） 2003年专科接本科教育选拔分数线 文史、医学类：外语：60分政治：43分 理工类：外语：60分数学：45分 财经、管理类：外语：60分数学：40分 艺术、体育类：外语：43分 英语类：政治：45分 2004年专接本考试公共课最低控制分数线 文史类：外语：70分政治：60分 医学类：外语：70分政治：60分 理工类：外语：60分高数：40分 财经管理类：外语：70分高数：60分 艺术类：外语：50分 体育类：外语：50分 英语类：政治：70分 2005年河北省专接本考试分数线 专业类别英语政治数学 文史类63 50 法学68 54 医学类65 52 临床医学74 59 英语类65 理工类45 36 财经类56 45 管理类55 44 农学类40 30 艺术类40 体育类35 河北省2006年专科接本科教育选拔考试公共课最低控制分数线 一、文史类：（公共课考试科目：外语、政治） 分数线（外语成绩＋政治成绩）:107分 二、医学类（不含临床医学专业）：（公共课考试科目：外语、政治） 分数线（外语成绩＋政治成绩）:113分 医学类（临床医学专业）：（公共课考试科目：外语、政治） 分数线（外语成绩＋政治成绩）: 130分
三、理工类（不含计算机专业）：（公共课考试科目：外语、高等数学一）分数线（外语成绩＋高数一成绩）: 79分 理工类（计算机专业）：（公共课考试科目：外语、高等数学一） 分数线（外语成绩＋高数一成绩）: 94分 四、财经类：（公共课考试科目：外语、高等数学二） 分数线（外语成绩＋高数二成绩）: 113分 五、管理类（不含会计学专业）：（公共课考试科目：外语、高等数学三）分数线（外语成绩＋高数三成绩）: 105分 管理类（会计学专业）：（公共课考试科目：外语、高等数学三） 分数线（外语成绩＋高数三成绩）: 132分 六、艺术类（公共课考试科目：外语） 分数线（外语成绩）: 33分 七、体育类（公共课考试科目：外语） 分数线（外语成绩）: 25分 八、英语类（公共课考试科目：政治） 分数线（政治成绩）: 60分 九、农学类：（公共课考试科目：外语、高等数学三） 分数线（外语成绩＋高数三成绩）: 63分 2007年专接本考试公共课最低控制分数线 一、文史类：外语+政治128分 二、医学类（不含临床医学专业）：外语+政治123分 临床医学专业：外语+政治138分 三、理工类：外语+高数130分 四、财经类：外语+高数120分 五、管理类（不含会计学专业）：外语+高数140分 会计学专业：外语+高数152分 六、艺术类：外语54分
2012年河北专接本英语最新题型挖空题 Passage 1 Learning a foreign language requires action. Here are some ___1___ for you to follow. The most important factor for success is to be enjoyably ____2___ in the language. The next thing you need to do is listen to and read things that ___3__ you everyday, though you may not necessarily __4__ everything. Meanwhile, build up your __5__ through listening and reading. Another thing to remember is that you should take __6__ for your own learning. A teacher cannot make you __7__, but you can learn to become a fluent speaker if you can take __8__. Sometimes you may find yourself unable to __9__ or understand what you are learning. Do not worry about it. Relax and __10__ yourself. You may find things clearer in your brain later. Passage 2 Still not sure why you should be learning a foreign language? Here are 5 very good __1__. First, a foreign language make you __2__ your mother tongue better. You will speak and write more __3__ and creatively. Next, it helps you to get the most out of your travel __4__. You will meet more people and get __5__more easily. Besides, by learning another language, you are learning a new way to __6__ and a new way to sing. Believe it or not, well over four-fifths of the world’s __7__ does not speak enligh. Learning another language opens up new opportunities and gives you an __8__ in business and personal relationships. Last but not __9__, personal considerations like seeking a girlfriend also point to the advantages of learning a __10__ language. Passage 3 Entering college is like starting a new __1__ of your life. Everything is new. Everyone is __2__. Until you get to college, it rarely occurs to you that life could be any __3__ ----until you find yourself surrounded by hundreds of students just like you. You are expected to get used to the new
PART III CLOZE 【15 MIN】 1 2 Decide which of the choices given below would best complete the 3 passage if inserted in the corresponding blanks. Mark the best choice for 4 each blank on Answer Sheet Two. 5 6 The earthquake of 26th December 2004 resulted in one of the worst 7 natural disasters in living memory. It was a (31) _____ underwater quake 8 and occurred in the Indian Ocean. It (32) ____ coastlines，communities 9 and brought death to many people. 10 11 Why do earthquakes happen? 12 13 The surface of the earth has not always looked as it does today; it 14 is moving(33)____ (although very slowly)and has done so for billions of 15 years. This is one(34)____ of earthquakes，when one section of the earth 16 (tectonic plate)(35)____ another. Scientists can predict where but 17 not(36)____ this might happen and the area between plates is called a fault 18 line. On one fault line in Kobe，Japan in 1923 over 200,000 people were 19 killed.(37)____，earthquakes do not always happen on fault lines，(38)____ 20 is why they are so dangerous and (39)____. 21 22
2012年辽宁高职高专毕业生专升本考试英语试卷 第一部分选择题 一、词汇与语法 根据句意及语法要求从媒体A、B、C、D四个选项中，选出一个最适合的答案填空，并在答题卡上将所选答案的字母涂黑。（本大题共10，每小题1分，共10分） 1.The little boy______ the road when he was hit by a bus. A.was just crossed B.was just crossing C.just cross D.had just crossed 2.—I saw Mary in the hospital yesterday. A.must not see B.can’t have seen C.mustn’t have seen D.couldn’t see 3.On seeing the skirt,I will pay $40 for it;it’s worth _____. A.all that much B.that much all C.that all much D.much all that 4.According to the map ,I know this street is three times as________as that one. A.long B.longer C.longest D.the longest 5.The little boy is only 5 years old.He needs ___________. A.being looked after B.looked after C.looking after D.to look after 6.The elephant ought _____hours ago by the keepers. A.to be fed B.to feed C.to being fed D.to have been fed 7.When Lily asked me whether I had been to china,I told her,”______enough money,I would have visited china.” A.Have I B.I have C. Had I had D.I had 8.He spends all his spare time collecting stamps.He says that by the end of the next year,he____3000 pieces. A.will have collected B.is going to collect C.will be collecting D.is about to collect 9.Although an old lady of 70,her grandma is still fond of reading_______. A.stories of childrens B.children stories C.childrens’ stories D.chlidren’s stories 10.The Olympic Games,_____in 776 B.C.,did not include women players until 1912. A.frist playing B.to be frist played C.frist played D. to be frist playing 二、阅读理解 根据短文内容从每题A.B.C.D.四个选项中，选出一个最适合的答案，并在答题卡上将所选答案的字母涂黑。（本大题共15小题，每小题三分，共45分） Passage 1 Artificial Satellites are any objects that were purposefully put in space to orbit (绕轨道) around a planet ,the Moon, or the Sun .The satellites are used for communication,militart intelligence, and scientific studies of outer space.The frist artificial satellite was launched in 1957, and since tnen,satellites have become an invaluable part of today’s technologh.
2012年河北专接本英语模拟题[1] 英语模拟题 河北省普通专科接本科教育考试第一套答案 1. B 2. D 3. D 4. A 5. B 6.C 7. B 8. A 9. D 10. A 11. F 12.D 13. A 14. B 15. E16.A17. D 18. D 19. D 20. B 21. A 22. C 23. B 24. B 25. C 26. A 27. A 28. D 29. C 30. A 31.B 32. D 33. B 34. A 35. C 36. A 37. A 38. D 39. D 40. C41. B 42. C43. C 44. B 45. B 46—50 BDABD 51—55 ABCCD 56—60 DACCC 61—65 ABBCA 66—70 DADBC 71—75 ACBDA 76—80 DCACB 81( having ever seen this car anywhere. 82. who will chair tomorrow’s meeting. 83. If he had not quitted the job, 84. to hold so many people. 85. Not until she came home did. 第二套答案 1—5 DCBDC 6—10 CADCB 11—15 CGBEA 16—20 CABCD 21—25 DABBD 26—30 ACBDC 31—35 DBDBC 36—40 BCDAD 41—45 ACAAC 46—50 DDBCA 51—55 BCAAD 56—60 CDDBC 61—65 BDACA 66—70 DDCDA 71—75 BCDBC 76—80 BAACD 81( is half as large as the Pacific. 82. Children used to be taken care of by their mother. 83., he should not have made the mistake. 84. that has greatly raised our living standard. 85. vary from a few dollars to several hundred. 第三套答案
Passage 1 Learning a foreign language requires action. Here are some ___1___ for you to follow. The most important factor for success is to be enjoyably ____2___ in the language. The next thing you need to do is listen to and read things that ___3__ you everyday, though you may not necessarily __4__ everything. Meanwhile, build up your __5__ through listening and reading. Another thing to remember is that you should take __6__ for your own learning. A teacher cannot make you __7__, but you can learn to become a fluent speaker if you can take __8__. Sometimes you may find yourself unable to __9__ or understand what you are learning. Do not worry about it. Relax and __10__ yourself. You may find things clearer in your brain later. Passage 2 Still not sure why you should be learning a foreign language? Here are 5 very good __1__. First, a foreign language make you __2__ your mother tongue better. You will speak and write more __3__ and creatively. Next, it helps you to get the most out of your travel __4__. You will meet more people and get __5__more easily. Besides, by learning another language, you are learning a new way to __6__ and a new way to sing. Believe it or not, well over four-fifths of the world’s __7__ does not speak enligh. Learning another language opens up new opportunities and gives you an __8__ in business and personal relationships. Last but not __9__, personal considerations like seeking a girlfriend also point to the advantages of learning a __10__ language. Passage 3 Entering college is like starting a new __1__ of your life. Everything is new. Everyone is __2__. Until you get to college, it rarely occurs to you that life could be any __3__ ----until you find yourself surrounded by hundreds of students just like you. You are expected to get used to the new __4__ and learn to stand on your own two feet. You’ll have to learn how to handle different people and different __5__. Here you will also find things will not always work in your __6__. So __7__ yourself for hardships and setbacks. Social communication is an important part of your college life. Good __8__ with others can help to make th4e most of your college life. Here you are considered as an __9__. You make all of your own decisions or plans and you are __10__ for the consequences.
2012专四听写参考答案 Nowadays, many of us try to live in a way that will damage the environment as little as possible. We recycle our newspapers and bottles, we take public transport to get to work, we try to buy locally produced fruit and vegetables，and we want to take these attitudes on holiday with us. This is why alternative forms of tourism are becoming popular in the world. There are a lot of names for these new forms of tourism: responsible tourism, nature tourism, adventure tourism, educational tourism and more. Although everyone may have a different definition, most people agree that these new forms of tourism should do the following: first, they should conserve the wildlife and culture of the area; second, they should benefit the local people; third, they should make a profit without destroying natural resources; and finally they should provide an experience that tourists want to pay for. 2012专四听力参考答案
2012年河南省普通高等学校 选拔优秀专科毕业生进入本科阶段学习考试试题 公共英语 Part I Vocabulary and Structure (40 points) Directions: There are 40 incompletesentences in this part. For each sentence there are four choices marked A, B, C and D. Choose theONE that best completes the sentence,and then you should mark the corresponding letter on theAnswer Sheet. 1. The police are _____ for the thief inthe region now. A. running B.reaching C. searching D.charging 2. What is the reason for _____ on time ? A. not your coming B. you not come C. your not coming D. you not to come 3. The college is planning to offer moreEnglish courses to _____ the needs of beginners of English. A. meet with B. meet C. supply D. satisfywith
4. He kept silent, so I couldn`t know _____he agreed _____ not. A. if; or B. whether; or C. either; or D.neither; nor 5. He had never given a speech to so manypeople, so he felt _____. A. exciting B. stupid C. disappointed D.nervous 6. Once you arrive in a new place, you`dbetter _____ the local custom. A. keep B. make C. follow D. return 7. The manner _____ which he talkedreminded us _____ his grandfather. A. on; towards B. at; in C. for; by D. in;of 8. All of us still remember the terribleearthquake that _____ Wenchuan four years ago. A. interrupted
PART I DICTATION [15 MIN] Listen to the following passage．Altogether the passage will be read to you four times．During the first reading, which will be done at normal speed, listen and try to understand the meaning．For the second and third readings，the passage will be read sentence by sentence, or phrase by phrase，with intervals of 15 seconds．The last reading will be done at normal speed again and during this time you should check your work．You will then be given 2 minutes to check through your work once more．Please write the whole passage on ANSWER SHEET ONE． PART II LISTENING COMPREHENSION [20 MIN] In Sections A,B and C you will hear everything ONCE ONLY. Listen carefully and then answer the questions that follow．Mark the best answer to each question on Answer Sheet Two． SECTION A CONVERSATIONS In this section you will hear several conversations．Listen to the conversations carefully and then answer the questions that follow． Questions l to 3 are based on the following conversation．At the end of the conversation, you will be given 15 seconds to answer the questions．Now, listen to the conversation. l．The Ethical Consumer Research Association will provide information to shoppers on A．product price． B．product quality． C．manufacturers． D．production methods． 2．According to the conversation，an ethical shopper should A．ask for others?advice before buying things． B．consider the worth of something to be bought． C．postpone buying things whenever possible． D．search for things that are less costly．