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一、阅读理解（共1道小题，共25.0分） 1. A pretty, well―dressed young lady stopped a taxi in a big square, and a said to the driver, "Do you see that young man at the other side of the square?" "Yes," said the taxi driver. The young man was standing outside a restaurant and looking impatiently (不耐烦地) at his watch every few seconds. "Take me over there," said the young lady. There were a lot of cars and buses in the square, so the taxi driver asked, "Are you afraid to cross the street?" "Oh, no!" said the young lady. "But I promised that I would meet the young man for lunch at one o' clock, and it is now a quarter to two. If I arrive in a taxi, it will at least seem as if I had tried not to be late." 1.How did the young woman get to the square? A.She arrived in a taxi. B.She drove there in a car. C.She got there by bus. D.The story doesn't tell us. 2.Why did the lady stop the taxi? A.Because she didn't want to be late for her appointment (约会). B.Because she wanted to get out of the taxi. C.Because she wanted to go to the restaurant in it. D.Because she was afraid of walking across the street. 3.The young man at the other side of the square_______. A.had probably been waiting for a long time B.had some problem with his watch C.was probably a waiter of the restaurant D.was someone the young lady didn't want to see 4.The young lady was_______. A.clever at making excuse B.not late at all C.45 minutes earlier D.15 minutes late 5.Had she tried not to be late? A.Yes, she had tried her best. B.No, she was just pretending that she had tried. C.Yes, she had tried but she was still late. D.No, she thought being late was better than being early.
这是我以前到处搜刮来的，自己看看吧。 唐老师是中国网通集团宽带业务应用国家工程实验室副总共,兼职导师,硕士只有两个名额,博士有一个名额, 05年上院线的4个人都要了,06年,竞争比较激烈分比较高,07年上院线的4个,唐老师只有两个名额,要了两个,并且帮另外两个同学调剂到其他导师那里.08年,只有一个报考唐老师的上线,唐老师接受了一个调剂的. 其实所谓的方向,都是遇到什么做什么,并非那么死. 如果跟唐老师读研的话,运营商的各个方向,只要有兴趣,老师都会尽量给你实习的机会. 另外,如果能找到更好的实习机会或者出国,唐老师一定会积极鼓励的. 往年： 大宋（含宋梅）老师 350+ 刘杰老师350+ （这些年有刘杰老师偏高大宋老师走低的趋势） 老邓院长那320（招不满的情况下就另计了，会择优收一些调剂） 张校长（含王卫东老师） 320 新来的刘元安院长（含唐碧华老师）没有往年参考数据，前电院四小龙分低不了吧呵呵 新来的继教的老师没有参考数据不详 吕奶奶（依每年看情况不详） 光方向（不详） 写在前面的话：整个暑期都泡在北邮人考研版上，发现很多同学对与考研问题不断，但问题的重复率也很高，因此对此稍做整理，方便同学考研解惑，希望对你们有帮助 注：以下问题及其答案大部分都是在版块内搜集的，如有错误欢迎大家纠正 因为北邮院系改革，而且很多老师都没有到位，因此报考专业可能出现变化，一切以即将出的09招生简章为准
Q：北邮的研究生报考时给其他学校不一样，要先报导师，但不知道具体怎么回事 A：08时的计算机，使用的是报导师组（就是选定一个专业方向）的方式。如果考上了，那么复试就是在导师组内复试，调剂也优先考虑组内调剂，不行才会考虑组外调剂。 Q：北邮是否有专业课辅导班？如何报考？ A：北邮本校是没有专业课辅导班。所谓的通原辅导班是由外面辅导机构所办。海文和北邮合作的专业课辅导是李莉，李宗豪讲，是北邮代课老师。但是在下特此声明，命题的老师不会也不可能出来讲课的，这是不允许的。 Q：该什么时候联系导师啊？ A：保研的现在研究；考研的在报考前考虑一下，实际加紧联系就在出成绩那段时间了。 Q：请问院系重组对研究生学院有什么影响？ A：暂时未知，有消息及时通知 Q：北邮计算机今年复试是不是要上机？ A：08头一年上机，明年应该还会有 Q：08年电院分数线是多少？其他学院呢？ A：电院320 信院305 计科300 电子300 Q:非应届毕业生一定要去北邮参加研究生考试么？ A:答：不需要，各地有考试点 Q：信息工程院的密码学怎么样，专业课是考高等代数吗？ A：信号通原数学都行，只有专业，导师到时候再分配 Q：电信工程院有哪些牛导？ A：在外界看来电院最厉害的是三大牛导：张平王文博杨大成 Q：北邮考研有歧视吗？ A：没有。这个问题很多人问过，老师一律平等对待，好好考好初试。 Q:北邮哪个老师做嵌入式的比较牛？ A：邝坚 Q：复试的时候导师主要以什么作参考？导师比较看重什么？比如项目经验，学校？ A：每个导师看中的方面都不一样，无法回答。好好过了初试再去费心复试的问题
一、完形填空（共1道小题，共50.0分） 1.Once, three fishes lived in a pond. One evening, some ___1___ passed by the pond and saw the fishes. “This pond is full of fish”, they told each other __2___. “We have never fished here before. We must come back tomorrow morning with our ___3___ and catch these fish!” So saying, the fishermen left. When the eldest of the three fishes ___4___ this, he was troubled. He called the other fishes together and said, “Did you hear ___5___ the fishermen said? We must leave this pond at once. The fishermen will return tomorrow and kill us all!” The second of the three fishes agreed. “You are right”, he said. “We must leave the pond.” But the ____6___ fish laughed. “You are worrying without reason”, he said. “We have lived in this pond all our lives, and no fisherman has ever come here. Why should these men return? I am not going ___7____ - my luck will keep me safe.” The eldest of the fishes left the pond that ___8____ evening with his entire family. The second fish saw the fishermen ____9___ in the distance early next morning and left the pond at once with all his family. The third fish refused to leave even then. The fishermen ____10___and caught all the fish left in the pond. The third fish's luck did not help him - he too was caught and killed. (232字) a. A.fishersman B.fisherman C.fishermans D.fishermen 学生答案: D; 标准答 案: D b. A.excitedly B.excited C.excite
1. People have been talking about health for a long time because people know the importance of it. People's understanding of health also becomes deeper with the progress in scientific research. Recently the term "health" has come to have a wider meaning than it used to. It no longer means just the absence of illness. Today, health means the well-being of your body, your mind and your relationship with other people. This new concept of health is closely related to another term----quality of life. Quality of life is the degree of overall satisfaction that a person gets from life. Why has the emphasis of health shifted from the absence of disease to a broader focus on the quality of a person's life？One reason for this has to do with the length and conditions of life that people can now expect. Medical advances have made it possible for people today to live longer, healthier lives. Imagine for a moment that you were born in the year 1900. You could have expected on average to live until about the age of 47. In contrast, if you were born in the year 1999, you could expect to live to the age of 75. 2. 1. ______leads to people's deeper understanding of health. 2. https://www.doczj.com/doc/086957785.html,mon knowledge 2.Progress in scientific research 3.Better conditions of living 4.Quality of life 3. According to the passage, to people of today, health means______. 4. 1.absence of illness 2. a long life 3.good conditions of living 4.overall satisfaction with life
北京邮电大学实习报告
附：实习总结及心得体会： 课程回顾： 1、电声演播数字电视 这是第一个实验，历时一天半。此实验主要围绕H.264标准进行。 老师介绍了电声演播及数字电视技术的历史与发展，本实验室的历史与发展。然后介绍了各种声学图像方面的老设备以及发展状况，包括留声机、录像机和老式的播放电影带的放映机，到当今的2.0、5.1音响，PL，VCD，DVD等设备。讲解了图像编解码方面的各种知识。 *H.264-SVC的全称为可伸缩视频变换编码，以提高压缩视频流在丢包信道下传输时的错差恢复能力。根据具有不同空间层和时间级的主图像在编码结构中的重要性的不同来优化冗余图像码率的分配。在有效的控制冗余速率的同时，解决了在丢包信道传输视频时的误差漂移问题。该方法使用简单的粗糙量化主图像的方法来生成冗余图像，大大减小了差错恢复工具对编解码复杂度的增加。仿真结果表明，使用优化后的冗余图像能够在有限增加带宽的情况下有效抵制丢包信道下视频传输产生的误差漂移现象，使解码视频质量有明显改善。H.264-SVC采用分层技术，分为基本层和增强层。 实验中，老师改变编解码器不同参数，入帧间隔、编码比特率、编码帧率等，观察视频质量效果的变化，并分析原因。改变量化参数QP，通过观察，可知QP值越小，编码后文件大小越小，图像效果越差。通过改变码率进行流提取，发现视频子层数减少，画面播放速率加快。丢包率的测试中，丢包率越小画面越清晰，但相同丢包率时，有记忆的丢包模式比无记忆丢包模式解码产生的画面更清晰。 声学实验中，实验室放着各种设备，其中一套5.1声道环绕立体声音响放在实验室四周。我们坐在中间，听老师播放出来的不同性质的声音，让我们体会不同因素对声音效果的影响。在欣赏音乐的同时了解了一些原理。 最后一部分是用声压计测声强，见附加的实验报告。 2、天线射频讲课及实验 这个实验很遗憾没有看到各式各样的天线，但是听了老师对专业的介绍剖析，并且给我们分析了就业出国和考研的利弊，受益匪浅。老师反复跟我们强调大三是要做好人生规划的时候，要面临很多选择，并且用自己的一些经历给我们提出了一些建议和指导。 3、图像实验讲课 通过研究生学长的讲解，我们先了解了关于数字图像的一些基本知识，认识了图像编解码系统的基本构成。之后观察了同一节目在两台电视屏幕上的效果，调节其中一个的各个参数，观察图像效果的变化，比较不同条件对图像的影响。还用编解码器观察了压缩后图像的失真情况。 4、微波实验讲课及实验
一、阅读理解（共1道小题，共50.0分） 1.Robert Bruce was a famous Scottish general. In the early 14th century he tried to drive the English out of Scotland, but he was not successful because the English were too strong. Finally, Bruce had to run away and hide in a cave. One day, he lay in his cave thinking of the sad state of Scotland. A spider began to make a web above his head. Simply to pass the time, Bruce broke the web. Immediately the spider began to make a new one. Six times Bruce broke the web and six times the spider immediately made a new one. Bruce was surprised at this. He told himself that he would break the web a 7th time. If the spider made a new one, it would be a good lesson to him, for like the spider, he had been defeated six times. Bruce then broke the web. Again the spider made a new one. From this simple fact, Bruce became encouraged. He again got an army together. This time he was successful and drove the English out of Scotland. 1. Who was Robert Bruce? A. He was an English general. B. He was a Scottish general. C. He was a spider researcher D. He was a biologist from Scotland. 2. Why did Bruce hide in a cave? A. Because he was defeated by the English. B. Because he was afraid of the English army. C. Because he was looking for spiders D. Because he was badly injured in the battle. 3. In the beginning he broke the spider web just because______.
北京邮电大学历史沿革及历任校（院） 长简介 北京邮电大学简单介绍 北京邮电大学简称北邮（BUPT）位于北京市西土城路10号。是教育部直属、工业和信息化部共建、是我国信息科技人才的重要培养基地，是一所以信息科技为特色，工学门类为主体，工管文理相结合的多科性大学，是中国信息科技人才的重要培养基地，被誉为"信息通信的黄埔军校"。 北京邮电大学历史沿革 北京邮电大学创建于1955年，原名北京邮电学院，是以天津大学电讯系、电话电报通讯和无线电通信广播两个专业及重庆大学电机系电话电报通讯专业为基础组建的， 1993年经原国家教委批准，"北京邮电学院"更名为"北京邮电大学"。是中华人民共和国第一所邮电高等学府。原隶属邮电部，2000年全国院校调整后，直属教育部管理。 北京邮电大学设置极其所有专业 北京邮电大学设有信息与通信工程学院；计算机学院；经济管理学院；自动化学院；电子工程学院；人文学院；理学院；软件学院；国
际学院；民族教育学院；继续教育学院；网络学院等院。详细专业请登录官方网站或百度百科查询。 现任北京邮电大学校（院）长：方滨兴。国际代码（毕业证编号）:10013 北京邮电大学历任校（院）长： 钟夫翔（1955年至1956年任北京邮电学院院长）；孟贵民（1957年至1981年任北京邮电学院院长）；叶培大（1981年至1985年任北京邮电学院院长）；胡健栋（1985年至1989年任北京邮电学院院长）；朱祥华（1989年至1998年任北京邮电大学校长）；林金桐（1998年至2007年任北京邮电大学校长）；方滨兴（2007年至今任北京邮电大学校长） 本文来自：https://www.doczj.com/doc/086957785.html,/beijing/yangb/bjyddx.html 由https://www.doczj.com/doc/086957785.html, https://www.doczj.com/doc/086957785.html, https://www.doczj.com/doc/086957785.html, https://www.doczj.com/doc/086957785.html, https://www.doczj.com/doc/086957785.html,整理上传
北邮大学英语2答案 【精选】
一、完形填空（共1道小题，共50.0分） 1.(错误) I first saw the baby panda when she was only 10 days old. She looked like a white mouse. We ____1___her Xi Wang. It means “hope”. When Xi Wang was born, she weighed____2___100 grams. Xi Wang drank her mothe r’s milk for as much as 14 hours a day. When she was six months old, she started to eat bamboo shoots (嫩芽) and ____3____. Eight months later, she was not a small baby any more. She grew into a____4___young panda and weighed 35 kilos. When Xi Wang was 20 months old, she had to look after herself _____5___ her mother had another baby. ____6_____, it is very difficult for pandas to live in the wild. Here are some of the _____7____that pandas like Xi Wang may have in the future. If hunters catch a panda, they will kill it for its fur. If farmers____8____trees and forests, pandas will have no place to live in. When mothers leave baby pandas alone, people will often take them away. People think that the baby pandas need ____9_____. If pandas are in danger, we should try our best to protect them. If we do____10_____, soon there will be no more pandas in the world!?? a. A.made B.called C.told D.kept 学生答案: B; 标准答 案: B b. A.quite
北邮网络学院移动通信试题
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北京邮电大学网络教育学院 《移动通信原理及其应用》综合练习题(第六次修订) 一、选择题 1．GSM系统采用的多址方式为（） （A）FDMA （B）CDMA （C）TDMA （D）FDMA/TDMA 2．下面哪个是数字移动通信网的优点（） （A）频率利用率低（B）不能与ISDN兼容 （C）抗干扰能力强（D）话音质量差 3．GSM系统的开放接口是指（） （A）NSS与NMS间的接口（B）BTS与BSC间的接口 （C）MS与BSS的接口（D）BSS与NMS间的接口 4．N-CDMA系统采用以下哪种语音编码方式（） （A）CELP （B）QCELP （C）VSELP （D）RPE-LTP 5．为了提高容量，增强抗干扰能力，在GSM系统中引入的扩频技术（）（A）跳频（B）跳时（C）直接序列（D）脉冲线性调频 6．位置更新过程是由下列谁发起的（） （A）移动交换中心（MSC）（B）拜访寄存器（VLR） （C）移动台（MS）（D）基站收发信台（BTS）7．MSISDN的结构为（） （A）MCC+NDC+SN （B）CC+NDC+MSIN （C）CC+NDC+SN （D）MCC+MNC+SN 8．LA是（） （A）一个BSC所控制的区域（B）一个BTS所覆盖的区域 （C）等于一个小区（D）由网络规划所划定的区域 9．GSM系统的开放接口是指（） （B）NSS与NMS间的接口（B）BTS与BSC间的接口 （C）MS与BSS的接口（D）BSS与NMS间的接口 10．如果小区半径r＝15km，同频复用距离D＝60km，用面状服务区 组网时，可用的单位无线区群的小区最少个数为。（）
、完形填空（共1道小题，共50.0分） 1. Many students find the experience of attending university lectures to be a confusing and frustrating experience. The lecturer speaks for one or two hours, perhaps 1 the talk with slides, writing up important information on the blackboard, 2 reading material and giving out assignment. The new student sees the other students continuously writing on notebooks and 3 what to write. Very often the student leaves the lecture with notes which do not catch the main points and 4 become hard even for the students to understand. Most institutions provide courses which assist new students to develop the skills they need to be 5 listeners and note-takers. If these are unavailable, there are many useful study-skills guides which 6 learners to practice these skills independently. In all cases it is important to 7 the problem before actually starting your studies. It is important to acknowledge that most students have difficulty 8 acquiring the language skills required in college study. One way of 9 these difficulties is to attend the language and study-skills classes which most institutions provide throughout the academic year. Another basic strategy is to find a study partner 10 it is possible to identify difficulties, exchange ideas and provide support. a. A. illustrating B. which C. wonders D. effective E. distributing 学生答人标准答A A; … A; 案：’案：’ b. A. illustrating B. which C. wonders D. effective E. distributing 学生答匚标准答匚 案：巳案：巳
A . anyone else B . anything C . some of the things D . anything else A . more larger, all B . much larger, that C . very larger, both D . larger, those
A . flooded B . were flooded C . was flooded D . flood √4. A . being B . C . having D . having A . happened to see B . was happened to see C . happened to be seen D . was happened to be seen
A . rather B . enough C . quite a D . fairly A . the much best B . much the most best C . the very best D . very the best A . will put off
B . will be put off C . will be put D . has put off A . When B . What time C . How often D . How long A . take good care of B . has taken good care of C . took good care of D . are taken good care of
北京邮电大学通信工程专业本科生培养方案 一、培养目标 本专业培养具备通信技术、通信系统和通信网等方面的知识，能在通信领域中从事研究、设计、制造、运营及在国民经济各部门和国防工业中从事开发、应用通信技术与设备的高级工 程技术人才。 二、培养基本规格要求本专业学生主要学习通信系统和通信网方面的基础理论、组成原理和设计方法，受到通信工程实践的基本训练，具备从事现代通信系统和网络的设计、开发、调测和工程应用的基本能力。 毕业生应获得以下几方面的知识和能力： 1.掌握通信领域内的基本理论和基本知识； 2.掌握光波、无线、多媒体等通信技术； 3.掌握通信系统和通信网的分析与设计方法； 4.具有设计、开发、调测、应用通信系统和通信网的基本能力； 5.了解通信系统和通信网建设的基本方针、政策和法规； 6.了解通信技术的最新进展与发展动态； 7.掌握文献检索、资料查询的基本方法，具有一定的科学研究和实际工作能力。 三、主要课程 电路理论与应用的系列课程、计算机技术系列课程、信号与系统、单片机原理及应用、数字信号处理、通信原理、通信电子电路、无线通信方向系列课程、光通信方向系列课程、多媒体通信方向系列课程等。 四、学位课程信号与系统、通信原理、通信电子电路。 五、毕业最低学分及要求 毕业最低学分160 学分，其中必修（含公共基础平台、学科基础平台、专业基础平台）学分为102。学生从无线通信、光通信、多媒体通信三个模块方向中选一个方向主修，获得这个模块专业课程11 学分，并完成专业实习、毕业实习和毕业设计共25 学分。每个毕业生要修满22 学分的任意选修学分，包括文化素质类课程 6 学分（其中“两课”延伸课程2 学分）、 专业选修课12 学分、公共选修课4 学分。 六、学制四年。 七、授予学位及要求工学学士学位。 学生必须满足宁波大学学士学位授予的相关条例。 八、各类课程设置及学分分配汇总表 课程分类必修课选修课合计其中：实验、实习、实训、上机 公共基础平台课学科基础平台课专业基础平台课小计专业方向模块课任意选修课小计公共基础平台课学科基础平台课专业基础平台课专业方向模块课小计
北邮网络教育学院通信新技术阶段作业答案一、多项选择题（共15道小题，共45.0分） 1 CWDM 的特点主要有 1信道间隔较小 1实现容易，适用长距离的广域网 1功耗低 1体积小 1波间干扰小，安全可靠 知识 点: 综合练习题 学生答 案: [C;D;E;] 标准答 案: C;D;E; 得分: [3] 试题分 值: 3.0 提示: NGN的承载层 1主要功能是智能控制技术
1主要功能是媒体传输交换 1可以采用IPv6构建的全IP网络 1可以采用IPoA(MPLS)/ATM/IPoverSDH/IPoverWDM/裸纤等技术知识 点: 综合练习题 学生答 案: [B;C;D;] 标准答 案: B;C;D; 得分: [3] 试题分 值: 3.0 提示: 3GPP主要负责 1制定基于GSM /GPRS核心网、全IP核心网,WCDMA等的技术规范 1制定基于ANSI-41核心网、全IP核心网，cdma2000的技术规范 1负责研究无线频谱、技术、业务 1负责推动Internet标准规范制定 知识 点: 综合练习题 学生答 案: [A;] 标准答 案: A; 得分: [3] 试题分3.0
值: 提示: 下述哪几种技术背景是直接推进三网融合的进程：1数字技术的发展 1光通信技术的发展 1软件技术的进步 1统一的TCP/IP协议的广泛应用 1集成电路技术的发展 知识 点: 综合练习题 学生答 案: [A;B;C;D;] 标准答 案: A;B;C;D; 得分: [3] 试题分 值: 3.0 提示: 电信转型的驱动来自于 1电信运营商的激烈竞争 1终端客户需求的变化 1技术的提供者
北邮网络学院工商管理英语练习题答案 一、阅读理解（共1道小题，共25.0分） 1 (错误)People are so busy these days that many have no time to cook. This is a problem because many families love home cooking! A family meal brings everyone together. In some families, meals are often the only time everyone sees each other at the same time. Another reason people enjoy home cooking is that it is often a way of showing love. A parent who makes some cookies is not just satisfying a child's sweet tooth. She or he is sending a message. The message says, "I care about you enough to spend an hour making cookies that you will eat up in 15 minutes if I let you." There is also something about the smell of home cooking. The smell of home cooking pleases people of all ages. It makes most of us feel good and loved --- even if we are the ones doing the cooking! Next time you smell a cake being cooked, stop for a moment and pay attention to your mood（心情）. 1. Why do few people cook now? 1They have no time. 1They can buy food. 1Many people don’t like cooking. 1They d on’t like family meals. A parent spends an hour making cookies____. 1just to satisfy her or his child’s sweet tooth 1only to send a message 1to let a child eat up in 15 minutes 1often to show her or his love The writer thinks the smell of home cooking _____. 1makes us happy 1makes us be interested in cooking 1makes us pay attention to our mood 1makes us love others What’s the main idea of this passage? 1Family meals are important. 1How to make cookies. 1People are too busy to cook 1Homemade cookies taste better. Which of the following statements is NOT true according to the passage? 1There are quite a few reasons that people love home cooking. 1It becomes a problem that most families love home cooking. 1The smell of home cooking makes most of us feel good. 1 A family meal can bring the family members together. 试题分值：25.0 得分：[5, 5, 0, 5, 0] 提示：[1]A.细节题。本题问“为何现在没有多少人愿意下厨了?”中心词是“few people cook”。
信息与通信工程学院 通信工程专业实习报告 班级： 姓名： 学号： 实习地点：大唐电信 日期：2013年7月1-5日
一.课程安排
集团 讲师 325 13:30-15 :30防静电的重要性 大唐 电信 集团 讲师 大唐电信 集团主楼三层 325 15:30-17 :30SMT基础知识 大唐 电信 集团 讲师 大唐电信 集团主楼三层 325 7月5日 9:00-11: 30 SMT生产线参观 大 唐电 信 集团 讲师 仪表所 （通州） 13:30-17 :00 手工焊接实操 大 唐电 信 集团 讲师 仪表所 （通州） 二.实习回顾 7月1日 上午： 由大唐电信的赵健老师为我们介绍ICT行业动态。ICT是信息、通信和技术三个英文单词的词头组合(Information Communication Technology，简称ICT) 。它是信息技术与通信技术相融合而形成的一个新的概念和新的技术领域。老师主要介绍了ICT发展的现状和发展趋势。 ICT不同于传统通信概念，它的字面意思是信息通信技术。ICT产生的背景是行业间的融合以及对信息社会的强烈诉求。ICT作为信息通信技术的全面表述更能准确地反映支撑信息社会发展的通信方式，同时也反映了电信在信息时代自身职能和使命的演进。对于移动通信来说，ICT发展转向高速、宽带的数据通信为主，如由2G过渡到3G、4G时代；对于网络，更注重移动化与泛在性，从网络
共享到资源共享；对于终端来讲，更注重终端的智能化与多样性。 虽然电信业尤其是运营商的人员趋近饱和，但老师讲到，今年和明年是入行4G的好时机。今年，中国移动投资大量资金进行4G网络的建设，扩大4G的覆盖范围，势必需要吸纳许多通信人才。大家此时入行，应该有很好的发展机会，这就给我们提供了一个很好的择业选择。 下午： 仍由赵健老师为我们讲授3G网络架构及原理。 老师首先讲了3G各协议的标准与特点，着重介绍了由大唐主导提出的TD-SCDMA。老师将TD-SCDMA拆字讲解，便于我们理解。 TD：即TDD，时分双工，表明系统无需对称上下行频段，可灵活调整上下行时隙节点，便于提供非对称业务； S：即同步（synchronous），也可表示智能天线（smart antenna）； CDMA：包括了扩频调制和码分复用。 TD-SCDMA技术优势在于频谱利用率高、支持非对称业务、具有同径覆盖效应、呼吸效应不明显等特点，便于使用先进技术（如智能天线、联合检测等技术）。 TD-SCDMA网格结构及无线接口主要分为三层：物理层、数据链路层（包括MAC层、RLC层、BMC层、PDCP层）、网络层（包括RRC层等子层）。老师还介绍了TD-SCDMA信令流程、信道编码与复用（CRC校验、交织、速率匹配、扩频与调制）、随机接入、MOC流程、接力交换技术等内容。 最后，老师还简要地介绍了LTE的内容。LTE系统引入了OFDM和多天线MIMO、干扰协调等关键技术，显著增加了频谱效率和数据传输速率，支持多种带宽分配，频谱分配更加灵活，系统容量和覆盖显著提升。LTE无线网络架构更加扁平化，减小了系统时延，降低了建网成本和维护成本。 4G目前有两种技术标准，FDD-LTE和TD-LTE。前者已成为当前世界上采用的国家及地区最广泛的，终端种类最丰富的一种4G标准，后者主要由大唐电信提出，是TD-SCDMA标准的演进。 通过今天的课程，我对ICT、移动通信有了更多的了解。虽然仅仅经过一天的学习，不可能对于这些通信协议和技术完全掌握，对于一些行业术语还不是很懂（如呼吸效应），但也算开了一个好头，为接下来几天的学习打好了基础。 7月2日 今天是大唐电信集团杨毅刚副总裁为我们讲课，所以很兴奋很期待，很早便去了大唐等待老师的到来。杨老师今天主讲“产品开发、制造全流程的职业胜任