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代写ps电子与通信 个人陈述案例 十四

浏览: 日期:2020-06-10

Statement of Purpose

  Applicant: xx   Program: Wireless Communication

  As a student of information engineering, the last semester of my undergraduate program at the University of xx marked an important period for me. While many of my fellow students had great difficulties in their job hunting, I was already recruited by xx Corporation, the largest institution of protocol analysis in China. This was an indication of the industry’s full recognition of my strong ability to apply acquired knowledge to practice, to solve practical problems, and the great potential of research and development as a top-notch communication engineer.

  Living up to the high expectations of the top management, I have proved myself a great asset to the corporation. Since the very outset of my employment, I have familiarized myself with the mobile application in the SS7 protocol, part of the UMTS protocol. I participated in the xx of the corporation’s SS7 Multi-slot Test Instrument, involving decoding, analyzing, emulation, optimization, and solution of SS7. My responsibility was the BSSAP in GSM, involving the analysis of A Interface Process, Drop Rate, Channel Congestion, CIC Seizure, Disconnection Cause, Handover, as well as the trace of IMSI. As the chief contact person, I collaborated with xx and provided solution to the wireless network optimization and evaluation by means of our corporation’s protocol decoding of A Interface and Abis Interface as well as GN Nettest’s GSM COMPASS software.

  In July, xx was to conduct a nationwide assessment of 3G equipment by all the domestic manufacturers and our corporation’s was responsible for the test of all the sample equipment. I was put in charge of testing Nortel’s content-based fee-counting performance of the GGSN system in the xx Center of xx. My testing covered the number of contexts based on the maximum parallel PDP, the maximum PDP response rate, the average time delay in PDP response, the average time delay in data processing, the maximum data handling capacity. The statistics from my analysis helped Nortel engineers gain a clearer picture of the performance of their GGSN equipment.

  My greatest professional achievement came in this September when our corporation dispatched me to xx to work out the call failure problem in the network equipment imported by Bombay VSNL operators from China xx Corporation, China’s largest network equipment supplier for whom our corporation has been providing network optimization solutions. The failure to solve the problem would lead to serious damages of xx’s business reputation in the international market. Together with xx engineers, I made detailed decoding analysis of A Interface and found that an erroneous signaling has been caused in the Information Transfer Capability by the xx manufacturer. As the manufacturer used the a6 and 26 reserved in the standards which failed to conform to the value of 60 (indicating speech), the calls could not be recognized by the MSC system. A patch from xx headquarters easily solved the entire problem and more than 30 xx and xx engineers witnessed how a young network engineer solved a problem that nobody could solve for such a long time. Following this, I flew to xx together with xx engineers where we offered technical training to local MTNL operators on SS7, including TUP, ISUP, INAP, MAP, CAP, and BSSAP. Apart from enhancing my ability to solve challenging problems independently, I improved my ability to use English as a working language.

  I am equally proud of my other professional highlights. My in-depth understanding of mobile network qualified me as a technical inspector of the GSM network of the entire xx Province during which I proposed that the call failure rate be calculated by either “Assignment Complete” + “Clear Request” or “Handover Complete” + “Clear Request”. My propositions, duly approved by many specialists, have now been incorporated as a technical standard by China Mobile in network inspection. Apart from that, I have done much technical exchange with xx China Headquarters where I attended high-ranking forums on WCDMA and also shared my experiences and concepts with experts there. In addition, as a delegate of our corporation, I have participated in two conferences held by xx (xx, one of the influential standards organizations in the world) and in several sub-conferences in the xx Group. Apart from keeping myself abreast with the latest communication standards in China and in the world, I also contributed to the perfection of some technical standards. At one of the discussions, the problem of the low BS efficiency was addressed. According to the A.S0013-Av1.0, the MSC pages the BS first and then sends SMS on the common channel or the traffic channel. Yet, when the BS does receive the paging request message, it can not distinguish whether or not to assign the traffic channel, leading to reduced BS efficiency. To change the problem, we proposed the addition of fields in the paging request message to unequivocally indicate that the MSC wants to deliver SMS either on common channel or traffic channel, thus enhancing the BS efficiency. Finally, early in 2005, I will be dispatched by my corporation to xx to undertake on-the-spot development based on the local Celcom operations.

  In retrospect, my achievement of so many distinguished professional results should be attributed primarily to the rewarding education I received from xx, arguably one of the most prestigious institutions in the fields of communication and information systems and in signal and signal processing in both China and the entire Asia. Majoring in information engineering, I have studied the subject with great interest and initiative. In attending the course Information Theory, Shannon, with his Shannon Theorem and Shannon Limit, immediately became my idol as he pictured the ultimate direction of communication technology. I have laid a solid theoretical knowledge base by learning a whole spectrum of specialized subjects. My academic performance showed steady and consistent rise over the years. By reading Digital Communications by John G. Proakis, I was exposed to a host of new technologies such as serial and parallel concatenated codes, punctured convolutional codes, turbo TCM and turbo equalization, and spatial multiplexing.

  Having mastered C language for programming design, VHDL for hardware design, and MATLAB for simulation, I undertook a design project on GSM TCH/FS Channel Coding in which I completed the whole channel coding for the full rate speech channel TCH/FS in the GSM system under the simulation platform of MATLAB 6.5. My more ambitious design happened in my graduation project Call Admission Control Scheme in Multi-Service CDMA Cellular Systems. My paper analyzed the relationship between the system residual capacity and QoS constraints for a multi-service CDMA cellular system and employed the SIR-measurement-based local and global call admission control schemes for multi-services. In my project, I constructed a model for the system and performed extensive simulation through MATLAB 6.5 and the board of examiners commented on my design as “showing a solid foundation in communication theories and skills, an in-depth understanding of 3G call access control (CAC), with original perspectives on some issues apart from demonstrating abilities in analyzing and solving practical problems.”

  Despite all my academic and professional buildup, I have faced major embarrassments. When offering 3G trainings, I was questioned by one client why TURBO, as the FFC code for high rate transmission, has the fastest transmission speed and what is the theoretical basis for this. I could not come up with an adequate answer with so many people present and they were very disappointed. This made me aware of the need to pursue more advanced education—an undergraduate education is simply far from sufficient in this rapidly changing world of communication technology!

  To become a truly well-trained communication specialist, I would like to seek a Master of Science Program in Wireless Systems at the Department of Signals, Sensors, and Systems, xx. Located in xx, xx, the country which has produced the world communication giant Ericsson, your Department is most strong in teaching and research at graduate levels. In addition, the xx Center is based in your reputed Department and the professors and lecturers responsible for the courses are all at the forefront of wireless systems development. In my proposed program, I would like to concentrate on any of the following three major fields—Wireless Communications, Information Transmission & Processing, and Networks & Services. I hope to interact fully with my prospective professors, lecturers, classmates from across the world and industrial leaders through coursework, seminars, workshops and internships in local industries. Your program will certainly catalyze on my past academic and professional background to cultivate me into a top-notch engineer in wireless communication.

  In my first overseas experience to India, I received my mother’s greetings immediately after getting off the plane at the airport and wireless communication connected us. It is hard to imagine the modern world without wireless communication. While enjoying the conveniences brought by wireless communications myself, as an professional of the communications industry, I am determined to exploit the limits in the existing wireless communication technology and make it better for perfect human interaction.



目的声明
 
申请人:XX项目:无线通讯
 
信息工程学院的学生,上学期我在XX大学的本科课程,标志着我的重要时期。虽然我的很多同学在求职有很大的困难,当时我已经招募XX公司,在中国最大的机构的协议分析。这是一个行业的充分肯定,我学到的知识应用于实践,解决实际问题的能力强,研究和发展的巨大潜力,作为一个一流的通信工程师的指示。
 
高层管理人员的高期望,我已经证明了自己是一个伟大的资产,该公司。自一开始就我的就业,我自己熟悉的SS7协议的移动设备应用程序中,UMTS协议的一部分。我参加了该公司的7号信令测试仪器多槽XX,涉及解码,分析,仿真,优化和解决方案的SS7。我的职责是在GSM的BSSAP,涉及接口过程的分析,掉落率,通道拥塞,CIC扣押,断线原因,交接,以及跟踪的IMSI。作为首席接触的人,我与XX,并提供了解决方案,通过我们公司的协议解码的A接口和Abis接口以及作为GN NETTEST的GSM COMPASS软件的无线网络优化和评估。
 
今年7月,XX是所有国内厂家和我们公司的负责测试所有样品设备进行全国范围内的3G设备评估。我是把负责测试北电的基于内容的收费XX XX中心的GGSN系统的计算性能。我的测试覆盖的最大并行PDP中,的最大PDP响应率,在PDP的响应延迟的平均时间,在数据处理中的延迟的平均时间,最大的数据处理能力的基础上的上下文的数目。从我的分析统计帮助北电的工程师们可以更清楚地了解他们的GGSN设备的性能。
 
我最大的专业成就来在今年9月时,我们公司派遣我到XX来工作了呼叫失败的问题在孟买VSNL运营商进口来自中国XX公司,中国最大的网络设备供应商的网络设备对他们来说,我们的法团已被提供网络优化的解决方案。未能解决的问题,会导致在国际市场xx的商业信誉造成严重损害。加上XX工程师,我做了详细的解码分析A接口,并发现一个错误的信号已经造成XX制造商在信息传输能力。作为制造商使用的a6和26保留在没有符合的值60(表示语音)的标准,不能被确认的呼叫由MSC系统。 XX总部的补丁很容易解决整个问题,超过30 XX和XX工程师亲眼目睹一个年轻的网络工程师是如何解决的问题,没有人能解决这么长的时间。在此之后,我立马一起XX的XX工程师提供技术培训,以当地MTNL运营商SS7,包括TUP,ISUP,INAP,MAP,CAP,BSSAP。除了提高我的能力,独立解决具有挑战性的问题,我提高我的能力,使用英语作为工作语言。
 
我同样感到自豪我的其他专业亮点。我深入了解移动网络的资格,我在这期间我建议不是“转让完成”+“清除请求”或“移交完成”呼叫失败率计算整个XX省的GSM网络作为技术总监+“清除请求”。我的主张,许多专家正式批准,现在已经被纳入技术标准由中国移动在网络检查。此外,我已经做了许多技术交流XX中国总部在那里我参加了WCDMA和高级论坛上也分享我的经验和理念与专家。此外,我们公司作为一个代表,我已参加XX(XX,一个在世界上有影响力的标准组织)和若干个子会议在XX集团举行两次会议。除了保持自己掌握最新的通讯标准在中国和世界,我也贡献了一些技术标准的完善。在一个讨论,这个问题解决的低BS效率的。据A.S0013-Av1.0的,MSC页面BS,然后再发送短信上的公共信道或业务信道。然而,当BS接收寻呼请求消息,它不能区分是否分配的业务信道,导致减少的BS效率。要改变它的问题,我们提出了另外的寻呼请求消息中的字段明确地表明了MSC要提供SMS上的公共信道或业务信道,从而提高了BS效率。最后,早在2005年,我将我公司派遣到xx进行现场开发基于本地西尔康操作。
 
现在回想起来,我的成就这么多杰出的专业效果应主要归因于有益的教育,我收到来自XX,可以说是一个在通信和信息系统等领域的信号和信号处理在这两个中国最负盛名的机构,整个亚洲。信息工程专业,我研究的课题,怀着极大的兴趣和主动性。在参加课程信息理论,香农,他的香农定理和香农极限,立刻就成了我的偶像,他描绘了通信技术的最终方向。我已经奠定了扎实的理论知识基础,学习专门学科的整体频谱。多年来,我的学习成绩呈稳定和持续上升。通过阅读由John G. Proakis的数字通信,我接触到了许多新技术,如串行和并行级联码,凿孔卷积码,中医涡轮增压和涡轮增压的均衡,和空间复用。
 
掌握C语言VHDL编程设计,硬件设计,MATLAB进行仿真,我承诺在GSM TCH / FS信道编码设计项目中,我完成了整个信道编码在GSM全速率语音信道TCH / FS MATLAB 6.5平台下的仿真系统。我更加雄心勃勃的设计发生在我的毕业设计呼叫准入控制计划在多业务CDMA蜂窝系统。我的分析系统的剩余容量和服务质量(QoS)约束的多业务CDMA蜂窝系统之间的关系,并雇用爵士 - 基于测量的局部和全局的呼叫接纳控制多服务计划。在我的项目,我构建了一个系统模型,并进行了大量的仿真通过MATLAB 6.5板考官评论“我的设计显示了坚实的基础通信的理论和技能,深入了解的3G呼叫接入控制( CAC),与原来的观点,在一些问题上,除了展示在分析和解决实际问题的能力。“
 
尽管我所有的学术和专业积累,我也面临着重大的尴尬。提供3G培训时,我提出了质疑一个客户为什么TURBO,作为FFC代码的为高速率传输,传输速度最快的理论基础是什么。我不能拿出足够的答案有这么多的人,他们很失望。这使我意识到需要追求更先进的教育,本科教育是根本远远不足以在这个瞬息万变的世界通信技术!
 
要成为一个真正的训练有素的通信专家,我想寻求在无线系统中的信号,传感器系统,XX部硕士班。坐落在XX,XX,全国已生产出世界通信业巨头爱立信,税务局是在研究生层次的教学和科研中最强大的。此外,XX中心是基于知名部,负责课程的教授和讲师的无线系统的发展都走在了前列。在我的方案,我想专注于以下三个主要领域 - 无线通信,信息传输与处理,网络与服务。我希望能充分互动与我未来的教授,讲师,同学们来自全国各地的世界工业领袖,通过课程,讲座,工作坊及本地工业实习。你的程序肯定会促进我过去的学术和专业背景,培养我成为一个顶尖的工程师在无线通信。
 
在我第一次到印度的海外经验,我接到我母亲的问候,立刻下车后,飞机在机场和无线通信连接我们。不具有无线通信,这是很难想象现代世界。在享受无线通信带来的便利自己,作为一个专业的通信行业,我决心利用在现有的无线通信技术的限制,使其更好地为完善的人机交互。