【正文】 字表述。首先，我要鄭重地感謝我的導師——王維芳。自我因個人興趣而選擇本設(shè)計主題開始，王老師便給予充分的理解和支持，就論文的立意選材、謀篇布局做了必不可少的指導，王老師對學術(shù)的敏銳以及思路的開闊為本文的順利完成提供了富有成效的保證。即便是我到中國石油慶陽石化去參加實習，但她仍然多次通過電話和督促、指導畢業(yè)設(shè)計的寫作，其嚴謹和負責，讓一度偷懶懈怠的我倍為感動，也深感慚愧?！皫熣撸瑐鞯朗跇I(yè)解惑也?！睆耐趵蠋熒砩?，我深刻地領(lǐng)略到這句話的精彩內(nèi)涵。在過去三年多的學習和生活中，尤其是當我遇到挫折、陷入迷?；蛘咦鲥e事時，王老師總是以師者的智慧、長輩的寬容、朋友的坦誠，給我難能可貴的指點和幫助。為遇到這樣的老師而感到慶幸。其次，要感謝在實習單位我的知道老師趙斌老師和我的同門師兄妹：劉新樂、王剛、潘松偉、翟小軍，尤其是趙斌對設(shè)計修改提出了可貴的建議；還要感謝我的室友、同學，感謝計算機與通信學院通信工程系的所有老師，他們使我的大學生活變得豐富、充實。最后，我必須要感謝我的家人。“吾本寒家”，感謝我的父母含辛茹苦、無怨無悔地把我撫養(yǎng)、栽培到現(xiàn)在，多年來對我無私的支持、關(guān)愛與呵護。家人永遠是我的依托，也是鞭策我不斷前進的力量。有人說，時間如流水，一刻不停地沖刷著記憶，但是，有些記憶隨著時間的沖刷不會消逝，反而會變得越來越清晰、越來越值得回味，因為它們已深深銘刻在內(nèi)心深處。兩年多的財大求學即將劃上句號，收拾行囊、開始新征途的日子悄然逼近，回頭看看走過的路，無限感慨，揮揮手，卻依然不想說再見！參考文獻［1］張葉榮，蜂窩移動通信網(wǎng)絡(luò)規(guī)劃與優(yōu)化[M]。北京：電子工業(yè)出版社，1995［2］蔣同澤，現(xiàn)代移動通信系統(tǒng)[M]。北京：電子工業(yè)出版社，1996［3］周月臣，移動通信工程設(shè)計[M]。北京：人民郵電出版社，1996［4］張傳福，TDSCDMA通信網(wǎng)絡(luò)規(guī)劃與優(yōu)化[M]。北京：人民郵電出版社，2009［5］啜鋼等著，CDMA無線網(wǎng)絡(luò)規(guī)劃與優(yōu)化[M]。北京：機械工業(yè)出版社，2004［6］唐賢遠 李興著，數(shù)字微波通信系統(tǒng)[M]。北京：電子工業(yè)出版社，2004［7］李建東 郭梯云 鄔國楊，移動通信[M]。西安：西安電子科技大學出版社［8］中國石油慶陽石化公司無線通信技術(shù)方案[M]。［9］Honeywell Laboratories,Wireless and Sensing Solutions Advancing Industrial Efficiency[J]. MN［10］ (中國通信網(wǎng))附件一 設(shè)計外文文獻翻譯1 外文資料Key Features of TDSCDMA PhonesAmong all consumer electronic devices ever invented, cellular telephones (cell phones for short) have been the most popular in terms of the number of devices sold as a function of time. Today, cell phones are almost as mon as the wired telephone. In certain European countries, they exceed the total number of wired telephones, and in several Scandinavian countries, cell phones have bee a way of life.The concept behind the working of a cell phone is based on what is known as frequency reuse. There is only so much of available electromagnetic spectrum, or frequency band, available for transmitting a voice call with a cell phone and this has to be shared by many users. Each voice conversation requires a certain amount of bandwidth , which is a chunk of the available frequency band. In order to support the large number of subscribers, the service providers split the frequency band into smaller subbands and spread them over a given area. They install radio transmitters, called base stations, that serve an area called a cell. Each cell utilizes a subband of the spectrum. Two cells that are sufficiently far apart can use the same subbands because radio signals lose their strength with distance and do not interfere. Thus, frequency subbands are spatially reused by the creation of several cells supported by base stations. The name cellular telephony es from this architecture.Each base station is connected to a mobile switching center that handles cell phone calls and also performs a very important function called mobility management. If you make a phone call to a wired telephone, a telephone switch will know how to route your call because the telephone device is fixed. If you make a phone call to a cell phone, there must be a mechanism that keeps track of where the cell phone is and accordingly routes the call. This mechanism is called mobility management. It is performed by the mobile switching center, with the assistance of two databases called the home location register and the visitor location register.Every cell phone is registered with a home location register in its home calling area. When you make a call to a cell phone, the telephone switch contacts the mobile switching center associated with the home location register. The home location register contains information about the visitor location register with which the mobile phone is currently registered while roaming. From this point, the call is routed to the mobile switching center associated with the visitor location register and handled from there. As the person with the cell phone moves, the cell phone constantly updates its location with the visitor location register, which in turn updates the home location register upon a change in location.Another important aspect of managing mobility is what is known as the process of handoff. As users move with their cell phones, they cross the coverage of one base station and enter the coverage area of another—that is they cross cell boundaries. At this point, the cell phone should switch its connection from the old base station to the new base station. This procedure is called handoff and it involves measuring and paring the received signal strengths from multiple base stations.Within a cell, multiple users may simultaneously conduct phone conversations using the available frequency subband. They may do this in several different ways. The earliest technique was to further divide the subband into smaller chunks of frequency and use one chunk for one conversation. This is called frequency division multiplexing and was used in the analog cellular service first implemented in the early 1980s by ATamp。T. This was also adopted in Europe by several countries, each using its own standard. These systems were called the first generation cellular telephone systems. The frequency division multiplexing technique is inefficient and the resulting capacity to support subscribers is smaller than desired. historyIn the 1990s, there was a trend to move to digital standards to enhance the capacity of cellular systems. In Europe, all the countries agreed upon a mon digital standard called the global system for mobile munications (GSM). In the United States, two major standards emerged called the IS136 and IS95 standards. These are the secondgeneration cellular telephone systems.The GSM and IS136 standards are based on timedivision multiplexing where users appear to talk continuously, but their signals are transmitted one after another. That is, their signals are separated in time and these are monly called the TDMA (Time Division Multiple Access) standards. The IS95 standard employs codedivision multiplexing where the signals of all users are simultaneously transmitted using the same frequency band. Each user is assigned a unique code that is designed to enable e