【正文】 t. Baumgartner still will free fall at a speed that would cause you and me to pass out, and no parachute is guaranteed to work higher than 25,000 feet (7,620 meters). cause there 。ll be traveling fast, so despite the distance, it will not be like diving into the deep end of a pool. It will be like he is diving into the shallow end. Skydiver preps for the big jump When he jumps, he is expected to reach the speed of sound 690 mph (1,110 kph) in less than 40 seconds. Like hitting the top of the water, he will begin to slow as he approaches the more dense air closer to Earth. But this will not be enough to stop him pletely. If he goes too fast or spins out of control, he has a stabilization parachute that can be deployed to slow him down. His team hopes it39。突然想到那件藍(lán)格子襯衫；那些被折成各種各樣形狀的信紙；那段從街角深巷伊始的友誼；還有那場(chǎng)還沒有開始就宣告了終結(jié)的邂逅計(jì)劃 …… 那些年那些天的非做不可，終于和青春一樣，都將在我們的人生中謝幕。 Have declared the end of the encounter that haven39。 Those were broken into various shapes of stationery。那些曾經(jīng)所謂的非做不可，只是青蔥年華里自己給自己注射的一支強(qiáng)心劑，或者說，是自以為是的精神寄托罷了。也曾經(jīng)好像已經(jīng)下定了決心去做某件事，但更多的時(shí)候是最后又打起了退堂鼓。s time, your ideas are always special to clear. Want, want, line is clear, as if nothing could shake his. Also once seemed to be determined to do something, but more often is he backed out at last. Dislike his cowardice, finally found that there are a lot of love, there are a lot of miss, like shadow really have been doomed. Those who do, just green years oneself give oneself an arm injection, or is a selfrighteous spiritual. 一個(gè)人的時(shí)候，自己的想法總是特別地清晰。 Originally, this world, can produce a chemical reaction to an event, in addition to resolutely, have to do, and time. 原來，這個(gè)世界上，對(duì)某個(gè)事件能產(chǎn)生化學(xué)反應(yīng)的，除了非做不可的堅(jiān)決，還有，時(shí)間。t want to give vent to out your inner voice can be in the high school children of the feelings in a period, but was eventually infarction when graduation party in the throat, later again stood on the pitch he has sweat profusely, looked at his thrown a basketball hoops, suddenly found himself has already can39。t really grow up, it seems is not so important。 The end of our life, and can meet many things really do? 而窮盡我們的一生，又能遇到多少事情是真正地非做不可？ During my childhood, think lucky money and new clothes are necessary for New Year, but as the advance of the age, will be more and more found that those things are optional?？傆X得自己自己似乎應(yīng)該去做點(diǎn)什么，或者寫點(diǎn)什么。 May be back in the past, to oneself the paranoid weird belief disillusionment, these days, my mind has been very messy, in my mind constantly. Always feel oneself should go to do something, or write something. Twenty years of life trajectory deeply shallow, suddenly feel something, do it. 一字開頭的年齡已經(jīng)到了尾聲。s actions. CSKA said they were surprised and disappointed by Toure39。s 21 win. Michel Platini, president of European football39。s Premier League match at Chelsea on Sunday. I am going to be at the match tomorrow and I have asked to meet Yaya Toure, he told BBC Sport. For me it39。s antiracism taskforce, is in London for the Football Association39。t charge you more than 35% of your pensation if you win the case. If you are thinking about signing up for a damagesbased agreement, you should make sure you39。t agree with the disciplinary action your employer has taken against you ? your employer dismisses you and you think that you have been dismissed unfairly. For more information about dismissal and unfair dismissal, see Dismissal. You can make a claim to an employment tribunal, even if you haven39。 在此對(duì)導(dǎo)師和所有 602 教研室的教員以及隊(duì)黨支部的關(guān)懷和幫助表示最誠摯感謝。還有，在設(shè)計(jì)過程中感謝井教員給我提供微機(jī)等便利的條件，使得我們能夠順利的完成畢業(yè)設(shè)計(jì)。我真誠感謝這期間李教員給予我們的全力幫助，細(xì)心指導(dǎo)以及對(duì)我們的嚴(yán)格要求，是她在我們遇到問題時(shí)，不辭辛苦幫我們解決 ,感謝她在設(shè)計(jì)和任務(wù)安排上長時(shí)間的指導(dǎo)。 致謝 至此，畢業(yè)設(shè)計(jì)已接近尾聲。到問題，自己實(shí)在解決不了的，可以和同學(xué)一起商量，共 同去解決它。設(shè)計(jì)不僅是對(duì)所學(xué)理論知識(shí)的考核，更是對(duì)把所學(xué)習(xí)理論知識(shí)運(yùn)用的實(shí)踐操作中的一次檢驗(yàn)。這樣就提高了我們的獨(dú)立思考和動(dòng)手實(shí)踐能力，這對(duì)我們以后不管是進(jìn)入社會(huì)工作還是繼續(xù)學(xué)習(xí)深造都有極其重要的幫助。 （ 2）遇到困難，迎難而上。拿到論題后，我和小組的成員首先去見了我們的指導(dǎo)老師，聽取了李教員給我們對(duì)該課題大概的講解的和一些重要建議，先找相關(guān)方面的資料和對(duì)該組成員進(jìn)行分工。從接到題目到設(shè)計(jì)結(jié)束的過程中經(jīng)歷了很多，總的來說可以概括為以下幾點(diǎn)。 2）經(jīng)過參數(shù)的設(shè)置后 就可以進(jìn)行系統(tǒng)的仿真， 2PSK 信號(hào)經(jīng)解調(diào)后各點(diǎn)的時(shí)間波形如圖 437 所示 圖 437 2PSK 信號(hào)經(jīng)相干解調(diào)后各點(diǎn)的時(shí)間波形 第五章 總結(jié) 我剛接到這個(gè)論文題目時(shí)，首先感覺這個(gè)題目很親切，因?yàn)槲覀兊膶I(yè)和它很接近，調(diào)制和解調(diào)的仿真也正是我所感興趣的，還有在此次設(shè)計(jì)過程中彼此的分工，相互協(xié)作的團(tuán)隊(duì)精神也起到了很大的作用，在一定程度上決定了設(shè)計(jì)的成敗。的相位模糊，所以 2PSK 信號(hào)的相干解調(diào)存在隨機(jī)的 倒π 現(xiàn)象，從而使得 2PSK 方式在實(shí)際中很少采用。這種現(xiàn)象通常稱為倒π 現(xiàn)象。在相干解調(diào)過程中需要用到與接收的 2PSK 信號(hào)同頻同相的相干載波，當(dāng)恢復(fù)的相干載波產(chǎn)生 180176。 圖 434 脈沖信號(hào)的參數(shù)設(shè)置 脈沖信號(hào)是幅度為 2，周期為 1s,占空比為 50%的基于時(shí)間的信號(hào)。 3) 經(jīng)過以上參數(shù)的設(shè)置后就可以進(jìn)行系統(tǒng)的仿真，其各點(diǎn)的時(shí)間波形如圖 425所示 圖 425 2FSK 信號(hào)經(jīng)調(diào)制后各點(diǎn)的時(shí)間波形 由上圖可以看出經(jīng)過 f1 和 f2 兩個(gè)載波的調(diào)制， 2FSK 信號(hào)有明顯的頻率上的差別 4． 解調(diào)仿真 2FSK 的解調(diào)分為相干解調(diào)和非相干解調(diào)法，下面采用相干解調(diào)法對(duì) 2FSK 信號(hào)進(jìn)行解調(diào) 解調(diào)方框圖 如圖 426 所示 圖 426 2FSK 信號(hào)解調(diào)方框圖 其中 From File 是一個(gè)封裝模塊，就是 2FSK 信號(hào)的調(diào)制模塊，兩個(gè)帶通濾波器分別將 2FSK 信號(hào)上下分頻 f1 和 f2 ,后面就和 2ASK 信號(hào)的解調(diào)過程相同，各參數(shù)設(shè)置如下： 圖 427 2FSK 信號(hào) f1 帶通濾波器參數(shù)設(shè)置 圖 428 2FSK 信號(hào) f2 帶通濾波器參數(shù)設(shè)置 經(jīng)過以上參數(shù)的設(shè)置后就可以進(jìn)行系統(tǒng)的仿真， 2FSK 信號(hào)經(jīng)解調(diào)后各點(diǎn)的時(shí)間波形如圖 429 所示 圖 429 2FSK 信號(hào)經(jīng)相干解調(diào)后各點(diǎn)的時(shí)間波形 經(jīng)過系統(tǒng)的仿真可以觀察出系統(tǒng)的誤碼率為 ，如下圖所示 4． 3 2PSK 的調(diào)制與解調(diào)仿真 1 2PSK 調(diào)制仿真 1） 建立模型方框圖 2PSK 信號(hào)調(diào)制的 Simulink 模型方框圖如圖圖 431 所示 圖 431 2PSK 信號(hào)調(diào)制的 Simulink 的模型圖 其中 Sine wave 和 Sine wave1 是反相的載波，正弦脈沖作為信號(hào)源。 f2 的參數(shù)設(shè)置為圖 423 所示 圖