【正文】 MCS51 系列單片機(jī)的軟件，這從近年來(lái)各仿真機(jī)廠商紛紛宣布全面支持 Keil 即可看出。 Keil 提供了包括 C 編譯器、宏匯編、連接器、庫(kù)管理和一個(gè)功能強(qiáng)大的仿真調(diào)試器等在內(nèi)的完整開(kāi)發(fā)方案，通過(guò)一個(gè)集成開(kāi)發(fā)環(huán)境將這些部份組 合在29 一起。運(yùn)行 Keil 軟件需要 Pentium 或以上的 CPU， 16MB 或更多 RAM、 20M 以上空閑的硬盤(pán)空間、 WIN9 NT、 WIN202 WINXP 等操作系統(tǒng)。 所以本設(shè)計(jì)使用 C 語(yǔ)言編程。 30 結(jié) 論 本課題是在了解了當(dāng)前 GPS 導(dǎo)航系統(tǒng)的條件下，自行開(kāi)發(fā)一套 GPS 接收機(jī)。 GPS 接收機(jī)的開(kāi)發(fā)和研制，主要是了解 GPS 的原理，熟悉 GPS 接收機(jī)的工作原理及其各部分工作流程。 GPS 信號(hào)處理這一塊由 GR87 實(shí)現(xiàn)，通過(guò) GR87 與 MCS51 兼容系列單片機(jī)串口相連，配備了所需的外圍電路，同時(shí)配有液晶顯示器，可以顯示字 符，并詳細(xì)介紹了該 GPS 接收機(jī)的硬件和軟件設(shè)計(jì)。開(kāi)發(fā)的 GPS 接收機(jī)已經(jīng)可以正常工作，同時(shí)顯示的定位精度和定位速度等各方面的指標(biāo)都滿足要求。通過(guò)實(shí)驗(yàn)?zāi)M仿真，結(jié)合本課題的人機(jī)界面、參數(shù)設(shè)置與計(jì)算等，能夠滿足課題要求，可以實(shí)現(xiàn)導(dǎo)航功能。 通過(guò)本課題的完成，我對(duì) GPS 的原理有了深入的理解，熟練地掌握了 GPS 接收機(jī)的工作原理。同時(shí)，我對(duì)單片機(jī)的應(yīng)用有了更深入的掌握，提高了單片機(jī)外圍電路設(shè)計(jì)和軟件設(shè)計(jì)的經(jīng)驗(yàn)的能力。這些對(duì)我今后的工作的提高都有所幫助。 同時(shí)，由于水平有限和時(shí)間問(wèn)題，有許多不足。沒(méi)有進(jìn)行誤差分析，定位數(shù) 據(jù)可能有誤差，這有待改進(jìn)和提高。 31 謝 辭 在此，首先，我要感謝老師！老師學(xué)識(shí)淵博、治學(xué)嚴(yán)謹(jǐn)、耐心細(xì)致。在畢業(yè)設(shè)計(jì)期間，無(wú)論是在資料的查找、原理的講解，還是在做人處世的風(fēng)格上，都讓我受益匪淺，得到的啟示是難以詳盡。在這里我要向老師表示最忠心最誠(chéng)摯地感謝！我有很多基礎(chǔ)理論知識(shí)掌握不牢，一面幫我查缺補(bǔ)露，一面發(fā)揮我的特長(zhǎng)，讓我的課題能夠順利有序地進(jìn)行到滿足要求。 其次，我還要感謝我們課題組的 ***等同學(xué)，在共同的學(xué)習(xí)中，我們互幫互助，愉快地完成了畢業(yè)設(shè)計(jì)！ 此 外 ,還要感謝以前的代課老師 ,他們?cè)诟鞣矫娑冀o于了我不少幫助 ,愿他們工作愉快 ,身體健康 ! 最后，向在這三年期間幫助過(guò)、關(guān)心過(guò)我的老師和同學(xué)致以忠心地感謝！愿大家身體健康、工作愉快輕松、生活幸福安康！謝謝大家！ 32 參考文獻(xiàn) [1]劉基余 , 李征航等 . 全球定位系統(tǒng)原理及應(yīng)用 . 北京 : 測(cè)繪出版社 ,1993 [2]洪大永 . GPS 全球定位系統(tǒng)技術(shù)及應(yīng)用 . 福建 : 廈門(mén)大學(xué)出版社 ,1998 [3]張守信 . GPS 衛(wèi)星測(cè)量定位理論與應(yīng)用 . 長(zhǎng)沙 : 國(guó)防科技大學(xué)出版社 ,1996 [4]劉基余 . GPS 衛(wèi)星導(dǎo)航定位原理與方法 . 北京 : 北京科學(xué)出版社 ,2021 [5]李貴奇，吳延忠等 . 地球同步衛(wèi)星定位 . 北京 : 北京解放軍出版社， 1991 [6]王廣運(yùn)，陳增強(qiáng)等 . GPS 精密測(cè)地系統(tǒng)原理 . 北京 : 測(cè)繪出版社， 1989 [7]邱致和，王萬(wàn)義 . GPS 原理與應(yīng)用 . 北京 : 電子工業(yè)出版社， 2021 [8]李華 . MCS－ 51 系列單片機(jī)實(shí)用接口技術(shù) . 北京 : 北京航空航天大學(xué)， 1993 [9]何立民 . 單片機(jī)高級(jí)教程 . 北京： 北京航空航天大學(xué)出版社， 2021 [10]高鋒 . 單片微型計(jì)算機(jī) 原理與接口技術(shù) . 北京 : 科學(xué)出版社， 2021 [11]竇振中 . 單片機(jī)外圍器件實(shí)用手冊(cè) . 北京 : 北京航空航天大學(xué)出版社， 1998 [12]肖洪兵 . 跟我學(xué)用單片機(jī) . 北京 : 北京航空航天大學(xué)出版社 , [13]李廣第 . 單片機(jī)基礎(chǔ) . 北京 : 北京航空航天大學(xué)出版社， 1999 [14]徐惠民 ,安德寧 . 單片微型計(jì)算機(jī)原理接口與應(yīng)用 . 北京 : 北京郵電大學(xué)出版社， 1996 [15]GB90781996, 工業(yè)爐窯大氣污染物排放標(biāo)準(zhǔn) . [16]何立民 . 從 Cygnal 80C51F 看 8 位單片機(jī) 發(fā)展之路 . 單片機(jī)與嵌入式系統(tǒng)應(yīng)用， 2021 年，第 5 期 ,P5~8 [17]Wolf W, 孫玉芳等譯 . 嵌入式計(jì)算系統(tǒng)設(shè)計(jì)原理 . 北京 : 機(jī)械工業(yè)出版社 ,2021 [18]洪大永 . GPS 全球定位系統(tǒng)技術(shù)及應(yīng)用 . 廈門(mén)：廈門(mén)大學(xué)出版社， 1998 [19]李朝青 . 單片機(jī)原理及接口技術(shù) . 北京：北京航空航天大學(xué)出版社 , 2021 [20]劉瑞華 . MCS51 單片機(jī)與 GPSOEM 板的串行通信 . 電子通訊技術(shù)， 2021，（ 5）：9395 33 外文資料翻譯 obtains the w idespread applic ation, but it still had the insuffic ienc y. GPS has bec ome a global high and new tec hnology industry, which is one kind of information infrastructure and is entering people39。s daily life gradually. The existenc e insuffic ienc y is very obvious, it is the system which controls by military,and it is impossible at any time any place guarantee c ivil。 In the bustling streets, the jungle, or in the mask and the environment bad situation, its usability is restric ted。 The single system itself has the limitation,and it is impossible to guarantee any application. receives the attention,but it is actually disappointing. GLONASS once gave people the very optimistic scene, the reality is heartless bec ause of the economic al and the tec hnical dual reasons, which enable it only works inc ompletely, now only has the insuffic ienc y ten star work, and is very unstable. forestalls opponent by a show of strength, w ith GPS bination applic ation for overall mentality. The Galileo plan lifts up h igh the pure c ivil flag, feels relieved for the human w ith the security sense. Moreover its announce public ly and the GPS patible interaction, strengthened its attrac tion and the petitive pow er, as w ell as servic e guarantee pledge. The ric hly c olorful servic e may satisfy the different sc ale and the applic ation domain demand. multisystem c ombination is better and better, using the equipment is limd. Many years later, possibly has many satellite navigational system in the sky movement, is the better and better, one is not unnecessary。 second, c annot do too using the receiver plex, will otherw ise increase the cost largely, the being unable mass promotion。 third, will rec eive after the satellite number w ill achieve c ertain number, the satellite s ignal many (will not bring the obvious advantage again. Generally has the pair of system foot. enhanc ement system emerges one after another inc essantly, the final outlet is the multisystem39。s bination. Now various satellite navigation enhanc ement system emerges one after another incessantly, only says by the macrozonality enhanc ement system, has US39。s WAAS, Europe39。s EGNOS, China39。s CWAAS, Japan39。s QZSS (also has one kind is MSAS). Onc e has two c omplete whole world guidance system (GNSS) w ork, inorbit satellite reaches 5060, was not unnec essary to construct these macrozonalities to 34 strengthen is systematic. More is must walk both ec onomizes, and handles matters road of the international cooperation. The military and c ivilian dual purpose and public and private builds is the development trend which one kind is noteworthy. takes military GPS and GLONASS announc ed successively implements the military and c ivilian dual purpose policy. The military controls GPS and GLONASS announced successively implements the military and c ivilian dual purpose polic y, this acc identally, the satellite navigational system is one kind of very good information resource by no means that its c onstruction39。s goal lies in uses, only then w idely applies, c an manifest its value. Certainly, GPS opens c ivil is also between the Americ an Department of transportation and Department of Defense the longterm negotiations ac hievement, as soon as lets loose, really the effect is unusual, instead has helped military39。s busy, also causes the American national prestige to inspire greatly, and promoted the system tec hnology and the user receiver technology greatly, only will then have the GPS modernization. emphasizes its pure c ivil nature, in fact may also for military. W