調(diào)制解調(diào)技術(shù)中英文翻譯資料-wenkub
2023-01-22 01:37:41 本頁(yè)面
【正文】 QAM 在固定的點(diǎn)對(duì)點(diǎn)數(shù)字微波系統(tǒng)中應(yīng)用較廣泛，它具有很高的頻譜利用率。近年來由于放大器設(shè)計(jì)技術(shù)的進(jìn)展，實(shí)現(xiàn)了調(diào)制方法成為可能。市場(chǎng)是發(fā)展的驅(qū)動(dòng)力。我 們要積極促進(jìn)無(wú)線領(lǐng)域的科技進(jìn)步、技術(shù)創(chuàng)新，為實(shí)現(xiàn)科教興國(guó)戰(zhàn)略，增強(qiáng)中華民族的綜合國(guó)力，為全球信息化及經(jīng)濟(jì)全球化環(huán)境下的國(guó)際社會(huì)與全人類的 發(fā)展而積極貢獻(xiàn)力量。同時(shí)，競(jìng)爭(zhēng)局面的形成，促使運(yùn)營(yíng)企業(yè)積極拓展新業(yè)務(wù)、新應(yīng)用，向用戶提供豐富的選擇，以滿足用戶多方面、多層次的需求。 回顧移動(dòng)通信的發(fā)展歷程，調(diào)制解調(diào)技術(shù)和個(gè)人通信的移動(dòng)性以及無(wú)縫隙覆蓋多媒體綜合業(yè)務(wù)需求將愈來愈突出。泛歐的數(shù)字移動(dòng)通信采用的是 GMSK調(diào)制，而美國(guó)和日本的數(shù)字移動(dòng)通信則采用 QPSK 調(diào)制技術(shù)。隨著調(diào)制技在不斷的發(fā)展，新的調(diào)制技術(shù)將可以帶來更好的頻譜效率和更高的功率效率。 文章針對(duì)三種 基本 調(diào)制解調(diào)技術(shù) 及其改進(jìn)調(diào)制技術(shù) 進(jìn)行了詳細(xì)的仿真和分析，可見，選擇一種調(diào)制技術(shù)是根據(jù)信道特性和應(yīng)用來確定的。 近年來，我們移動(dòng)通信業(yè)務(wù)迅猛發(fā)展，已深入到社會(huì)生活的各個(gè)方面，面對(duì)移動(dòng)用戶群的持續(xù)增長(zhǎng)和新業(yè)務(wù)的層出不窮，移動(dòng)通信體系要及時(shí)適應(yīng)甚至超前于市場(chǎng)需求的步伐。s mobile munication and the Inter development is extremely rapid, but our country at present mobile phone and the work user popular rate very are also low, facing our country 1,300,000,000 populations, our country has the very big development space in the work scale and the capacity the same time, the petition aspect formation, urges the operation enterprise to develop the new service, the new application positively, provides the rich choice to the user, satisfies the user variously, the multilevel , also has the very big development potential on the mobile munication and the Inter application must promote the wireless domain advance in technology, the technological innovation positively, for the realization rely on science and education to rejuvenate the nation strategy, strengt
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