資源描述:
《擴(kuò)頻信號(hào)的BPSK調(diào)制仿真》由會(huì)員上傳分享,免費(fèi)在線(xiàn)閱讀,更多相關(guān)內(nèi)容在教育資源-天天文庫(kù)。
1、《控制系統(tǒng)CAD與數(shù)字仿真》2014~2015學(xué)年第一學(xué)期學(xué)院(部)電子電氣工程學(xué)院學(xué)號(hào)021211229姓名紀(jì)辰授課教師陳劍雪擴(kuò)頻信號(hào)的BPSK調(diào)制仿真摘要:隨著數(shù)字信號(hào)處理技術(shù)的不斷發(fā)展,數(shù)字化軟件無(wú)線(xiàn)電接收機(jī)已經(jīng)成為趨勢(shì),調(diào)制/解調(diào)技術(shù)是數(shù)字通信系統(tǒng)中的核心技術(shù)?,F(xiàn)代計(jì)算機(jī)科學(xué)技術(shù)快速發(fā)展,使得通信系統(tǒng)仿真的設(shè)計(jì)和分析過(guò)程變得相對(duì)直觀和便捷,由此也使得通信系統(tǒng)仿真技術(shù)得到了更快的發(fā)展。通信系統(tǒng)仿真具有廣泛的適應(yīng)性和極好的靈活性,有助于更好地研究通信系統(tǒng)性能。本文介紹了數(shù)字化調(diào)制解調(diào)技術(shù)的現(xiàn)狀
2、發(fā)展及其應(yīng)用,然后介紹了BPSK數(shù)字調(diào)制解調(diào)的理論基礎(chǔ),重點(diǎn)分析了BPSK數(shù)字調(diào)制和解調(diào)的原理。本文利用MATLAB強(qiáng)大的仿真功能,在其仿真環(huán)境下建立了直擴(kuò)系統(tǒng)和BPSK調(diào)制解調(diào)系統(tǒng)仿真模型,給出各路觀察波形,證實(shí)了解調(diào)算法的可行性。最后,本文對(duì)所做研究工作進(jìn)行了總結(jié),并且提出了今后的工作和研究方向。關(guān)鍵詞:BPSK;調(diào)制解調(diào)器;MATLAB;直擴(kuò)系統(tǒng)ThesimulationofspreadspectrumsignalwithBPSKdigitalmodulationAbstract:Withd
3、igitalsignalprocessingtechnologycontinuestoevolve,digitalsoftwareradioreceiverhasbecomeatrend,modulation/demodulationtechnologyisthecoretechnologyindigitalcommunicationsystem。Therapiddevelopmentofmoderncomputerscienceandtechnology,makesthecommunicatio
4、nssystemsimulationdesignandanalysisprocessbecomerelativelyintuitiveandconvenient,whichalsomakesthecommunicationsystemsimulationtechnologyhasbeenfasterdevelopment.Communicationsystemsimulationwithwideadaptabilityandexcellentflexibility,helpstobetterstu
5、dythecommunicationsystemperformance.Thispaperintroducesthedigitalmodemtechnologysituationanddevelopment.ThenintroduceddigitalmodulationanddemodulationofBPSKtheoreticalfoundation,includinganalysisoftheBPSKdigitalmodulationanddemodulationprinciple.Inthi
6、spaper,basedonthepowerfulsimulationusingMATLABfunctioninitsenvironmentdesignedthespreadspectrumsignalsystemandtheBPSKmodulationdemodulationsystemsimulationmodel,andthroughtheconstellationconfirmedthatthedemodulationalgorithm.Finally,thispapermadeasumm
7、aryoftheresearchwork,andproposedfutureworkandresearchdirections.Keywords:BPSK,Modem,MATLAB,Spreadspectrumsignalsystem目錄一、引言51.1研究背景及其意義51.2數(shù)字化調(diào)制解調(diào)技術(shù)的現(xiàn)狀發(fā)展及其應(yīng)用51.3MATLAB的簡(jiǎn)介6二、BPSK調(diào)制解調(diào)原理72.1BPSK信號(hào)調(diào)制原理72.2BPSK信號(hào)解調(diào)原理9三、擴(kuò)頻信號(hào)的BPSK調(diào)制系統(tǒng)設(shè)計(jì)仿真103.1基本擴(kuò)頻系統(tǒng)仿真流程圖103.
8、2生成m序列及m序列性質(zhì)113.3生成50位隨機(jī)待發(fā)送二進(jìn)制比特序列及進(jìn)行擴(kuò)頻編碼123.4對(duì)擴(kuò)頻前后信號(hào)進(jìn)行BPSK調(diào)制并觀察其時(shí)域波形133.5計(jì)算并觀察擴(kuò)頻前后BPSK調(diào)制信號(hào)的頻譜13四、總結(jié)與展望144.1總結(jié)144.2展望15參考文獻(xiàn)16附錄17一、引言1.1研究背景及其意義隨著數(shù)字信號(hào)處理技術(shù)的不斷發(fā)展,數(shù)字化軟件無(wú)線(xiàn)電接收機(jī)已經(jīng)成為趨勢(shì)。在衛(wèi)星通信、移動(dòng)通信、微波通信、光纖通信等現(xiàn)代通信系統(tǒng)中,信道中傳輸?shù)亩际菙?shù)字已調(diào)信號(hào),稱(chēng)它們?yōu)閿?shù)字調(diào)制系統(tǒng)。數(shù)字調(diào)制技術(shù)是數(shù)字通