【正文】 復(fù)合信號，不能直接由示波器觀察，通過一plex to magnitudeangle模塊將調(diào)制信號分為幅度和相角兩個(gè)變量來觀察。由于濾波形成的高斯脈沖包絡(luò)無陡峭的邊沿，亦無拐點(diǎn)，所以經(jīng)調(diào)制后的已調(diào)波相位路徑在MSK的基礎(chǔ)上進(jìn)一步得到平滑，它把MSK信號的相位路徑的尖角平滑掉了，因此頻譜特性優(yōu)于MSK和FSK。)。%瑞麗信道誤碼率x=0:10。誤碼率39。不奮斗就是每天都很容易，可一年一年越來越難。xlabel(39。bd39。)。比較三條曲線，可以看到其差別并不大。New traces per display 是每次重新顯示的徑的數(shù)目。GMSK Demodulator Baseband是GMSK基帶解調(diào)器。 GMSK信號產(chǎn)生器該模塊的參數(shù)設(shè)計(jì)這只主要包括以下幾個(gè)[3]。為計(jì)算系統(tǒng)誤碼率，則在調(diào)制器后加一誤碼率計(jì)算模塊，計(jì)算誤碼率。關(guān)鍵詞：GMSK，瑞利信道，SimuLink仿真，誤碼率曲線Abstract Gaussian filtering minimum frequency shift keying (GMSK) the characteristics of the System is in the MSK (minimum frequency shift keying) modulator before insert gaussian lowpass preset System filter to preset System filtering, so GSMK modulation signal spectrum pact, error characteristics, in the digital Mobile munication has been widely used, such as now widely used GSM (Global System for Mobile munication) Mobile munication System is to use GMSK modulation mode. This paper mainly in the Rayleigh channel, through the Simulink in Matlab building simulation model simulation. And through the observation GMSK modulation and demodulation system signal waveform and spectrum diagram, eye diagram and bit error rate curve, which testified GMSK system is relatively good performance. Keywords: GMSK, Rayleigh channel, SimuLink, bit error rate curveGMSK調(diào)制與解調(diào)系統(tǒng)的設(shè)計(jì)第1章 緒論高斯濾波最小頻移鍵控（Gaussian Filtered Minimum Shift Keying）是GSM系統(tǒng)采用的調(diào)制方式。由于濾波形成的高斯脈沖包絡(luò)無陡峭的邊沿，亦無拐點(diǎn)，所以經(jīng)調(diào)制后的已調(diào)波相位路徑在MSK的基礎(chǔ)上進(jìn)一步得到平滑，它把MSK信號的相位路徑的尖角平滑掉了，因此頻譜特性優(yōu)于MSK和SFSK。前置濾波器以高斯型最能滿足上述條件，這也是高斯濾波器最小移頻鍵控(GMSK)的由來。BT=。示波器scope1的number of axes 為2表明有縱坐標(biāo)個(gè)數(shù)為2；time range表示時(shí)間軸的顯示范圍，設(shè)為auto,表示時(shí)間軸的顯示