中文摘要：移頻鍵控（FSK）是數(shù)據(jù)通信中最常用的一種調(diào)制方式。FSK方法簡(jiǎn)單易于實(shí)現(xiàn)，并且解調(diào)不需要恢復(fù)本地載波，可以異步傳輸，抗噪聲和抗衰落性能較強(qiáng)。缺點(diǎn)是占用頻帶較寬，頻帶利用不夠經(jīng)濟(jì)。FSK主要應(yīng)用于低中速數(shù)據(jù)傳輸，以及衰落信道和頻帶較寬的信道中。MATLAB 可以用來(lái)進(jìn)行通信領(lǐng)域的研究、開(kāi)發(fā)、系統(tǒng)設(shè)計(jì)和仿真。闡述了計(jì)算機(jī)仿真的發(fā)展概況，及其重要意義，著重介紹了MATLAB的基礎(chǔ)知識(shí)和其重要工具--動(dòng)態(tài)仿真軟件SIMULINK的基本操作。利用MATLAB中的仿真工具SIMULINK建立了FSK仿真模型，并對(duì)仿真模型進(jìn)行了測(cè)試,經(jīng)結(jié)果分析表明，仿真結(jié)果與理論基本一致。

關(guān)鍵詞 ： FSK ； MATLAB ； 仿真 ； 調(diào)制解調(diào)































Title : FSK modulation system design based on MATLAB

Abstract: Frequency Shift Keying (FSK) is a data communication most commonly used as a
modulation mode. FSK method is simple, easy to implement, and demodulation not restore local
carrier, ATM, Anti-noise and anti-fading strong performance. The drawback is a wide band
occupation, the economy enough bandwidth utilization. Hence, FSK is mainly applied into data transport in low or medium rate and in fading channel or channels with relative wide bandwidth. MATLAB can be used for communications in the research, development, system design and simulation. Expounded on the development of computer simulation profiles and its significance MATLAB highlights of the basic knowledge and its important tools -- dynamic simulation software SIMULINK base the operation. Using MATLAB Simulink simulation tools were established FSK modulation model coherent, as well as simulation models were tested, the results show that the simulation results agreed with the basic theory.

Keywords： FSK ; MATLAB ; simulation ; modulation; demodulation




















目錄


第1章 緒論 5
1.1課題研究背景方法及目的 6
1.2 課題設(shè)計(jì)要求 7
1.3 課題設(shè)計(jì)步驟 7
1.4 MATLAB概述 7
第2章 FSK系統(tǒng)的理論綜述 13
2.1數(shù)字調(diào)制解調(diào) 13
2.2 頻移鍵控（FSK） 14
2.2.1 FSK的調(diào)制原理 14
2.2.2 FSK的解調(diào)原理 15
第3章 FSK在MATLAB環(huán)境下的仿真 16
3.1FSK在MATLAB環(huán)境下的仿真過(guò)程與結(jié)果 15
3.2 FSK在MATLAB環(huán)境下的分析 19
3.2.1 FSK在MATLAB環(huán)境下的優(yōu)劣 19
3.2.2 FSK的解調(diào)實(shí)現(xiàn) 19
3.2.3 FSK信噪比對(duì)誤碼率的影響分析 21
第4章 總結(jié) 23
致謝 24
參考文獻(xiàn) 25
附錄 26