基于FPGA的MSK調(diào)制解調(diào)器的設(shè)計(jì)與仿真

論文編號(hào):JD1172  論文字?jǐn)?shù):10913,頁數(shù):35  附任務(wù)書，開題報(bào)告，文獻(xiàn)綜述，外文翻譯，中期檢查

畢業(yè)設(shè)計(jì)說明書（論文）中文摘要

 本文根據(jù)數(shù)字信號(hào)MSK調(diào)制和解調(diào)的工作原理，采用模塊化設(shè)計(jì)了一種基于FPGA芯片的MSK調(diào)制解調(diào)器。在調(diào)制過程中，利用數(shù)控振蕩器NCO完成對MSK信號(hào)的調(diào)制，得到連續(xù)的MSK調(diào)制信號(hào)。用差分解調(diào)法對調(diào)制信號(hào)進(jìn)行解調(diào)，然后使用FIR數(shù)字濾波器完成濾波。使用VHDL語言進(jìn)行了模塊設(shè)計(jì)和時(shí)序仿真，仿真時(shí)，簡單介紹了MSK信號(hào)調(diào)制與解調(diào)算法的Matlab仿真，重點(diǎn)介紹了MSK信號(hào)調(diào)制與解調(diào)的FPGA實(shí)現(xiàn)，然后用Modelsim仿真驗(yàn)證所設(shè)計(jì)的調(diào)制解調(diào)器是否正確。所設(shè)計(jì)的調(diào)制解調(diào)器具有體積小、功耗低、集成度高、軟件可移植性強(qiáng)、抗干擾能力強(qiáng)的特點(diǎn)，符合目前通信技術(shù)設(shè)計(jì)的發(fā)展方向。

關(guān)鍵詞  MSK信號(hào)  FPGA  VHDL  NCO  差分解調(diào)

畢業(yè)設(shè)計(jì)說明書（論文）外文摘要

Title          Design and Realization of an                                  
                   MSK Modem Based on FPGA          _                                            

Abstract
In this dissertation, we design a MSK modem based on FPGA adopting the method of module on the grounds of the principle of digital signal MSK modulation and demodulation. In the modulation process, we use the NCO on the MSK signal modulation to get the consecutive MSK signal, and differential demodulation method are used on the modulation signal demodulation to get the demodulation signal. Then we use the FIR digital to complete the filtering. The VHDL Models are designed and simulated, on the simulation, a simple Matlab simulation of the MSK modulation and demodulation algorithm are introduced, focuses on the FPGA implementation of the MSK modulation and demodulation， then use the Modelsim simulation to correct the modem. The designed modem has the characteristics of small size, low consume, high integration, strong soft replant and high anti-interference, it is accordance with the direction of future communication technology design.

Keywords  MSK Signal  FPGA  VHDL  NCO   Difference Demodulation

目   次

1  引言 1
2  調(diào)制解調(diào)技術(shù)相關(guān)知識(shí)簡介 2
2.1  MSK信號(hào)的簡介 2
2.2  數(shù)字控制振蕩器介紹 6
2.3  濾波器原理 8
3  調(diào)制與解調(diào)算法設(shè)計(jì)及模型建立 10
3.1  MSK信號(hào)的調(diào)制及Matlab仿真 10
3.2  MSK信號(hào)的解調(diào)及Matlab仿真 11
4.1  設(shè)計(jì)簡介 13
4.2  FPGA芯片簡介 13
4.3  數(shù)控振蕩器的FPGA實(shí)現(xiàn) 14
5  MSK解調(diào)的FPGA實(shí)現(xiàn)及Modelsim仿真 16
5.1  設(shè)計(jì)簡介及模塊劃分 16
5.2  輸入緩沖及差分相乘模塊的FPGA實(shí)現(xiàn) 16
5.3  數(shù)字濾波器的FPGA實(shí)現(xiàn) 17
結(jié)論 19
致謝 20
參考文獻(xiàn) 21
附錄A  Matlab仿真程序 22
附錄B  Modelsim仿真程序 24