毕业设计（论文）-GMSK调制器的FPGA实现.doc

编号： 毕业设计(论文)说明书 题 目：GMSK调制器的FPGA实现 学 院： 专 业： 学生姓名： 学 号： 指导教师： 职 称： 题目类型：(理论研究 (实验研究 (工程设计 (工程技术研究 (软件开发 2012年 5 月 10 日摘 要 GMSK是当前现代数字调制技术领域的研究热点之一,它通过在MSK调制器之前加入一个高斯低通滤波器来获得更加紧凑的频谱,两条支路信号幅度及正交载波相位失衡。高斯滤波最小频移键控，这是采用的调制方式。数字调制技术是数字峰窝空中接口的重要组成部分。GMSK提高了数字移动通信的频谱利用率和通信质量。本设计基于调制相关原理，利用/FPGA验证自主设计的电路，在以上基础上，自主设计实现了gmsk技术的乘法模块、法模块和抽样判决模块等，通过信号输出比较分析，验证了gmsk算法，达到了系统设计要求，取得了良好效果Abstract GMSK is the current modern digital modulation technology of research in the field of one of the hotspots, It through before joining a MSK modulator in gaussian low-pass filter to get more compact spectrum, GMSK (gaussian minimum frequency shift keying) signal excellent spectrum characteristics in frequency hoppingcommunication have broad application prospects. This paper analyzes the design theory GMSK modulator, And FPGA to realization. Simulation results show that, This digital realization structure produces GMSK baseband signal has good power spectrum, Also can effectively avoid two branch signal amplitude and orthogonal carrier phase unbalanced. Gaussian filtering minimum FSK, This is GSM system USES modulation mode. Digital modulation technique is digital peak nest of mobile communication system is an important part of the air interface. GMSK improved digital mobile communication frequency spectrum availability and communication quality. This design based on the GMSK modulator related principles, use of MATLAB/FPGA validation GSMK modulation circuit of independent design, On the basis of the above, Independent design and realize the multiplication of GMSK modulation technology, addition module and sampling module judgment module, Through comparative analysis of its output signal, Verify the algorithm GMSK modulation, Reached system design requirements, Achieved good results. Key words: GMSK；FPGA；MATLAB；digital