摘要
针对基于软件无线电的FSK调制,用理论推导得到了基带信号相位变化率来表征FSK载波频率调制的理论依据,用MATLAB仿真了数据产生、映射、高斯滤波、相位积分、相位-幅度转换和正交调制等FSK调制的链路级设计,用XC5VSX35T、AD9779等芯片完成了PN序列生成、滤波因子卷积、正余弦寻址查找、混频求和等FSK调制的电路实现,最后通过对生成FSK信号的实际测量,验证了该实现方法的有效性。
In view of FSK modulation based on software radio,the theoretical basis for characterizing FSK carrier frequency modulation by phase change rate of baseband signal is deduced. Link-level design of FSK modulation such as data generation,mapping,Gauss filtering,phase integration,phase-to-amplitude conversion and quadrature modulation is simulated by MATLAB.The circuit implementation of FSK modulation such as PN sequence generation,filtering factor convolution,sine-cosine addressing search and mixing summation is completed by XC5VSX35T,AD9779 and other chips. Finally,the effectiveness of the implementation method is verified by the actual measurement of the generated FSK signal.
作者
铁奎
周建烨
刘小刚
TIE Kui;ZHOU Jian-ye;LIU Xiao-gang(The 41st Institute of China Electronics Technology Group Corporation,Bengbu 233010,China)
出处
《电子设计工程》
2019年第10期45-49,共5页
Electronic Design Engineering
基金
国家科技重大专项(2018ZX03001026)
关键词
FSK
映射
高斯滤波
相位-幅度转换
正交调制
FSK
mapping
Gauss filtering
phase-to-amplitude conversion
quadrature modulation
