摘要
介绍一种新型全数字GMSK调制实现算法及其实现结构,实现在线更新调制参数功能,在仪器仪表应用中具有很高的实用价值。在传统数字实现结构中往往直接包含数字高斯滤波器和数字相位积分器,因此调制过程中避免不了会产生各种截取误差,影响调制精度。新型算法的实现充分利用了DSP的计算功能和计算速度,在DSP内部实现高斯滤波及相位积分,避免了传统数字实现结构中的各种截取误差,并实现在线更新FPGA内部调制查找表数据的功能。理论分析和实验结果表明新型算法及其实现结构能有效的估计调制误差并提高调制精度。
Introducing a new algorithm of digital GMSK modulation and its implementation which achieves updating modulation parameters online and it has high practical value in instrumentation applications.The traditional direct digital implementation structure often includes digital Gaussian filter and digital phase integral,so the modulation can not be avoided to produce a variety of interception errors which will affect the modulation accuracy during modulation.The new algorithm and implementation make full use of DSP＇s computing power and computing speed,implement the Gaussian filter and phase integral in DSP,avoid the interception errors in the traditional structure,achieve the function of updating the modulation parameters in lookup table within FPGA online.Theoretical analysis and experimental results show that the new algorithm and its implementation structure can effectively estimate modulation error and increase the modulation accuracy.
出处
《电子测量技术》
2010年第11期41-45,共5页
Electronic Measurement Technology
