摘要
GMSK是目前航空声呐浮标主要使用的数字调频方式。针对查找表(LUT)技术用来替代GMSK数字调制器中复杂的滤波、积分和正余弦函数求解等运算时算法精度不高、资源浪费的问题,基于GMSK调制信号的研究分析,改进了高斯预调制信号的数学模型,推导出关联码元与GMSK各级信号之间的映射关系,选择优化精简的LUT设计GMSK正交调制方案,既保证了算法精度,又使得资源最小化。
GMSK is the main digital frequency modulation mode used by airborne sonar buoy at present.To solve the problems of low accuracy and waste of resources when Look-Up Table(LUT)technology is used to replace the complex filtering integration and sine cosine function solution in GMSK digital modulator based on the research and analysis of GMSK modulation signal the mathematical model of Gaussian pre-modulation signal is improved the mapping relationship between the associated symbol and GMSK signals at all levels is derived and the optimized and simplified LUT is selected to design the GMSK orthogonal modulation scheme which not only ensures the algorithm accuracy but also minimizes resource utilization.
作者
鲁宏捷
LU Hongjie(Luoyang Institute of Electro-Optical Equipment AVIC Luoyang,471000,China)
出处
《电光与控制》
CSCD
北大核心
2023年第8期96-100,共5页
Electronics Optics & Control
