罗兰-C脉冲信号周期的数字识别及SOPC实现  

Digital algorithm realized with SOPC for cycle identification of LORAN-C

作　　者：邹德财[1] 边玉敬[1] 吴海涛[1] 苏建峰[1] 李云[1] 

机构地区：[1]中国科学院国家授时中心

出　　处：《哈尔滨工业大学学报》2005年第12期1644-1646,1702,共4页Journal of Harbin Institute of Technology

基　　金：国家自然科学基金资助项目(10443001)

摘　　要：在罗兰-C接收机的数字化软件实现过程中提出一种新的周期识别算法,同时验证其正确性、有效性以及在SOPC上的可实现性.该算法对每个脉冲进行大量采样,用MATLAB模拟天波干扰情况下的各种罗兰信号提出算法并进行验证,用MODELSIM仿真实现.根据采样值识别标准周期过零点,给出了相位编码信息,在有噪声干扰及天波污染的情况下,提高了周期识别过程的弹性,完全实现了对罗兰-C周期识别的数字化.同时,利用可编程片上系统(SOPC)的部分资源实现了这种方法.验证及仿真证明该算法能够满足现代数字罗兰-C接收机对周期识别算法的要求.A new method for cycle identification is hoped to be introduced in the digital software process of LORAN -C receiver and, at the same time, it is validated to be right, available and realizable in the SOPC chip. On the basis of Loran - C sampling pulse signals, which are interfered by MATLAB simulated skywave, an identification algorithm is put forward and realized with MODELSIM. This method increases the resilience of the identification process in the presence of noise and skywave and realizes the digital of cycle identification algorithm for LORAN - C. The signal processing is realized with SOPC and the simulation results show that the requirements of the digital Loran - C receiver can be met.

关 键 词：周期和值法 信噪比 罗兰-C MATLAB SOPC 

分 类 号：TN96[电子电信—信号与信息处理]