Carrier Tracking Technology of High Dynamics Spread Spectrum Signal Based on Software
-
摘要: 高动态环境中,由于载体的动态变化范围大,使得所发射信号的多普勒频移、一次变化率、甚至二次变化率都比较大,这对于完成信号的正确解调提出了很高的要求.因而又给出了一种用复合软环来跟踪高动态载波信号的方法,实现了基于数字信号处理器的接收机,并且验证了此方案切实可行,完全达到各种性能要求.Abstract: In high dynamics environment, the movement of object changes sharply, so the transmitted signal has some special characters: larger Doppler frequency shift, the first order derivative and the second order derivative. It is difficult to demodulate correctly. A method of compound software loop of tracking the carrier was presented. The receiver is realized on DSP, and the result of the experiment approves that the project is feasible.
-
[1] 孙白波.遥控,安全,监控[M].北京:宇航出版社,1995. [2]沈允春.扩谱技术[M].北京:国防工业出版社,1995. [3]张厥盛,郑继禹.锁相技术[M]. 西安:西安电子科技大学出版社,1996. [4]Natali F D. Noise performance of a cross-product AFC with decision feedback for DPSK signals[J]. IEEE Trans on Communications,1986,34(3):303~307. [5]Natali F D. AFC tracking algorithms[J]. IEEE Trans on Communications, 1984,32(8):935~947. [6]Cahn C R, Leimer D K, Marsk C L, et al. Software implementation of a PN spread spectrum receiver to accommodate dynamics[J]. IEEE Trans on Communications, 1997,25(8):832~839. [7]Hinedi S, Statman J. Digital accumulators in phase and frequency tracking loops[J]. IEEE Trans on AES, 1990,26(1):169~179. [8]罗宾斯W P. 相位噪声[M].北京:人民邮电出版社, 1998. -
点击查看大图
计量
- 文章访问数: 3232
- HTML全文浏览量: 139
- PDF下载量: 1042
- 被引次数: 0
下载:
