自动扫频短波信道斜向探测系统设计与实现  

Design and implementation of an automatic scanning frequency high frequency channel oblique sounding system

作　　者：刘月亮[1,2] 蒋宇中[1] 张春雷[1] 张伟[1] 

机构地区：[1]海军工程大学电子工程学院 [2]海军91269部队

出　　处：《电波科学学报》2013年第1期197-203,共7页Chinese Journal of Radio Science

摘　　要：基于全球定位系统时间同步手段和锁相环频率同步技术,利用数字信号处理器、复杂可编程逻辑器件等实现了自动扫频短波信道斜向探测系统的数据采集与发送硬件终端,搭载短波电台和计算机组成自动扫频短波信道斜向探测系统的硬件,开发了配套软件.所设计系统的收发端时间同步误差和频率同步误差都几乎为零,可以以数十瓦的发射功率实现短波信道的高精度探测.分析了系统的数字信号处理流程,进行了武汉和商丘之间的短波信道斜向探测实验,对探测结果进行了分析,分析表明,探测结果能够提供短波信道传播特性的基本信息.The data transmitting and collecting hardware terminal of the automatic scanning frequency HF channel oblique sounding system （ASFHFCOSS＇） was de- signed based on the time synchronization means of global position system and the frequency synchronization technique of phase-locked loop. The terminal was imple- mented by making use of digital signal processor, complex programmable logic de- vice, etc. The ASFHFCOSS hardware consists of the terminal related above and an HF transmitter-receiver, together with a computer. The software of the system was developed. The time synchronization error and the frequency synchronization error of the system are nearly zero, which make the high precise sounding of HF channel with a low transmitting power of tens of watts be possible. The digital sig- nal processing procedure of the system was analyzed. Further, the HF channel ex- periments between Wuhan and Shangqiu were done in scanning frequency mode. The analyses of the data obtained were made, which show that the results from the sounding using ASFHFCOSS are capable of providing the basic information of HF channel properties.

关 键 词：短波信道 斜向探测 冲击响应 散射函数 

分 类 号：TN011.2[电子电信—物理电子学]