摘要
根据实际的应用背景,针对高动态的突发短帧信号的特性,研究其信号快速捕获问题,提出了一种适应高动态环境,捕获时间短的捕获方法。该方法采用一种频率分割的方案,将大的多普勒频偏分割为若干小频率段,每个频率段并行处理,采用等待式的数字相关处理办法,各自完成相关积累和视频积累,并经过自适应门限判决,输出同步信号检测脉冲,完成伪码的快速捕获。
According to characteristics of highly dynamic outburst short-frame signals in practical applications, fast acquisition of these signals is studied. And a frequency-segmentation method suitable to high dynamic environment and with short acquisition time is proposed. This method divides the bigger Doppler's frequency-shift up to some smaller frequency segments; then parallel processing is applied to each segment;then waiting-style digital correlation processing method is used to perform correlating and video accumulation; finally synchronized signal detection impulse is produced after the self-adapted threshold judgment to perform pseudo-code fast acquisition.
出处
《无线电工程》
2008年第4期25-27,42,共4页
Radio Engineering
关键词
高动态
频率分割
多普勒
伪码快速捕获
突发信号
high dynamic
frequency-segmentation
Doppler
pseudorandom code rapid acquisition
outburst signals