摘要
在非合作接收中,常常会面临接收带宽内多路通信问题,其信号带宽、位置及个数对接收端来说都是未知的,在现代电子战中,信号还往往具有时变性。针对此问题,本文提出一种针对时变均匀分布信号的自适应信道化接收算法及其系统实现方案,该方法包含动态信道化内核设计、无盲区接收、频谱拼接、参数估计以及偏差校正自适应接收,能够在缺乏先验信息的前提下对均匀分布的时变中频多路信号进行信道化接收。实验结果表明,该方案能有效克服频偏等未知因素的影响,使各路输出的中心频点较准确的对准0频,在无人值守的情况下实现自适应接收。
The problem of existing several sub-band signals in the receiver bandwidth is often faced with in the non-cooperation situation. Meanwhile,the bandwidth,location and number of the signals are unknown to receiver,and the signals are often time-varying in the modern electronic warfare. For this situation,An adaptive channelization technology of filterbanks,which is designed for time-varying and uniform distributing signal,is proposed and confirmed in the processing platform. By means of designing a dynamic channelized IP core,receiving signal without blind-zone,Spectrum splicing,parameter estimation and the receiver＇s offsets correction,the IF signals can be channelized received in the absence of priori information. Experiments show that the program can effectively overcome the effects of frequency offset and other unknown factors,and makes center frequencies of output signals align to 0 frequency accurately. Finally the unattended channelized receiver is achieved.
出处
《信号处理》
CSCD
北大核心
2015年第5期602-610,共9页
Journal of Signal Processing
关键词
时变均匀分布信号
信道化滤波
信道化内核
自适应接收
频偏
time-varying and uniform distributing signal
channelization filtering
channelization core
adaptive receiver
frequency offset
