摘要
针对宽带数字信号侦察问题,首先推导了一种实信号数字信道化接收机的高效结构,便于实现高倍抽取,接着将信号检测与瞬时测频技术应用于该结构中,推导了将瞬时测频用于此结构时的条件。针对跨信道信号的处理问题,提出了一种改进的滤波器组排列方法,通过滤波器组通带重叠的方式来处理跨信道信号,该方法在信号带宽较窄时能较好地处理跨信道信号。仿真结果表明,所设计的系统具有良好的性能,对跨信道信号有较好的处理效果。
In order to receive wideband signals, an efficient architecture of digital channelized receiver with the property of high decimation factor is devised in this paper. Furthermore, digital signal detection and instantaneous frequency measurement（IFM） technologies are applied to this architecture and the requirement for using IFM technology is acquired. A new kind of filterbank that can deal with the cross-channel signal by pass-hand overlap when the bandwidth of signal is narrow is also proposed. The simulation results show the effectiveness of the new structure and verify the correctness of the new filterbank when dealing with the cross-channel signals.
出处
《雷达科学与技术》
2012年第5期539-543,共5页
Radar Science and Technology
基金
863计划资助课题(No.2011AA703102A)
关键词
实信号
数字信道化
瞬时测频
跨信道信号
real signal
digital channelization
instantaneous frequency measurement （IFM）
crosschannel signal
