摘要
宽带脉冲压缩信号的产生是一些现代雷达的关键技术之一。随着存储器存取速度和D/A转换器转换速率的提高,直接数字波形合成法产生宽带信号越来越容易实现,而且也得到越来越广泛的应用。该方法再结合正交调制和倍频链,就能产生所需要的宽带脉冲压缩信号。文中,宽带脉冲压缩线性调频信号产生系统带宽可达500 MHz,载频为2400 MHz,该系统可以对信号失真进行一定程度的校正。测试结果表明带外杂散和谐波均低于-55 dB。
Generation of wide-band （WB） pulse compression （PC） signals is a very important technique for some modem radars. Direct digital waveform synthesis （DDWS） can implement easier and easier with speeding up of memory and D/A converter, and application of DDWS becomes more and more widely. DDWS, combined with orthogonal modulator （OM） and double frequency chain, is a suitable selection to generate WB PC signal. In this paper, this wide-band pulse compression signal generation system, which can generate LFM signal with 500 MHz bandwidth at 2 400 MHz radio frequency is introduced. Distortion of the system can be corrected in some degree. The test results show that spurious components and harmonics are below -55 dB.
出处
《现代雷达》
CSCD
北大核心
2006年第1期68-70,75,共4页
Modern Radar
