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500MHz，载频为2400MHz，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-55dB。

Generation of wide-band(WB) pulse compression(PC) signals is a very important technique for some modern 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.

TN957