摘要
为了模拟脉内线性调频、脉间频率捷变体制下某型号雷达的地海杂波,在利用距离多普勒网格法计算常规PD(pulse-Doppler)雷达地海杂波功率谱的基础上,从脉内子脉冲叠加的观点分析线性调频信号对常规雷达杂波功率谱和幅度分布特性的影响,进而分析频率捷变所引起的脉间相关性减弱和时间随机序列方差的减小。得出的结论有:线性调频-频率捷变体制雷达杂波的功率谱与对应常规雷达的形状基本吻合,而幅值的变化与脉压比有关;该体制雷达的杂波随机序列服从瑞利分布,雷达参数变化导致杂波随机序列的方差变化。最后给出某攻击状态下的仿真实例。
To simulate the clutter received by the certain radar which is linear frequency-modulated （LFM） in each pulse and frequency-agile with pulse to pulse （LFM-FA radar）, the power spectrum of the clutter of pulse-Doppler （PD） radar is calculated by means of the range-Doppler grid procedure first. Then the influence to the power spectrum and amplitude characteristic brought by the LFM waveform is analyzed in the view of subpulses＇ accumulation, thus the decrease of the correlation and variance about the clutter signal brought by frequency agility is analyzed. Some conclusions are gained. The shape of the power spectrum about the LFMFA radar clutter is similar to that of PD radar＇s. The change of their power ratio relates to the time-band product. The clutter of the LFM-FA radar is the Rayleigh distribution. Its variance change is the function of the radar parameters. An instance is given.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2007年第7期1070-1072,共3页
Systems Engineering and Electronics
基金
总装预研重点基金资助课题(9140A03010106HK0201)
关键词
雷达信号处理
雷达杂波
线性调频信号
频率捷变
radar signal process
radar clutter
linear frequency-modulated （LFM）
frequency-agile
