Costas编码跳频信号对速度非常敏感,精确速度补偿是这种信号用来成像的关键。文中分析了速度对Costas跳频信号回波的影响,设计了一种综合测速方法,该方法将互相关测速、步进补偿和时间积累测速3种方法结合起来,逐步提高测速精度,不仅减少了计算量,满足了系统实时处理的要求,同时提高了测速精度,降低了因为速度影响引入的相位噪声。

Costas frequency hopping signal is very sensitivity to velocity changes, and the accurate velocity compensation is the key point to image. The phase change of Costas frequency hopping radar echo is analyzed in this paper, and a velocity measurement is designed using correlation, step-compensation and time accumulation. This measurement can fulfill the real-time requirement of system by reducing calculation. The measuring precision is enhanced and the phase noise is reduced at the same time.

国家自然科学青年基金资助项目