全去斜坡技术在雷达高度计上的应用

Deramp technique’s application of ocean radar altimeter on board

为提高雷达系统测量精度及分辨力，在研制海洋雷达高度计中采用了全去斜坡技术。在分析了全去斜坡技术原理的基础上，进行了较详尽的数学推导。该技术采用频率变换方法，能获得用脉冲压缩方法无法达到的压缩效果，从而提高测量精度和分辨力。应用实践表明，该技术可使脉冲压缩比提高到１０００倍，分辨力达到５ｃｍ，大大提高了高度计的测量精度。

In order to improve the measuring accuracy and discriminability of radar sys- tem,the deramp technique is applied by the ocean altimeter. The principle of full deramp technique is analyzed and deduced thoroughly in mathematics, The techneque which applies frenquency transformation achieves the progress that is hardly made by pulse compression,so it can improve the measuring accuracy and discriminability.In practical it is proved that the technique can make the ratio of pulse compression to reach 1000 times,and achieves 5 cm discrim- inahility,the measuring accuracy of altimeter is greatly enhanced.