中文说明：通过步进频率技术进行带宽合成，通过脉冲压缩，验证先压缩与后压缩的区别。结果表演，压缩后拼接与拼接后压缩效果一致。
English Description：
The difference between the first compression and the second compression is verified by pulse compression. The results show that the compression effect after compression is consistent with that after splicing.