基于RD和CS算法的SAR噪声干扰效果评估与对比

The Evaluation and Contrast of SAR Noise Jamming Effect Based on the RD and CS Algorithm

该文针对RD与CS两种成像算法的差异,首先分析了两种算法在压制性噪声干扰环境下信号与噪声干扰的成像处理增益,推导出两种算法的信号-干扰功率比(信干比)处理增益公式并进行了分析。理论分析结果表明,在采样率仅略大于信号带宽条件下,RD和CS成像算法的信干比处理增益基本一致;在过采样条件下,RD算法由于两维匹配处理从而获得比CS算法大的信干比处理增益,但如果对过采样信号进行滤波处理后,CS算法的信干比处理增益与RD算法一致。最后,采用对计算机仿真数据和真实数据进行处理的方法验证了该文的理论分析和结论。

In according with the difference of the CS imaging processing algorithm and the RD imaging processing algorithm, the signal and the jamming imaging processing gain of the two algorithms is analyzed at the environment of noise jamming. And the formula of the signal-to-jam ratio （SJR） processing gain is deduced and analyzed. The analyzing result demonstrates that the S JR processing gains of the RD and CS imaging algorithm are uniform at the condition of the sampling rate is only larger a little than the band width of the signal. And at the condition of the over sampling rate, the S JR processing gain using RD algorithm is larger than using CS algorithm due to the two dimension matching filter of RD algorithm. However, if the over sampling signal is filtered the S JR processing gain of CS algorithm is uniform with the RD algorithm. The computer simulation testifies the validity and the availability of the conclusion.