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在采用数字射频存储器(DRFM)实施相干欺骗干扰时,DRFM相干特性的好坏直接影响到干扰的实施效果,它是DRFM系统的一项重要性能指标。本文分析了影响DRFM相干特性的原因(离散时域采样、A/D变换,时钟信号稳定度和相位不连续性),针对相位不连续性对DRFM相干性能的影响,提出了利用数字相位校正技术来改善DRFM相干特性的方法。利用这种方法可以大大地改善DRFM的相干性能,提高DRFM储频精度。
When DRFM is used to implement coherent cheating interference, the coherence of DRFM affects the implementation of interference directly, which is an important performance index of DRFM system. In this paper, the causes of DRFM coherence (discrete time-domain sampling, A / D conversion, clock signal stability and phase discontinuity) are analyzed. In view of the influence of phase discontinuity on DRFM coherence performance, a digital phase correction technique To improve the coherence of DRFM characteristics. Using this method can greatly improve the coherence performance of DRFM and improve the DRFM storage accuracy.