radio frequency noise meaning in English
射频噪声
Examples
- However , psm also have some disadvantages , for example , the output voltage ripple is large at light load and the system maybe produce radio frequency noise
但psm也具有不可避免的缺点:轻载时输出电压纹波较大,且易引入音频噪声。 - Then on one hand , author makes researches of anti - jamming against pulse jamming 、 gauss white noise jamming and radio frequency noise jamming from the side of signal processing . author exercises much signal processing knowledge of time - domain sliding window accumulation 、 wavelet analysis 、 time - frequency analysis and linear prediction and carries out many simulation experiments . on the other hand , author proposes the anti - jamming methods of using a sar similar to double - base radar and modulating the amplitude 、 the phase of emission signal and changing the frequency modulation slope from the side of changing sar system model
作者首先提出了合成孔径雷达抗干扰的定义、分类以及评价抗干扰方法好坏的主客观标准；然后，一方面从信号处理的角度出发对脉冲式干扰、高斯白噪声干扰以及射频噪声干扰进行了抗干扰研究，其中运用了时域滑动窗口积累，小波分析，时频分析以及线性预测等信号处理知识，做了大量的仿真实验；另一方面，本文基于改变合成孔径雷达系统模式提出了利用类似双基地雷达来抗干扰，以及对发射信号进行调幅、调相以及改变调频斜率来抗干扰，同样做了相应的仿真实验。 - Some valuable conclusions are summarized by theoretical analysis and simulation experiments : from the side of signal processing , pulse jamming can be deleted by the method of time - domain sliding window accumulation and can be restored by interpolative prediction . ; gauss white nose can be attenuated while jamming disperse point - target by the method of time - frequency analysis in time - frequency domain . ; radio frequency noise jamming can be deleted by the method of average range frequency spectrum and notching in frequency domain
通过大量的理论分析和仿真实验，得到了一批具有一定价值的结论：从信号处理的角度出发，对于脉冲式干扰，能够运用时域滑动窗口积累的方法去掉，并且通过预测插值得到较好的恢复；对于高斯白噪声干扰，在时频变换域内应用时频分析方法可减小其对分散点目标的干扰；对于射频噪声，通过平均距离频频法和频域陷波的方法可以去掉；从改变合成孔径雷达系统角度出发，类似双基地雷达能够避免各种干扰，对发射信号进行调幅，调相以及改变调频斜率都是较好的抗干扰方法。