期刊文献+

通道失配对超视距雷达DBF副瓣电平的影响 被引量:7

The frequency response mismatch between the channels and its effects on the sidelobe level of OTH radar
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摘要 在超视距雷达中 ,需要经过 FFT来获得距离信息。FFT对于正弦信号而言是匹配滤波器 ,随着积累时间的增加匹配滤波器的带宽会随之减少。不同距离单元的幅相不一致性与不同的频率相对应。随着 FFT点数的增加 ,每个距离门对应的带宽会不断减小 ,带内的起伏会随之减小。同一距离门之间的幅相误差趋于固定 ,经过校正后 ,DBF的性能也会有提高 。 In OTH radars, the range information is obtained by FFT. The FFT is a match filter for sinusoid signal, and the band width of the match filter will decrease with increase in integrated time . In a particular range gate , the inconsistancy of amplitude and phase between the channels is corresponding to that of a particular band. As the band of the filter decreases, the viariation of amplitude and phase inconsistancy in the band will decrease too. The inconsistancy between the channels tends to a fixed value. After calibration, the performance of the DBF will be improved. The requirement of OTH radar for the amplitude and phase consistancy between channels will be relaxed.
出处 《电波科学学报》 EI CSCD 2001年第3期338-341,共4页 Chinese Journal of Radio Science
关键词 超视距雷达 通道失配 DBF副瓣电平 over the horizon radar channel mismatch digital beamforming
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参考文献4

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同被引文献34

  • 1冷红英,张扬,唐斌.阵列通道误差校正算法及DSP实现[J].电子科技大学学报,2004,33(5):511-514. 被引量:9
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