| 宽带线性调频信号产主技术研究 |
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| 引用本文： | 常文革,祝明波,梁甸农.宽带线性调频信号产主技术研究[J].信号处理,2002(2). |
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| 作者姓名： | 常文革 祝明波 梁甸农 |
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| 作者单位： | 国防科技大学电子科学与工程学院 长沙410073
(常文革，祝明波)，国防科技大学电子科学与工程学院 长沙410073(梁甸农) |
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| 摘 要： | 本文介绍了采用数字基带产生结合倍频链扩展带宽的方法设计与实现了大带宽线性调频信号产生系统。详细分析研究了实现系统的三项关键技术，给出并分析了相应环节的输出信号。对系统进行了预失真补偿处理，成功实现了ＶＨＦ／ＵＨＦ波段、带宽达３００ＭＨｚ线性调频信号的产生。经脉冲压缩处理，主瓣旁瓣比（ＰＳ１Ｒ）在－３７ｄＢ以下。
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| 关 键 词： | 线性调频信号 数字基带 正交调制 倍频链 预失真补偿 |
The Research on Generation of Wideband LFM Waveforms |
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| Chang Wenge,Zhu Mingbo,Liang Diannong.The Research on Generation of Wideband LFM Waveforms[J].Signal Processing,2002(2). |
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| Authors: | Chang Wenge Zhu Mingbo Liang Diannong |
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| Abstract: | The implementation technique for generation of widwband LFM waveforms is described in the paper. The key techniques, including the technique of generating the widwband digital baseband signal, the technique of wideband signal quadrature modulation, the technique of implementing wideband signal frequence-multiplier and the technique of digital pre-distortion, are discussed in detail. The VHF/UHF LFM signal with 300MHz bandwith is produced. With pulse compression the peak-to-sidelobe-ratio is -37dB below. |
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| Keywords: | LFM Digital baseband signal Quadrature modulation Frequence-multiplier Pre-distortion |
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