| 超宽带LFM信号数字产生系统的误差分析 |
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| 引用本文： | 胡仕兵,汪学刚,姒强,唐斌.超宽带LFM信号数字产生系统的误差分析[J].电子科技大学学报（自然科学版）,2008,37(2):210-213. |
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| 作者姓名： | 胡仕兵 汪学刚 姒强 唐斌 |
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| 作者单位： | 1.电子科技大学电子工程学院 成都 610054 |
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| 摘 要： | 对线性调频(LFM)信号的三种主要数字产生方法进行分析,提出一种基于波形存储直读法的超宽带线性调频脉冲压缩信号数字产生系统方案。探讨了系统数字基带中的幅度量化位数和采样频率、正交调制器的非理想性、倍频电路中的误差因素和中频LFM信号有时域畸变时对输出信号性能的影响,为超宽带系统工程实现时参数选择、性能评估和性能优化提供重要的理论依据和经验参考。
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| 关 键 词： | 误差分析 倍频器 脉冲压缩 正交调制器 超宽带线性调频信号 波形存储直读法 |
| 收稿时间： | 2006-03-15 |
| 修稿时间： | 2006年3月15日 |
Errors Analysis of the Digital Generation System for Ultra Wide-Band LFM Signals |
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| HU Shi-bing,WANG Xue-gang,SI Qiang,TANG Bin.Errors Analysis of the Digital Generation System for Ultra Wide-Band LFM Signals[J].Journal of University of Electronic Science and Technology of China,2008,37(2):210-213. |
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| Authors: | HU Shi-bing WANG Xue-gang SI Qiang TANG Bin |
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| Affiliation: | 1.School of Electronic Engineering,University of Electronic Seience and Technology of China Chengdu 610054 |
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| Abstract: | Three main digital methods for linear frequency modulated (LFM) waveform generation are compared and analyzed. On the basis of the waveform storage method, a digital generation system scheme for ultra wide-band LFM pulse compression signals is proposed in this paper. The performances of the digital system is investigated in detail including the effects of amplitude quantization bits and the sampling frequency at digital base-band, the non-idealization of the quadrature modulator, spurs involved in the frequency multiplier, and the distortion of intermediate frequency LFM signals in time domain on the performance of output signals. The results are finally proved by computer simulations and therefore provide important theoretical bases and experiential references for parameters selection, performance evaluation, and performance optimization of ultra wide-band systems. |
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