Design of Digital Down Converter of Mini SAR

Wang Hong-xian; Li Gang; Xing Meng-dao; Zhang Shou-hong

doi:10.3724/SP.J.1146.2008.01770

Volume 32 Issue 2

Aug. 2010

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Shao Fei, Wu Chun, Wang Li-feng. Research on Cross-layer Congestion Control Strategy Based on Multi-agent Reinforcement Learning in Ad hoc Network[J]. Journal of Electronics & Information Technology, 2010, 32(6): 1520-1524. doi: 10.3724/SP.J.1146.2009.01092

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Wang Hong-xian, Li Gang, Xing Meng-dao, Zhang Shou-hong. Design of Digital Down Converter of Mini SAR[J]. Journal of Electronics & Information Technology, 2010, 32(2): 485-489. doi: 10.3724/SP.J.1146.2008.01770

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Design of Digital Down Converter of Mini SAR

doi: 10.3724/SP.J.1146.2008.01770

Received Date: 2008-12-24
Rev Recd Date: 2009-11-10
Publish Date: 2010-02-19

Abstract

Abstract

In the designation of the real-time imaging machine of Mini SAR, the radar return signal is sampled in the intermediate frequency, then Digital Down Converter(DDC) is used to realize quadrature demodulate, which can reduce system complexity and improve radars performance. The difficulty in the design of the DDC of Mini SAR is firstly given in this paper, i.e. the sampling frequency is as high as 2Gsps and the bandwidth is 900MHz, which leads large difficulty in real-time processing. The optimal architecture of DDC based on real design parameters is given in the next, with the emphasis on the difference of the parallel FIR filter and fast FIR filter. Then the implementation of the DDC module using parallel processing with optimized structure in FPGA is given, the resource usage, running speed and quantity noise influence are given. Finally, the result of Mini SAR is given, which confirms the validity of the design.

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References(1)

References

苏涛, 何学辉, 吕林夏. 实时信号处理系统设计. 西安: 西安电子科技大学出版社, 2006: 41-42.[2]Su Tao.[J].He Xue-hui, and Lv Lin-xia. Real-time Signal Processing System Design. Xian: Xidian University Press.2006,:-[3]李早社, 禹卫东. 星载SAR实时成像处理器预处理器的FPGA实现. 现代雷达, 2007, 29(2): 38-40.Li Zao-she and Yu Wei-dong. FPGA implementation of preprocessor for spaceborne SAR imaging processor. Modern Radar, 2007, 29(2): 38-40.[4]Fudge J, Legako M, and Sehreiner C. An approach to efficient wideband digital down conversion. Proc IC SPAT, Toronto, 1998: 713-717.[5]杨明磊, 陈伯孝, 张守宏. 宽带信号的中频正交采样. 现代雷达, 2007, 29(3): 47-51.Yang Ming-lei, Chen Bo-xiao, and Zhang Shou-hong. Quadrature sampling of wideband IF signal. Modern Radar, 2007, 29(3): 47-51.[6]张嵘, 肖先赐. 任意中频带通信号多相数字下变频方法[J].电子与信息学报.2003, 25(9):1285-1289浏览Zhang Rong and Xiao Xian-ci. Polyphase based digital down conversion of random IF signal. Journal of Electronics and Information Technology, 2003, 25(9): 1285-1289.[7]李冰, 葛临东, 郑瑾. 一种改进的宽带数字下变频高效结构[J].电子与信息学报.2007, 29(8):1891-1894浏览Li Bing, Ge Lin-dong, and Zheng Jin. An improved efficient architecture for wideband digital down conversion. Journal of Electronics and Information Technology, 2007, 29(8): 1891-1894.[8]Stephan B, Thomas D, and Peter R. A real-time time-domain EMI measurement system for full-compliance measurements according to CISPR 16-1-1[J].IEEE Transactions on Electromagnetic Compatibility.2008, 50(2):259-267[9]Uwe Meyer-Baese. Digital Signal Processing with Field Programmable Aate Arrays (third edition). Springer, 2007: 165-207.

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