航空学报 > 2006, Vol. 27 Issue (5): 917-921

宽带信号去斜脉冲压缩处理方法的研究

万永伦, 姒强, 吕幼新, 王洪, 汪学刚   

  1. 电子科技大学 电子工程学院, 四川 成都 610054
  • 收稿日期:2005-05-23 修回日期:2005-12-29 出版日期:2006-10-25 发布日期:2006-10-25

Study of Dechirp Pulse Compression Processing Method for Wideband Signals

WAN Yong-lun, SI Qiang, LU You-xin, WANG Hong, WANG Xue-gang   

  1. College of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China
  • Received:2005-05-23 Revised:2005-12-29 Online:2006-10-25 Published:2006-10-25

摘要: 宽带信号广泛应用于雷达、导航和卫星通讯等领域。宽带信号的传统接收处理方法主要是采用匹配滤波或子带分割技术。本文用去斜脉冲压缩处理方法处理宽带信号,给出了具体的实现结构和改进措施,分析了如何选择系统的信号采样频率,同时还给出了脉压波形的仿真结果及性能分析。实验表明:对中心频率为9.5GHz、带宽1.3GHz、脉冲宽度30μs的宽带线性调频信号,采用该方法处理只需90MHz采样数据率,大大降低了数据采集的难度。

关键词: 去斜率处理, 线性调频, 脉冲压缩, 主副比, 信噪比

Abstract: Wideband signals are widely used in radar, navigation, satellite communications and so on. The matched filtering or multi-subband method is generally adopted in the processing wideband signals. In this paper dechirp pulse compression processing technique is presented. Realization structure and improved measures are developed. How to select the sampling frequency is analyzed. At the same time the simulation results and performance analysis of pulse compression waveform are given. The simulation results show that the wideband linear frequency modulated (LFM) signal with 9.5 GHz center frequency, 1.3 GHz bandwidth and 30μs pulse width can be processed under 90 MHz sampling frequency by means of the method. The method decreases the difficulty with the data collection in the system.

Key words: dechirp processing, LFM, pulse compression, RMS, SNR

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