High Signal to Noise Ratio and High Resolution Wide Swath Imaging of MIMO-SAR Based on Almouti Space-Time Encoding

ZENG Xiang-neng; BAI Jie; HAO Ming-lei; ZHANG Yong-shun

doi:10.3969/j.issn.0372-2112.2014.06.023

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High Signal to Noise Ratio and High Resolution Wide Swath Imaging of MIMO-SAR Based on Almouti Space-Time Encoding

更新时间：2025-07-16

- High Signal to Noise Ratio and High Resolution Wide Swath Imaging of MIMO-SAR Based on Almouti Space-Time Encoding
- Acta Electronica Sinica Vol. 42, Issue 6, Pages: 1186-1193(2014)
- 作者机构：
  
  1. 空军装备研究院航空气象防化研究所,北京,100085
  2. 空军工程大学导弹学院,陕西,西安,710051
  3. 空军装备研究院航空气象防化研究所,北京,100085
  4. 空军工程大学导弹学院,陕西,西安,710051
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China (No.60736009, No.60901071)
- DOI：10.3969/j.issn.0372-2112.2014.06.023
  CLC： TN957
- Published：2014
- 稿件说明：
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ZENG Xiang-neng, BAI Jie, HAO Ming-lei, et al. High Signal to Noise Ratio and High Resolution Wide Swath Imaging of MIMO-SAR Based on Almouti Space-Time Encoding[J]. Acta Electronica Sinica, 2014, 42(6): 1186-1193.
DOI：

ZENG Xiang-neng, BAI Jie, HAO Ming-lei, et al. High Signal to Noise Ratio and High Resolution Wide Swath Imaging of MIMO-SAR Based on Almouti Space-Time Encoding[J]. Acta Electronica Sinica, 2014, 42(6): 1186-1193. DOI： 10.3969/j.issn.0372-2112.2014.06.023.

摘要

提出了一种基于Alamouti空时编码的方位-慢时间波形编码方案.系统沿方位向分两个子孔径按Alamouti编码矩阵对正交波形作脉间编码发射，接收端全阵列分子孔径接收，通过对回波信号作方位多普勒解模糊，再解码处理Alamouti编码组内相邻两个脉冲重复间隔（PRI）的回波信号，实现了正交子波形的彻底分离，改善了回波信号的信噪比，可实现高信噪比下高分辨宽测绘带成像.系统结构简单，孔径资源利用率高，且具有同时多模式工作潜力.仿真分析验证了系统信号处理方法的正确性.

Abstract

A new mode named azimuth-slow time waveform coding based on Alamouti space-time coding is presented.In azimuth

the total antenna array is divided into two sub-apertures for transmitting orthogonal waveforms that encoded by Alamouti coding matrix.In receiver

the total antenna array is divided into multiple sub-apertures forming multiple receive phase centers

which can be used for azimuth doppler ambiguity deduction

then the decoding of neighbor pulses can separate the orthogonal sub-waveforms thoroughly.This new method can enhance the echoes' SNR obviously and also realize high resolution wide swath imaging.The proposed system is of terseness

the aperture is fully explored

the SNR of echoes is improved

and the potential of multiple working modes simultaneously

etc.The simulation Results verify the system signal processing method.

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