The Influence of Quadrature Demodulation Errors on Broadband Beamforming

LI Ning; TANG Jun; PENG Ying-ning

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The Influence of Quadrature Demodulation Errors on Broadband Beamforming

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- The Influence of Quadrature Demodulation Errors on Broadband Beamforming
- Acta Electronica Sinica Vol. 37, Issue 6, Pages: 1338-1342(2009)
- 作者机构：
  
  清华大学电子工程系,北京,100084
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN958.92
- Published：2009
- 稿件说明：
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LI Ning, TANG Jun, PENG Ying-ning. The Influence of Quadrature Demodulation Errors on Broadband Beamforming[J]. Acta Electronica Sinica, 2009, 37(6): 1338-1342.
DOI：

LI Ning, TANG Jun, PENG Ying-ning. The Influence of Quadrature Demodulation Errors on Broadband Beamforming[J]. Acta Electronica Sinica, 2009, 37(6): 1338-1342. DOI：

摘要

宽带相控阵雷达中解调误差的存在会对自适应宽带波束形成造成影响.论文以宽带信号和正交解调误差模型为基础

求解了时域和频域宽带波束形成中自相关矩阵的表达式.通过对自相关矩阵的分析论文指出

误差会引起干扰自由度增加、波束形成性能下降.在宽带波束形成中需要更多的空间自由度.

Abstract

The quadrature demodulation errors in broadband phased array radar will influence the performance of the broadband beamforming.Based on the broadband signal model and demodulation error model the covariance matrices of the time-domain and frequency-domain broadband beamforming in error case are derived.Through the analysis of the covariance matrix

it is found that the degrees of freedom of the interference will increase and the performance of beamforming will become worse.Consider the demodulation errors

more degrees of freedom should be provided to a real radar system.

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