通道幅相不一致对SFAP性能影响的分析
发布时间：2019-06-02 09:35
【摘要】：空频自适应处理(SFAP)是全球导航卫星系统(GNSS)阵列抗干扰接收机中常用的算法,而工程实践中,阵列的幅相不一致性是必须考虑的非理想因素。以往文献分析阵列各通道幅相不一致性的影响多集中于波束形成和波达角(DOA)估计的精度上。该文在SFAP算法框架下,结合已知的各通道传递函数,计算观测数据协方差矩阵和最优权矢量,进而可获得SFAP抗干扰性能损失程度的定量结果。计算和仿真结果表明:通道幅相不一致性可严重影响SFAP抗干扰性能。该方法在工程上可用于确定射频通道幅相一致性指标要求。
[Abstract]:Space-frequency adaptive processing (SFAP) is a common algorithm in (GNSS) array anti-interference receiver of GNSS, and in engineering practice, the amplitude and phase inconsistency of the array is a non-ideal factor that must be considered. In the past, the influence of amplitude and phase inconsistency in each channel of the array was mainly focused on the accuracy of beamforming and arrival angle (DOA) estimation. In this paper, under the framework of SFAP algorithm, combined with the known transfer functions of each channel, the covariance matrix and the optimal weight vector of the observed data are calculated, and the quantitative results of the anti-interference performance loss of SFAP can be obtained. The calculation and simulation results show that the amplitude and phase inconsistency of the channel can seriously affect the anti-interference performance of SFAP. This method can be used to determine the amplitude and phase consistency index of RF channel in engineering.
【作者单位】： 清华大学电子工程系;中国运载火箭技术研究院研究发展中心;
【基金】：国家自然科学基金重点项目(U133203)
【分类号】：TN965.5
本文编号：2490994
[Abstract]:Space-frequency adaptive processing (SFAP) is a common algorithm in (GNSS) array anti-interference receiver of GNSS, and in engineering practice, the amplitude and phase inconsistency of the array is a non-ideal factor that must be considered. In the past, the influence of amplitude and phase inconsistency in each channel of the array was mainly focused on the accuracy of beamforming and arrival angle (DOA) estimation. In this paper, under the framework of SFAP algorithm, combined with the known transfer functions of each channel, the covariance matrix and the optimal weight vector of the observed data are calculated, and the quantitative results of the anti-interference performance loss of SFAP can be obtained. The calculation and simulation results show that the amplitude and phase inconsistency of the channel can seriously affect the anti-interference performance of SFAP. This method can be used to determine the amplitude and phase consistency index of RF channel in engineering.
【作者单位】： 清华大学电子工程系;中国运载火箭技术研究院研究发展中心;
【基金】：国家自然科学基金重点项目(U133203)
【分类号】：TN965.5
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，本文编号：2490994
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