| 一种基于四阶累积量的约束自适应多径时延估计 |
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| 引用本文： | 熊秋犇,王江,杨景曙.一种基于四阶累积量的约束自适应多径时延估计[J].电子信息对抗技术,2011,26(3):10-15. |
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| 作者姓名： | 熊秋犇 王江 杨景曙 |
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| 作者单位： | 解放军92773部队;电子工程学院; |
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| 摘 要： | 在存在多径信号和空间相关性未知的背景高斯噪声情况下,不考虑多径信号传输的传统时延估计方法的性能会受到影响,甚至恶化。针对此问题,提出了一种基于四阶累积量的约束自适应多径时延估计算法,并对该算法的多径时延估计性能进行了收敛性能分析。该算法能够有效抑制空间相关性未知噪声的影响,在低信噪比的情况下能够直接、准确地进行自适应多径时延估计,克服了传统算法不能直接估计非整数倍采样间隔时延的缺点。计算机仿真试验验证了新算法的有效性。
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| 关 键 词： | 自适应 多径时延估计 四阶累积量 |
A Constrained Adaptive Multipath Time Delay Estimator Based on Fourth-Order Cumulants |
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| Authors: | XIONG Qiu-ben WANG Jiang YANG Jing-shu |
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| Affiliation: | XIONG Qiu-ben1,WANG Jiang2,YANG Jing-shu2(1.Unit 92773 of PLA,Wenzhou 325807,China,2.Electronic Engineering Institute,Hefei 230037,China) |
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| Abstract: | When there are multipath signals and spatial unknown correlated Gaussian noises,the behaviors of the traditional methods for time delay estimation without regard to multipath signals are declined,even deteriorated.Therefore,a constrained adaptive multipath time delay estimator based on fourth-order cumulants is proposed,and the convergence behaviors of multipath time delay estimation of this method are derived.This approach can suppress spatial unknown correlated Gaussian noises effectively,and it also can ... |
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| Keywords: | adaptive multipath time delay estimation fourth-order cumulants |
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