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Parameter Estimation of Sinusoidal Signal under Low SNR

机译:低信噪比下正弦信号的参数估计

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摘要

Based on the known frequency, the amplitude and initial phase of sinusoidal signal can be estimated by using the proposed cross-correlation function in this paper. And the problem of signal loss on phase when using autocorrelation function to estimate amplitude is solved. By using the superposition algorithm, the SNR of the observed signal can be improved effectively and the signal energy would not lose, this improves the accuracy of the estimation. Simulation results prove that amplitude and initial phase can be estimated accurately at low SNR by using the cross-correlation function which based on the superposition algorithm.
机译:在已知频率的基础上,可以使用本文提出的互相关函数来估计正弦信号的幅度和初始相位。解决了使用自相关函数估计幅度时相位信号丢失的问题。通过使用叠加算法,可以有效提高观测信号的信噪比,并且不会损失信号能量,提高了估计的准确性。仿真结果表明,利用基于叠加算法的互相关函数,可以在低信噪比下准确估计幅度和初始相位。

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