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A Phase Matching Method for Sine Signal Frequency Estimation

A technique for frequency estimation, sinusoidal signals, used in the field of signal processing

Inactive Publication Date: 2017-05-03
LOGISTICAL ENGINEERING UNIVERSITY OF PLA
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0014] The purpose of the present invention is to propose a frequency estimation method with high precision, wide application range, small calculation amount and good anti-noise performance, which is suitable for sinusoidal signal frequency estimation, solves the main problems existing in the existing information fusion method, and expands its Application range

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  • A Phase Matching Method for Sine Signal Frequency Estimation
  • A Phase Matching Method for Sine Signal Frequency Estimation
  • A Phase Matching Method for Sine Signal Frequency Estimation

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Experimental program
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specific Embodiment approach

[0062] Step 1: Use Calculate the autocorrelation sequence u of the segmented signal of the same frequency signal m , to eliminate the impact of different initial phases on the fusion of multi-segment signal information.

[0063] Step Two: Use For the autocorrelation sequence u m Perform time-domain average processing to obtain the time-domain average signal sequence λ, and improve the signal-to-noise ratio of the signal.

[0064] Step 3: Use the following formula to obtain a rough estimate of the signal frequency ω 1 ,

[0065]

[0066] Step 4: According to the characteristics of the time-domain average signal sequence λ and the rough estimation value ω of the frequency 1 Generate zero initial phase sine sequence {cos(kω 1 )}, {sin(kω 1 )}, into the following formula to obtain the signal frequency estimate

[0067] .

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Abstract

The invention relates to the field of signal processing, in particular to a phase matching method for sinusoidal signal frequency estimation. The method is suitable for the sinusoidal signal frequency estimation. The phase matching method includes the following steps that firstly, linear prediction performance of a sinusoidal signal and an autocorrelation sequence of an autocorrelation calculation same-frequency signal are used for eliminating influences on information fusion of the sinusoidal signal by different initial phases; then, time domain averaging is performed on the autocorrelation sequence, the signal-to-noise ratio of the signal is increased, and advantages are created for improving the precision of signal frequency estimation; finally, according to characteristics of the autocorrelation sequence, a zero initial phase sinusoidal sequence is generated, correlation coefficients of the two sequences are used for constructing an error function, and the error function is minimized to obtain a signal frequency estimation value. The method for sinusoidal signal frequency estimation is easy to implement, good in anti-noise performance and high in precision, dependency on the initial phases in the process of information fusion of multi-section signals is eliminated, and the precision of signal frequency estimation is improved.

Description

technical field [0001] The invention relates to the field of signal processing, in particular to a method for frequency estimation of sinusoidal signals. Background technique [0002] The frequency estimation of sinusoidal signal is to detect the frequency value of the signal from the sampling signal containing noise, which is one of the most practical techniques in modern signal processing. The frequency estimation of the sinusoidal signal is mainly to obtain the frequency estimation value of the signal through time domain transformation or spectrum analysis. With the development of science and technology, the frequency estimation of sinusoidal signals is widely used in radar, sonar, speech, image analysis, biomedicine and communication and other fields, which has important research significance and application value. [0003] Frequency estimation methods are divided into single-segment signal analysis method and multi-segment signal fusion method according to the signal c...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R23/02
Inventor 涂亚庆沈艳林
Owner LOGISTICAL ENGINEERING UNIVERSITY OF PLA