Carrier frequency estimation method and device

A technology of carrier frequency and frequency, which is applied in the field of carrier frequency estimation methods and devices, can solve the problems of inaccurate estimation of modulation signal carrier frequency, reduced accuracy of signal demodulation, poor communication quality, etc., to ensure communication quality, The effect of reducing carrier frequency and reducing complexity

Inactive Publication Date: 2019-05-10
IFLYTEK CO LTD
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Problems solved by technology

[0005] The embodiment of the present invention provides a method for estimating the carrier frequency to solve the problems in the prior art that the carrier frequency of the modulated signal cannot be accurately estimated, resulting in reduced accuracy of signal demodulation and poor communication quality.

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  • Carrier frequency estimation method and device
  • Carrier frequency estimation method and device
  • Carrier frequency estimation method and device

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Embodiment Construction

[0084] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0085] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0086] see figure 1 , which is a flow chart of a method for estimating carrier frequency provided by an embodiment of the present invention; the method is applied in non-cooperative digital communication, ...

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Abstract

The embodiment of the invention provides a carrier frequency estimation method and device. The estimation method comprises the following steps of: obtaining a to-be-estimated signal received by the demodulation end, and inputting the to-be-estimated signal into a Duffing vibration subsystem in a critical chaotic state to carry out step size iterative calculation to obtain an output phase track, and if the phase track is in a periodic intermittent chaotic state, calculating the carrier frequency of the to-be-estimated signal according to the step size in the periodic intermittent chaotic state.In the embodiment of the invention, in non-cooperative digital communication, the complexity of a carrier frequency estimation algorithm is reduced, accurate estimation of the carrier frequency of the signal to be estimated is realized, the accuracy of signal demodulation is improved, and the communication quality is ensured.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a carrier frequency estimation method and device. Background technique [0002] Most of the existing carrier frequency estimation methods are based on cyclostationary carrier frequency estimation methods, such as high-order cumulants and cyclic spectrum estimation methods. For example, in the carrier frequency estimation method based on cyclostationary, first, it is necessary to calculate the high-order autocorrelation of the signal (that is, the high-order moment), and then use the Wiener-Sinchin theorem to calculate the circular correlation according to the high-order autocorrelation of the signal The spectral function, and finally, the value of the carrier frequency is estimated based on the circular correlation spectral function and the conclusion that the carrier frequency has a non-zero value at the cycle. [0003] However, although the existing cycl...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/00
Inventor 蒋亮亮李清李胜才李冬冬
Owner IFLYTEK CO LTD
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