Combined Doppler estimation method based on dynamic adjustment of sampling rate

A technology of Doppler estimation and dynamic adjustment, which is applied in the direction of carrier adjustment, multi-frequency code system, modulated carrier system, etc., can solve the problems such as the decrease of estimation accuracy and the influence of underwater acoustic communication performance, and achieve less computation and better estimation results. Accurate and reliable, achieve simple results
CN112087407AActive Publication Date: 2020-12-15FUJIAN XINGHAI COMM TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
FUJIAN XINGHAI COMM TECH
Publication Date
2020-12-15

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Abstract

The invention discloses a combined Doppler estimation method based on dynamic adjustment of a sampling rate. The combined Doppler estimation method comprises the steps of S1, adding a starting frame of an LFM+CW signal to carry out carrier capture and coarse synchronization; and S2, carrying out fine synchronization by measuring the peak value offset of the LFM signal. The step S1 comprises the steps of after a first LFM signal is identified by an LFM pulse compression peak value obtained by matched filtering, achieving capture and coarse synchronization of a single carrier through a COSTAS ring to obtain an initial Doppler estimation result, and adjusting the sampling rate for the first time. Compared with the prior art, the method has the advantages of being accurate and reliable in estimation result, small in calculation amount, easy to implement, high in real-time performance, easy to implement and the like.
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Description

[0001] This case is a divisional application based on the patent application with the application number 201810025927.9, the application date is January 11, 2018, and the title is "A Combined Doppler Estimation Method Applicable to Underwater Acoustic Communication System". technical field

[0002] The invention relates to the technical field of underwater acoustic communication, in particular to a combined Doppler estimation method based on dynamic adjustment of sampling rate. Background technique

[0003] With the frequent development of oceans, the underwater acoustic communication system has great application value not only in the military field, but also in the civilian field. Such as marine water quality monitoring, marine disaster early warning, resource exploration, etc. The underwater acoustic communication system based on multiple-input multiple-output Orthogonal Frequency Division Multiplexing (OFDM) has become an important development direction in the field of un...

Claims

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