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Phase compensation method realized by dynamic Doppler tracking of underwater sound continuous signal

A phase compensation and Doppler factor technology, applied in the field of underwater acoustic spread spectrum communication systems, can solve the problems of inaccurate information synchronization at the receiving end, inability to accurately obtain effective information, and low frequency band utilization, and achieve continuous Doppler estimation. Effect

Active Publication Date: 2021-08-13
HARBIN ENG UNIV
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Problems solved by technology

[0009] The purpose of the present invention is to solve the problems of inaccurate information synchronization at the receiving end, inaccurate acquisition of effective information, and low frequency band utilization in the communication process in the existing method of phase compensation using Doppler tracking. A Phase Compensation Method Realized by Dynamic Doppler Tracking of Acoustic Continuous Signal

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  • Phase compensation method realized by dynamic Doppler tracking of underwater sound continuous signal
  • Phase compensation method realized by dynamic Doppler tracking of underwater sound continuous signal
  • Phase compensation method realized by dynamic Doppler tracking of underwater sound continuous signal

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[0108] 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 only some, not all, embodiments of the present invention. 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.

[0109] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0110] see figure 1 and figure 2 Describe this embodiment, the phase compensation method that utilizes underwater acoustic continuous signal dynamic Doppler tracking to realize described in this embodiment, this method comprises the following steps:

[0111] Step 1. Perform signal synchronizatio...

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Abstract

The invention discloses a phase compensation method realized by dynamic Doppler tracking of underwater sound continuous signals, and belongs to the field of underwater wireless communication and signal processing thereof. The problems that according to an existing method for conducting phase compensation through Doppler tracking, information synchronization of a receiving end is not accurate, effective information cannot be accurately obtained, and the frequency band utilization rate is low in the communication process are solved. The method comprises the following steps: performing correlation processing on a received signal and a local complex passband reference signal to obtain a passband correlation signal; carrying out symbol-by-symbol Doppler estimation on the obtained passband correlation signal; wherein the Doppler estimation value is used for compensating phase deviation of a received signal and generating a new local complex passband reference signal as a reference signal of a next processing unit so as to compensate amplitude attenuation introduced by dynamic Doppler. The method is mainly suitable for an underwater acoustic spread spectrum communication system in a dynamic Doppler scene.

Description

technical field [0001] The invention belongs to the field of underwater wireless communication and signal processing thereof, and is particularly suitable for an underwater acoustic spread spectrum communication system under a dynamic Doppler scene. Background technique [0002] Doppler tracking and phase compensation is a classic subject in the research of underwater wireless communication technology. Due to its good autocorrelation and cross-correlation characteristics, spread spectrum signals have good anti-multipath interference, support simultaneous transmission of multiple users, and can directly combine space-time diversity gains by using differential modulation. It has been widely used Applied to underwater communication and networking systems. The use of differential modulation (DPSK) can effectively combine space-time diversity gains, but it also introduces a loss in differential detection performance. [0003] Single-carrier signals and multi-carrier signals hav...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/00H04B13/02H04B11/00H04B1/69
CPCH04L27/0014H04B13/02H04B11/00H04B1/69H04L2027/0026
Inventor 孙大军洪小平崔宏宇张居成张殿伦
Owner HARBIN ENG UNIV
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