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
CN113259291AActive Publication Date: 2021-08-13HARBIN ENG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HARBIN ENG UNIV
Publication Date
2021-08-13

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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.
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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...

Claims

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