Estimation method based on underwater target speed

By using a combined signal of hyperbolic frequency tune plus single frequency pulse signal to estimate the underwater target motion velocity, using matching filtering and spectrum analysis technology, the problems of large calculation volume and poor real-time performance in the prior art are solved, and fast and accurate target speed estimation is achieved.

CN119644339APending Publication Date: 2025-03-18HAIYING ENTERPRISE GROUP
0 Cites 1 Cited by

Patent Information

Application Number
CN202411789327.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-06
Publication Date
2025-03-18

AI Technical Summary

Technical Problem

The prior art has a large amount of calculation and poor real-time performance in underwater target motion velocity estimation, making it difficult to quickly and accurately estimate the underwater target velocity.

Method used

A combined signal of hyperbolic frequency tune plus single frequency pulse signal is used to process the target echo signal through matching filtering, the single frequency echo signal part is extracted, and spectrum analysis is performed to estimate the Doppler offset, thereby deriving the radial velocity of the target.

Benefits of technology

The calculation process has been greatly optimized, the calculation amount has been reduced, the real-time and accuracy of the estimation have been improved, and the rapid and accurate estimation of the underwater target movement speed has been achieved.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention relates to an estimation method based on underwater target speed, the estimation method greatly optimizes the calculated amount of process steps under the condition of ensuring the accuracy of a result, and the estimation method comprises the following steps: transmitting a combined signal which is a hyperbolic frequency modulation and single-frequency pulse signal, and the frequency of the single-frequency pulse signal is not within the frequency range of the hyperbolic frequency modulation signal; only constructing a reference signal of the hyperbolic frequency modulation signal, performing matched filtering processing on a received target echo signal, and performing target detection according to a matching result; on the basis of obtaining the position of the target leading edge signal, extracting a part containing a single-frequency echo signal in the echo signal according to the pulse width of the transmitted pulse signal; the extracted signal part is subjected to spectral analysis to obtain Doppler shift, namely target speed derivation, and then the radial speed of the target is estimated. According to the estimation method disclosed by the invention, under the condition that the simulation signal-to-noise ratio is 0dB, the target radial speed is 3m / s to 10m / s, and the design targets of error range and real-time performance required by a final project are met.
Need to check novelty before this filing date? Find Prior Art