|Table of Contents|

Estimation Precision Improvement Method of Velocity Measurement for Doppler Radar

《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

Issue:
2009年04期
Page:
520-523
Research Field:
Publishing date:

Info

Title:
Estimation Precision Improvement Method of Velocity Measurement for Doppler Radar
Author(s):
CAI Zheng-yuCHEN Wen-wuXIE Ren-hong
School of Electronic Engineering and Optoelectronic Technology,NUST,Nanjing 210094,China
Keywords:
Doppler radar fast Fourier transform frequency estimation linear adjustment
PACS:
TN958
DOI:
-
Abstract:
According to the feature of exterior ballistic velocity measurement for continuous wave Doppler radar,in order to solve the problem that the frequency resolution and the sampling frequency may bring negative effects on the velocity measurement precision,frequency spectrum analysis based on fast Fourier transform is used.A linear adjustment method of frequency estimation is proposed according to the ascending or descending principle of target exterior trajectory.The method improves the measuring distance and precision and the anti-jamming ability of the system and avoids the appearance of continuously same velocity from inadequate frequency resolution.The frequency estimation precision is improved using the frequency spectrum phase information of adjacent continuous truncation of the signal.The simulation and practical result show that high frequency estimation precision can be obtained even at a low signal noise ratio.

References:

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Last Update: 2012-11-19