Ionospheric clutter analysis and suppression in a distributed MIMO-HFSWR system

Author

Xu Xing-an ; Wu Xiong-bin ; Pi Xiao-shan ; Lu Xiong-jiu

Author_Institution

Sch. of Electron. & Inf., Wuhan Univ., Wuhan, China

fYear

2014

fDate

7-10 April 2014

Firstpage

1

Lastpage

5

Abstract

In distributed MIMO (multiple-input-multiple-output)-HFSWR (high frequency surface wave radar), multiple detection modes are introduced to enrich the detection information, however making ionospheric clutter more complicated. In this paper, a distributed MIMO-HFSWR system involving three monostatic radars is introduced. Sea echo and ionospheric clutters from different paths are received simultaneously by MIMO system. Characteristic of ionospheric clutter in range domain and Doppler domain are analyzed with measured data. It is discovered that the correlation of ionospheric clutters from different paths is higher than of sea echoes. Based on this, a novel method for clutter suppression is proposed via adaptive filter using clutters from different paths as secondary data. Experimental results show that the analysis and processing method are feasible and effective.

Keywords

Doppler radar; MIMO radar; correlation methods; echo suppression; ionospheric electromagnetic wave propagation; radar clutter; radar detection; radar signal processing; Doppler domain; adaptive filter; clutter suppression; distributed MIMO-HFSWR system; high frequency surface wave radar; information detection; ionospheric clutter correlation; monostatic radar; multiple input multiple output system; range domain; sea echo; secondary data; Clutter; Correlation; Doppler effect; MIMO; Radar clutter; Sea surface; HFSWR; MIMO; adaptive filter; correlation; ionospheric clutter;

fLanguage

English

Publisher

ieee

Conference_Titel

OCEANS 2014 - TAIPEI

Conference_Location

Taipei

Print_ISBN

978-1-4799-3645-8

Type

conf

DOI

10.1109/OCEANS-TAIPEI.2014.6964588

Filename

6964588