DocumentCode :
508438
Title :
A comparison of wideband beamformers in coherent situations
Author :
Tian Ji-Lu ; Zhi Ming-He
Author_Institution :
Univ. of Electron. Sci. & Technol. of China, Chengdu
fYear :
2009
fDate :
20-22 April 2009
Firstpage :
1
Lastpage :
4
Abstract :
In this paper, we compare the performance of two classes of adaptive beamformers for wideband and coherent signals. It is well known that when the desired signal and interferences are partially or completely correlated, performance of conventional beamformer degrades severely. Therefore, spatial smoothing method and frequency focusing method have been proposed to tackle coherent sources. In this paper, we first discuss a frequency focusing method which is based on time-domain and can be applied to real time systems. And then, a new wideband beamformer was proposed by introducing spatial smoothing method into Frost beamformer. Result of simulations shows that the new beamformer has better frequency response than the time-domain based frequency focusing beamformer.
Keywords :
array signal processing; time-frequency analysis; Frost beamformer; adaptive beamformers; frequency focusing method; time-domain based frequency focusing beamformer; wideband beamformers; adaptive array; beamforming; coherent signal; wideband;
fLanguage :
English
Publisher :
iet
Conference_Titel :
Radar Conference, 2009 IET International
Conference_Location :
Guilin
ISSN :
0537-9989
Print_ISBN :
978-1-84919-010-7
Type :
conf
Filename :
5367299
Link To Document :
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