TY - GEN
T1 - Broadband beamspace DOA estimation algorithms
AU - Yang, Yixin
AU - Wan, Chunru
AU - Sun, Chao
N1 - Publisher Copyright:
© 2003 MTS.
PY - 2003
Y1 - 2003
N2 - Two kinds of broadband beamspace high-resolution DOA estimation algorithms are studied in this paper. The first one is broadband beamspace coherent high-resolution processing method based on constant beamwidth beamformers. In this method, conventional narrowband beamspace high-resolution DOA estimation methods such as beamspace MUSIC can be applied to the output of constant beamwidth beamformers. Because of the fixed beamformers used in this method, its performance will be reduced when there exist strong interference signals outside the beam coverage region. To solve this problem, broadband incoherent high-resolution processing method based on subband beamformers is proposed in this paper. The broadband signals are divided into subbands via frequency decomposition. In each subband, we use MVDR beamformers to suppress the strong interference signals outside the beam coverage region. To overcome the beampattern distortion problem due to the inaccuracy estimation of the covariance matrix, diagonal loading is applied to the MVDR beamformers. Beamspace MUSIC is used to get the spatial spectrum of each subband. The final DOA estimates result from the incoherent combination of spatial spectrum of each subband. Simulation results are presented to show the performance of these two algorithms.
AB - Two kinds of broadband beamspace high-resolution DOA estimation algorithms are studied in this paper. The first one is broadband beamspace coherent high-resolution processing method based on constant beamwidth beamformers. In this method, conventional narrowband beamspace high-resolution DOA estimation methods such as beamspace MUSIC can be applied to the output of constant beamwidth beamformers. Because of the fixed beamformers used in this method, its performance will be reduced when there exist strong interference signals outside the beam coverage region. To solve this problem, broadband incoherent high-resolution processing method based on subband beamformers is proposed in this paper. The broadband signals are divided into subbands via frequency decomposition. In each subband, we use MVDR beamformers to suppress the strong interference signals outside the beam coverage region. To overcome the beampattern distortion problem due to the inaccuracy estimation of the covariance matrix, diagonal loading is applied to the MVDR beamformers. Beamspace MUSIC is used to get the spatial spectrum of each subband. The final DOA estimates result from the incoherent combination of spatial spectrum of each subband. Simulation results are presented to show the performance of these two algorithms.
UR - http://www.scopus.com/inward/record.url?scp=84945415103&partnerID=8YFLogxK
U2 - 10.1109/OCEANS.2003.178125
DO - 10.1109/OCEANS.2003.178125
M3 - 会议稿件
AN - SCOPUS:84945415103
T3 - Oceans 2003: Celebrating the Past... Teaming Toward the Future
SP - 1654
EP - 1660
BT - Oceans 2003
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - Oceans 2003 - Marine Technology Society, Institute of Electrical and Electronics Engineers Conference, MTS/IEEE
Y2 - 22 September 2003 through 26 September 2003
ER -