TY - GEN
T1 - DOA estimation for low angle targets using time reversal in frequency domain model
AU - Zeng, Xiaolu
AU - Chen, Baixiao
AU - Yang, Minglei
N1 - Publisher Copyright:
© 2018 IEEE.
PY - 2018/6/8
Y1 - 2018/6/8
N2 - Multipath distortion has been a challenge problem for low angle target localization problem using very high frequency (VHF) radar. In particular, under complex terrain, part of the multipath lies in the same beamwidth of the direct path signal, which makes it difficult to be distinguished in the spatial, temporal and Doppler domains. This paper uses time reversal (TR) technique to adjust the transmitting signal waveform by exploring the channel information contained in multipath clutters. According to TR principle, this specially designed signal can refocus at the original target position, which not only mitigates the multipath distortion but also equally increases the signal-to-noise ratio (SNR) of the TR receiving signal. Next, we analyzes the independence between the noise subspace and the sampling frequency bin in our TR wideband signal model. A novel direction of arrival (DOA) estimation method is then investigated in frequency domain. Compared with conventional methods, its superiority in DOA estimation accuracy for low angle targets is validated by numerical simulations.
AB - Multipath distortion has been a challenge problem for low angle target localization problem using very high frequency (VHF) radar. In particular, under complex terrain, part of the multipath lies in the same beamwidth of the direct path signal, which makes it difficult to be distinguished in the spatial, temporal and Doppler domains. This paper uses time reversal (TR) technique to adjust the transmitting signal waveform by exploring the channel information contained in multipath clutters. According to TR principle, this specially designed signal can refocus at the original target position, which not only mitigates the multipath distortion but also equally increases the signal-to-noise ratio (SNR) of the TR receiving signal. Next, we analyzes the independence between the noise subspace and the sampling frequency bin in our TR wideband signal model. A novel direction of arrival (DOA) estimation method is then investigated in frequency domain. Compared with conventional methods, its superiority in DOA estimation accuracy for low angle targets is validated by numerical simulations.
UR - https://www.scopus.com/pages/publications/85049948491
U2 - 10.1109/RADAR.2018.8378755
DO - 10.1109/RADAR.2018.8378755
M3 - Conference contribution
AN - SCOPUS:85049948491
T3 - 2018 IEEE Radar Conference, RadarConf 2018
SP - 1323
EP - 1327
BT - 2018 IEEE Radar Conference, RadarConf 2018
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2018 IEEE Radar Conference, RadarConf 2018
Y2 - 23 April 2018 through 27 April 2018
ER -