TY - GEN
T1 - Generalized Design Approach for Fourth-Order Difference Co-Array
AU - Ren, Shiwei
AU - Zhu, Tao
AU - Liu, Jianyan
N1 - Publisher Copyright:
© 2018 IEEE.
PY - 2018/12/3
Y1 - 2018/12/3
N2 - This paper presents a generalized approach to design fourth-order non-uniform linear arrays (NLAs) by combining any two second-order NLAs (e.g. co-prime array (CA), nested array (NA)). This new-formed NLA could exactly achieve a large hole-free range in its fourth-order difference co-array. By establishing the relationship between the second-order NLAs and the fourth-order NLAs, closed-form expressions for the physical sensor locations and the corresponding virtual sensor configurations are specifically derived. Compared to the prior proposed structure, the new structure could effectively increase the virtual aperture, therefore, having the ability to detect more sources. By considering direction of arrival (DOA) estimation for quasi-stationary (QS) signals, numerical simulation results validate the effectiveness of the proposed array structure.
AB - This paper presents a generalized approach to design fourth-order non-uniform linear arrays (NLAs) by combining any two second-order NLAs (e.g. co-prime array (CA), nested array (NA)). This new-formed NLA could exactly achieve a large hole-free range in its fourth-order difference co-array. By establishing the relationship between the second-order NLAs and the fourth-order NLAs, closed-form expressions for the physical sensor locations and the corresponding virtual sensor configurations are specifically derived. Compared to the prior proposed structure, the new structure could effectively increase the virtual aperture, therefore, having the ability to detect more sources. By considering direction of arrival (DOA) estimation for quasi-stationary (QS) signals, numerical simulation results validate the effectiveness of the proposed array structure.
KW - DOA estimation
KW - difference co-array of the sum co-array
KW - fourth-order co-array
KW - non-uniform linear arrays
KW - quasi-stationary signals
UR - http://www.scopus.com/inward/record.url?scp=85060128081&partnerID=8YFLogxK
U2 - 10.1109/RADAR.2018.8557325
DO - 10.1109/RADAR.2018.8557325
M3 - Conference contribution
AN - SCOPUS:85060128081
T3 - 2018 International Conference on Radar, RADAR 2018
BT - 2018 International Conference on Radar, RADAR 2018
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2018 International Conference on Radar, RADAR 2018
Y2 - 27 August 2018 through 31 August 2018
ER -