TY - JOUR
T1 - Spatial Smoothing PAST Algorithm for DOA Tracking Using Difference Coarray
AU - Zheng, Zhi
AU - Huang, Yixiao
AU - Wang, Wen-Qin
AU - So, Hing Cheung
PY - 2019/11
Y1 - 2019/11
N2 - In this letter, we devise a subspace updating algorithm for tracking directions-of-arrival (DOAs) using the difference coarray of a sparse array. Our solution is based on the projection approximation subspace tracking (PAST) framework, where we design new cost function and iterative process via spatial smoothing of the difference coarray output signal. Since the proposed spatial smoothing PAST (SS-PAST) algorithm exploits the aperture of the difference coarray, it attains higher DOA tracking accuracy than the conventional PAST method operating in a uniform linear array. Simulation results demonstrate the effectiveness of the SS-PAST algorithm.
AB - In this letter, we devise a subspace updating algorithm for tracking directions-of-arrival (DOAs) using the difference coarray of a sparse array. Our solution is based on the projection approximation subspace tracking (PAST) framework, where we design new cost function and iterative process via spatial smoothing of the difference coarray output signal. Since the proposed spatial smoothing PAST (SS-PAST) algorithm exploits the aperture of the difference coarray, it attains higher DOA tracking accuracy than the conventional PAST method operating in a uniform linear array. Simulation results demonstrate the effectiveness of the SS-PAST algorithm.
KW - difference coarray
KW - DOA tracking
KW - PAST
KW - SS-PAST
KW - subspace tracking
UR - http://www.scopus.com/inward/record.url?scp=85077748750&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85077748750&origin=recordpage
U2 - 10.1109/LSP.2019.2942146
DO - 10.1109/LSP.2019.2942146
M3 - RGC 21 - Publication in refereed journal
SN - 1070-9908
VL - 26
SP - 1623
EP - 1627
JO - IEEE Signal Processing Letters
JF - IEEE Signal Processing Letters
IS - 11
M1 - 8844823
ER -