caa a22 4500 606205020 CHVBK 20210128101005.0 cr unu---uuuuu 210128e20150601xx s 000 0 eng 10.1007/s00034-014-9950-y doi (NATIONALLICENCE)springer-10.1007/s00034-014-9950-y LFM Signal Parameters Estimation Using Optimization Approach Initialized by Lipschitz Constant Assisted DIRECT Algorithm [Elektronische Daten] [Dan Ding, Naiping Cheng, Yurong Liao] In this paper, the widely used numerical optimization method for estimating linear frequency modulated signal parameters is modified. To this purpose, an improved Dividing RECTangles (DIRECT) algorithm, called the Lipschitz constant assisted DIRECT (L-DIRECT) algorithm, is proposed to substitute for the commonly used Grid Search method. The proposed global optimization algorithm can provide initial estimates for local optimization algorithms such as Newton and Simplex. Based on the classical DIRECT algorithm, the L-DIRECT algorithm eliminates hopeless areas, suspends unlikely areas, and concentrates on promising areas in search space, thus determining the range of attraction for local optimization algorithms with lower SNR thresholds or lessened computational burdens. The effect of the modification is validated by simulation results. Springer Science+Business Media New York, 2014 Linear frequency modulated signal nationallicence Parameter estimation nationallicence DIRECT algorithm nationallicence Global optimization nationallicence Local optimization nationallicence Ding Dan Department of Optical and Electronic equipment, Academy of Equipment, Beijing City, China aut Cheng Naiping Department of Optical and Electronic equipment, Academy of Equipment, Beijing City, China aut Liao Yurong Department of Optical and Electronic equipment, Academy of Equipment, Beijing City, China aut Circuits, Systems, and Signal Processing Springer US; http://www.springer-ny.com 34/6(2015-06-01), 2037-2051 0278-081X 34:6<2037 2015 34 34 https://doi.org/10.1007/s00034-014-9950-y text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00034-014-9950-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ding Dan Department of Optical and Electronic equipment, Academy of Equipment, Beijing City, China aut NATIONALLICENCE 700 1- Cheng Naiping Department of Optical and Electronic equipment, Academy of Equipment, Beijing City, China aut NATIONALLICENCE 700 1- Liao Yurong Department of Optical and Electronic equipment, Academy of Equipment, Beijing City, China aut NATIONALLICENCE 773 0- Circuits, Systems, and Signal Processing Springer US; http://www.springer-ny.com 34/6(2015-06-01), 2037-2051 0278-081X 34:6<2037 2015 34 34