Transmit Subaperturing for Range and Angle Estimation in Frequency Diverse Array Radar

Different from conventional phased-array, which provides only angle-dependent beampattern, frequency diverse array (FDA) employs a small frequency increment across the antenna elements and results in a range-angle-dependent beampattern. This beampattern offers a potential to localize the targets in...

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Vydané v:	IEEE transactions on signal processing Ročník 62; číslo 8; s. 2000 - 2011
Hlavní autori:	Wen-Qin Wang, So, H. C.
Médium:	Journal Article
Jazyk:	English
Vydavateľské údaje:	New York, NY IEEE 01.04.2014 Institute of Electrical and Electronics Engineers The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Predmet:	Angle estimation Antennas Applied sciences Arrays Couplings Detection, estimation, filtering, equalization, prediction Estimation Exact sciences and technology FDA radar frequency diverse array (FDA) Frequency diversity Frequency estimation Information, signal and communications theory Optimization Radar Radar antennas Radar signal processing range estimation Signal and communications theory Signal classification Signal representation. Spectral analysis Signal, noise source localization Telecommunications and information theory Transaction processing transmit beamforming transmit subaperturing Performance evaluation FDA radar Angle estimation frequency diverse array (FDA) Two dimensional model range estimation Phased array antenna Algorithm Signal classification Convex programming Beam forming Azimuth Source localization transmit beamforming Radar Signal processing Distance measurement transmit subaperturing Target detection Cramer Rao inequality
ISSN:	1053-587X, 1941-0476
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Popis
Shrnutí:	Different from conventional phased-array, which provides only angle-dependent beampattern, frequency diverse array (FDA) employs a small frequency increment across the antenna elements and results in a range-angle-dependent beampattern. This beampattern offers a potential to localize the targets in two dimensions in terms of slant ranges and azimuth angles. However, it is difficult to obtain the target location information from a standard FDA radar due to the couplings in range and angle responses. In this paper, we propose a transmit subaperturing scheme on the FDA radar for range and angle estimation of targets. The essence is to divide the FDA elements into multiple subarrays and optimize the transmit beamspace matrix with the use of convex optimization. We also discuss several practical issues for designing the FDA radar system parameters. Since the subarrays offer decoupled range and angle responses, the targets can be located using the beamspace-based multiple signal classification algorithm. The range and angle estimation performance is evaluated by comparing with the Cramér-Rao lower bound.
Bibliografia:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 14 ObjectType-Article-2 ObjectType-Feature-1 content type line 23
ISSN:	1053-587X 1941-0476
DOI:	10.1109/TSP.2014.2305638