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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Veröffentlicht in:IEEE transactions on signal processing Jg. 62; H. 8; S. 2000 - 2011
Hauptverfasser: Wen-Qin Wang, So, H. C.
Format: Journal Article
Sprache:Englisch
Veröffentlicht: New York, NY IEEE 01.04.2014
Institute of Electrical and Electronics Engineers
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Schlagworte:
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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Beschreibung
Zusammenfassung: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.
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ISSN:1053-587X
1941-0476
DOI:10.1109/TSP.2014.2305638