Paper Info
Title
Range-azimuth decouple beamforming for frequency diverse array with Costas-sequence modulated frequency offsets.
Abstract
Different from the phased-array using the same carrier frequency for each transmit element, the frequency diverse array (FDA) uses a small frequency offset across the array elements to produce range-angle-dependent transmit beampattern. FDA radar provides new application capabilities and potentials due to its range-dependent transmit array beampattern, but the FDA using linearly increasing frequency offsets will produce a range and angle coupled transmit beampattern. In order to decouple the range-azimuth beampattern for FDA radar, this paper proposes a uniform linear array (ULA) FDA using Costas-sequence modulated frequency offsets to produce random-like energy distribution in the transmit beampattern and thumbtack transmit-receive beampattern. In doing so, the range and angle of targets can be unambiguously estimated through matched filtering and subspace decomposition algorithms in the receiver signal processor. Moreover, random-like energy distributed beampattern can also be utilized for low probability of intercept (LPI) radar applications. Numerical results show that the proposed scheme outperforms the standard FDA in focusing the transmit energy, especially in the range dimension.
Year
DOI
Venue
2016
10.1186/s13634-016-0422-3
EURASIP J. Adv. Sig. Proc.
Keywords
Field
DocType
Frequency diverse array (FDA) radar, Frequency offset, Range-dependent, Decouple, Costas sequence
Computer science,Digital signal processor,Frequency offset,Azimuth,Artificial intelligence,Carrier signal,Radar,Computer vision,Beamforming,Filter (signal processing),Acoustics,Low probability of intercept radar,Electrical engineering
Journal
Volume
Issue
ISSN
2016
1
1687-6180
Citations 
PageRank 
References 
0
0.34
0
Authors
3
Name
Order
Citations
PageRank
Zhe Wang100.34
Wen-Qin Wang2526.86
Huai-Zong Shao35013.46