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Subarray-Based Frequency Diverse Array for Target Range-Angle Localization With Monopulse Processing
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DOI：10.1109/JSEN.2018.2844280.png)
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Frequency diverse array (FDA) can offer new degrees-of-freedom, but the target localization of basic FDA is fundamentally limited by the range-angle-coupled and range-periodic peaks of beampattern. In this paper, we propose a localization system with the combination of subarray-based FDA and full-band FDA, as the transmitter and the receiver, respectively. The transmit and receive beampatterns are both decoupled in range and angle domains. Target range-angle localization is achieved by two steps. First, using the outputs of subarrays, we solve the range ambiguity and obtain a coarse location. Second, the monopulse processing of range-angle localization is developed for the proposed system by taking the coarse location as the receiving beam pointing. The localization performance is also analyzed in Cramer-Rao lower bound, computational complexity, and output signal to interference-plus-noise ratio. Several simulation results demonstrate that unambiguous target range-angle localization can be achieved with a low computational cost by the proposed method.
Keyword:
Frequency diverse array (FDA)
target localization
range ambiguity
computational complexity
monopulse processing
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4.5
论文数:
2.1W
被引数:
7.3W
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