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http://dx.doi.org/10.5515/KJKIEES.2019.30.5.373

Cramér-Rao Lower Bound of Multipath Angle Estimation for Low-Flying Target of Dual-Frequency Airborne Radar  

Jung, Ji Hyun (Hanwha System PGM)
Kim, Jinuk (Hanwha System PGM)
Lee, Joohyun (Hanwha System PGM)
Chun, Joohwan (KAIST Electrical Engineering)
Oh, Yougeun (KAIST Electrical Engineering)
Suh, Jinbae (KAIST Electrical Engineering)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.30, no.5, 2019 , pp. 373-379 More about this Journal
Abstract
If two signals with the same single-tone frequency and differing phases impinge simultaneously on an antenna at slightly differing angles, then a large error in the angle estimation might occur if the phase difference is either $0^{\circ}$ or $180^{\circ}$. This phenomenon might arise with an airborne fire-control radar, which has a relatively small bandwidth, for a low-flying target over the sea or terrain surface. In this paper, we show that the $Cram{\acute{e}}r$-Rao lower bound for such a target can be significantly lowered with the use of two frequencies.
Keywords
Airborne Radar; Multipath; CRLB; Angle Estimation;
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