Multipath angle estimation for low-flying target of multi-frequency shipborne radar

Yougeun Oh; Joohwan Chun; Jinbae Suh; Jihyun Jung; Jinuk Kim; Joohyun Lee

doi:10.1117/12.2541524

12 November 2019 Multipath angle estimation for low-flying target of multi-frequency shipborne radar

Yougeun Oh, Joohwan Chun, Jinbae Suh, Jihyun Jung, Jinuk Kim, Joohyun Lee

Proceedings Volume 11197, SPIE Future Sensing Technologies; 111970C (2019) https://doi.org/10.1117/12.2541524
Event: SPIE Future Sensing Technologies, 2019, Tokyo, Japan

Abstract

If two signals, which have a same single frequency and different phases, impinge on an antenna array simultaneously at similar angles, a large error occurs in the angle estimation when the phase of two signals is different by 0 or 180 degrees. This phenomenon might occurs for low-flying target since direct signals and surface-reflected signals are on the same range bin because of relatively small bandwidth of shipborne radar. In this paper, we show the Cramer-Rao lower bound of the angle estimation lowered by using multiple frequencies. Also, using maximum likelihood estimation, we show that mean square error of the angle estimation lowered when we use multi-frequency radar.

Citation Download Citation

Yougeun Oh, Joohwan Chun, Jinbae Suh, Jihyun Jung, Jinuk Kim, and Joohyun Lee "Multipath angle estimation for low-flying target of multi-frequency shipborne radar", Proc. SPIE 11197, SPIE Future Sensing Technologies, 111970C (12 November 2019); https://doi.org/10.1117/12.2541524

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