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- Title
Linear Frequency Modulation and Orthogonal Code Modulation for Co-Located Multiple-Input Multiple-Output High-Frequency Surface Wave Radar.
- Authors
Kim, Eunhee; Sohn, Sunghwan; Moon, Hyunwook; Choi, Jun Hyeok; Lee, Kiwon
- Abstract
A high-frequency surface wave radar (HFSWR) is the only sensor that provides inexpensive surveillance for up to 200 nautical miles (NM) of the exclusive economic zone in the 3–5 MHz band. However, because of its long wavelength, its angular resolution is low. Multiple-input multiple-output (MIMO) technology is an attractive method to improve angular resolution. This paper proposes MIMO waveforms and their processing that can be used in HFSWR systems. This dual modulation method applies linear frequency modulation to each pulse and orthogonal polyphase codes for a few consecutive pulses to enable MIMO processing. The proposed method can effectively remove the correlation of mutual interference and exhibits excellent performance in removing multiple-time-around echoes.
- Subjects
ORTHOGONAL codes; MIMO radar; PULSE frequency modulation; MODULATION coding; RADAR
- Publication
Remote Sensing, 2024, Vol 16, Issue 1, p104
- ISSN
2072-4292
- Publication type
Article
- DOI
10.3390/rs16010104