Linear Frequency Modulation and Orthogonal Code Modulation for Co-Located Multiple-Input Multiple-Output High-Frequency Surface Wave Radar

被引:2
作者
Kim, Eunhee [1 ]
Sohn, Sunghwan [2 ]
Moon, Hyunwook [2 ]
Choi, Jun Hyeok [2 ]
Lee, Kiwon [2 ]
机构
[1] Sejong Univ, Dept Def Syst Engn, 209 Neungdong ro, Seoul 05006, South Korea
[2] LIGNex1 Co, 207 Mabuk ro, Yongin 16911, South Korea
关键词
MIMO; HF surface wave radar; orthogonal polyphase codes; virtual array antenna; MIMO RADAR; FORM;
D O I
10.3390/rs16010104
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
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.
引用
收藏
页数:18
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