| Autor: |
Jin Zhen, Xie Liang-gui, Wen Shu-liang |
| Jazyk: |
English<br />Chinese |
| Rok vydání: |
2014 |
| Předmět: |
|
| Zdroj: |
Leida xuebao, Vol 3, Iss 4, Pp 474-479 (2014) |
| Druh dokumentu: |
article |
| ISSN: |
2095-283X |
| DOI: |
10.3724/SP.J.1300.2014.13077 |
| Popis: |
The linear zone of the S-curve, which is formed with the digital beamforming (DBF) method, is extremely narrow for monopulse angle measurements with distributed Multiple-Input and Multiple-Output (MIMO) radar. Based on the transmitting-receiving beam pattern without gratelobe, the DBF method is proposed to form the ΣΔ-beam by using the absolute value of the echo signal. The ideal null depth can be achieved and the linear zone of the S-curve is expanded because the main lobe of the Δ-beam is enveloped by the Σ-beam. The monopulse angle for a target with high angle velocity was estimated. When the Signal-to-Noise Ratio (SNR) was higher than -15 dB , the accuracy of the proposed method was better than that of conventional methods. When the SNR was equal to -15 dB , the accuracy of the proposed method was similar to conventional methods that use coherent integration before taking the absolute value of the echo signal. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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