An Improved Adaptive Received Beamforming for Nested Frequency Offset and Nested Array FDA-MIMO Radar
| Autor: | Mingming Bian, Xinhong Hao, Sibei Cheng, Qingjun Zhang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Beamforming
Main lobe Computer science 02 engineering and technology nested frequency offset lcsh:Chemical technology Biochemistry FDA-MIMO nested array adaptive beamforming Article Analytical Chemistry law.invention 0203 mechanical engineering Side lobe law 0202 electrical engineering electronic engineering information engineering Frequency offset lcsh:TP1-1185 Electrical and Electronic Engineering Radar Instrumentation Computer Science::Information Theory 020301 aerospace & aeronautics Covariance matrix 020206 networking & telecommunications Atomic and Molecular Physics and Optics Algorithm Adaptive beamformer Diversity scheme |
| Zdroj: | Sensors; Volume 18; Issue 2; Pages: 520 Sensors, Vol 18, Iss 2, p 520 (2018) Sensors (Basel, Switzerland) |
| ISSN: | 1424-8220 |
| DOI: | 10.3390/s18020520 |
| Popis: | For the conventional FDA-MIMO (frequency diversity array multiple-input-multiple-output) Radar with uniform frequency offset and uniform linear array, the DOFs (degrees of freedom) of the adaptive beamformer are limited by the number of elements. A better performance—for example, a better suppression for strong interferences and a more desirable trade-off between the main lobe and side lobe—can be achieved with a greater number of DOFs. In order to obtain larger DOFs, this paper researches the signal model of the FDA-MIMO Radar with nested frequency offset and nested array, then proposes an improved adaptive beamforming method that uses the augmented matrix instead of the covariance matrix to calculate the optimum weight vectors and can be used to improve the output performances of FDA-MIMO Radar with the same element number or reduce the element number while maintain the approximate output performances such as the received beampattern, the main lobe width, side lobe depths and the output SINR (signal-to-interference-noise ratio). The effectiveness of the proposed scheme is verified by simulations. |
| Databáze: | OpenAIRE |
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