| Research on the frequency domain ∑△-DPCA |
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| 作者单位： | Shen Mingwei（Dept. of Electronic Engineering, Nanjing Univ. of Aeronautics and Astronautics, Nanjing 210016, P. R. China） ;
Zhu Daiyin（Dept. of Electronic Engineering, Nanjing Univ. of Aeronautics and Astronautics, Nanjing 210016, P. R. China） ;
Zhu Zhaoda（Dept. of Electronic Engineering, Nanjing Univ. of Aeronautics and Astronautics, Nanjing 210016, P. R. China） ; |
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| 基金项目： | This project was supported by the National Natural Science Foundation of China (60502030). |
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| 摘 要： | The frequency domain ∑A-DPCA processing （F-∑A-DPCA） is investigated in details and an improved scheme for the F-∑A-DPCA is proposed, which can significantly reduce the computational burden. In practice, because of the sum and difference beam pattern designed independently and other system errors, the clutter suppression of the time domain ∑A-DPCA processing （T-∑A-DPCA） is significantly degraded. However, the F-∑A-DPCA adaptively calculates the optimum gain ratio for motion compensation within each Doppler cells which is robust to system errors. Theoretical analysis and simulation results are presented to validate that the F-∑A-DPCA can achieve superior performance of clutter cancellation than the time domain processing, and its performance can be significantly increased if more pulses are used for the Doppler filtering. The improved approach is efficient, and feasible for real-time application.
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| 关 键 词： | 相位中心偏置天线 抗干扰性 最优化分析 负荷 |
| 收稿时间： | 27 December 2006 |
Research on the frequency domain ΣΔ–DPCA |
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| Authors: | Shen Zhu Zhu |
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| Institution: | aDept. of Electronic Engineering, Nanjing Univ. of Aeronautics and Astronautics, Nanjing 210016, P. R. China |
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| Abstract: | The frequency domain ΣΔ–DPCA processing (F–ΣΔ–DPCA) is investigated in detail, and an improved scheme for the F–ΣΔ–DPCA is proposed, which can significantly reduce the computational burden. In practice, because of the sum and difference beam pattern designed independently and other system errors, the clutter suppression of the time domain ΣΔ–DPCA processing (T–ΣΔ–DPCA) is significantly degraded. However, the F–ΣΔ–DPCA adaptively calculates the optimum gain ratio for motion compensation within each Doppler cell, which is robust to system errors. Theoretical analysis and simulation results are presented to validate that the F–ΣΔ–DPCA can achieve superior performance of clutter cancellation than the time domain processing, and its performance can be significantly increased if more pulses are used for the Doppler filtering. The improved approach is efficient, and feasible for real-time application. |
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| Keywords: | ΣΔ-Beam ΣΔ-DPCA optimum gain ratio clutter cancellation |
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