MIMO radar with spatial-frequency diversity for improved detection performance
MIMO radar with spatial-frequency diversity for improved detection performance
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DOI：
10.1109/icccct.2010.5670726
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发表时间：
2010-12
期刊：
影响因子：
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通讯作者：
Kiran V. Shanbhag;D. Deb;M. Kulkarni
中科院分区：
文献类型：
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作者：
Kiran V. Shanbhag;D. Deb;M. Kulkarni
多输入多输出（MIMO）雷达概念利用了阵列元素信号之间的独立性，而波束形成则假定阵列发射或接收的信号之间具有高度相关性。复杂目标的雷达截面积（RCS）随发射频率和目标几何形状而变化。MIMO雷达系统通过广泛分离发射天线和接收天线，从不同角度同时观测目标，从而产生空间分集，从而提高了探测性能。同样，通过利用不同的频率，可以观察到目标的独立RCS，从而产生频率分集。本文将空间分集和频率分集结合起来进行研究，得出两者的综合效益。该系统不仅具有多个适当间隔的天线，而且具有多个适当间隔的工作频率，在相同的发射功率下提供比传统MIMO雷达系统更好的探测性能。仿真结果表明，与仅具有空间分集的MIMO雷达系统相比，该系统具有更好的检测性能。
The Multiple Input Multiple Output (MIMO) radar concept exploits the independence between signals at the array elements unlike beamforming which presumes a high correlation between signals either transmitted or received by an array. Radar Cross Section (RCS) of a complex target varies with both transmitted frequency and target geometry. By widely separating transmit and receive antennas, MIMO radar systems observe a target simultaneously from different aspects resulting in spatial diversity, thus improving the detection performance. Also by utilizing different frequencies, independent RCS of the target can be observed, thus resulting in frequency diversity. In this paper, the spatial and the frequency diversities are studied together to bring out the combined benefits. The system proposed will not only have several antennas appropriately spaced but also several operating frequencies appropriately spaced, providing a better detection performance than conventional MIMO radar systems for the same transmission power. The simulation results exhibit a better detection performance of the proposed system as compared to MIMO radar systems with only spatial diversity.