Closed-form solution to directly design frequency modulated waveforms for beampatterns
Closed-form solution to directly design frequency modulated waveforms for beampatterns
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DOI：
10.1109/globalsip.2017.8308607
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发表时间：
2017-11
期刊：
影响因子：
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通讯作者：
Sajid Ahmed;Seifallah Jardak;Mohamed-Slim Alouini
中科院分区：
文献类型：
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作者：
Sajid Ahmed;Seifallah Jardak;Mohamed-Slim Alouini
目标成像性能取决于探测信号的发射波束图和功率谱密度。为了设计多输入多输出（MIMO）雷达的探测信号，传统的算法本质上是迭代的，因此高的计算复杂度限制了它们在真实的应用中的使用。为了获得理想的波束方向图，本文提出了一种新的MIMO雷达调频波形设计的封闭形式算法。该算法具有可忽略的计算复杂度，并产生单位峰均功率比恒定包络波形。此外，与窄带算法相比，它具有几乎平坦的主瓣和旁瓣。在该算法中，对称波束图的宽度与基带FM波形的初始频率和持续时间的乘积之间的关系被开发。
The targets image performance depends on the transmit beampattern and power-spectral-density of the probing signal. To design such probing signals for multiple-input multiple output (MIMO) radar, conventional algorithms are iterative in nature, therefore high computational complexity restricts their use in real time applications. In this paper, to achieve the desired beampattern, a novel closed-form algorithm to design frequency-modulated (FM) waveforms for MIMO radar is proposed. The proposed algorithm has negligible computational complexity and yields unity peak-to-average power ratio constant envelope waveforms. Moreover, in contrast to the narrow band algorithms, it has almost flat main and side lobes. In the proposed algorithm, a relationship between the width of symmetric beampattern and the product of initial frequency and duration of the baseband FM waveforms is developed.