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Reconfigurable and Adaptive Radar Amplifiers for Spectrum Sharing in Cognitive Radar

机译：用于认知雷达中的频谱共享的可重构和自适应雷达放大器

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The increased use of the wireless spectrum for broadband applications has necessitated a new approach to radar transmission. Future radar systems will be required to adjust operating frequency in real time to avoid interference from other wireless devices operating in the same band. This paper describes the use of a 90 W tunable power-amplifier matching circuit to reconfigure a power amplifier for high power-added efficiency and spectral compliance at multiple frequencies within the S-band. To reconfigure the amplifier in real-time spectrum sharing scenarios, a modified gradient search algorithm is employed to tune the amplifier based on measured data. A look-up table allows previous optimum tuner settings to be stored after the first reconfiguration at each operating frequency, allowing faster optimizations upon re-visits to each frequency. Next research steps are discussed; including the streamlining of system timing, operating the search algorithm under control of spectral prediction and decision-making processes and analyzing the effect of impedance tuning on range and Doppler detection.
机译：用于宽带应用的无线频谱的使用增加需要一种新的雷达传输方法。需要未来的雷达系统实时调整工作频率，以避免与在同一频段中操作的其他无线设备的干扰。本文介绍了90 W可调谐功率放大器匹配电路的使用，以重新配置功率放大器，以获得高功率的效率和S波段内的多个频率的频谱顺应性。为了在实时频谱共享场景中重新配置放大器，采用修改的梯度搜索算法来基于测量数据调整放大器。查找表允许在每个工作频率的第一次重新配置之后存储先前的最佳调谐器设置，从而在重新访问每个频率时允许更快的优化。讨论了下一步研究步骤;包括在控制频谱预测和决策过程的控制下操作搜索算法的系统定时，并分析阻抗调谐对范围和多普勒检测的影响。

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