Subbanding technique has been applied in wideband (WB) digital array radar systems to address the challenge of high-speed signal processing and WB jamming cancellation. This article reveals that the well-established subband decomposition by polyphase subband filtering could still leave jamming decorrelation post subbanding, which would deteriorate the jamming cancellation performance. A novel implementation of the subbanding processor is then proposed by isolating digital down conversion incorporated in the subbanding operation and performing it at baseband explicitly. This method provides flexibility to process segments of the digitized spectrum, which accommodates radar receivers to contemporary requirements of frequency agility. This article proceeds to propose a joint jamming cancellation scheme for use in the complicated real-world electronic warfare scenario including both mainlobe and sidelobe jamming. The jamming cancellation performance is evaluated by simulation with a detailed investigation on jamming decorrelation mitigation and subbanding implementation consideration. More results are shown by testing the cancellation scheme on data collected with an experimental airborne WB digital array radar in a multijamming scenario toward sea surface targets.

中文翻译：

---

利用子带实现增强型干扰消除的自适应宽带数字阵列雷达处理器的实现

子带技术已应用于宽带（WB）数字阵列雷达系统中，以解决高速信号处理和WB干扰消除的挑战。本文表明，通过多相子带滤波建立的完善的子带分解仍会留下子解带后的干扰去相关，这会降低干扰消除性能。然后，通过隔离合并在子带操作中的数字下变频并在基带上明确地执行它，提出了一种子带处理器的新颖实现方式。这种方法为处理数字化频谱段提供了灵活性，这使雷达接收器可以适应当代对频率捷变性的要求。本文着手提出一种联合干扰消除方案，该方案可用于复杂的实际电子战场景中，包括主瓣和旁瓣干扰。通过仿真对干扰消除性能进行评估，并详细研究了干扰去相关缓解和子带实现的考虑因素。通过在针对海面目标的多干扰情况下，用实验性机载WB数字阵列雷达收集的数据测试抵消方案，可以显示更多结果。