宽带测向研究现状及展望

Research and development of wide-band direction finding

宽带测向是雷达与电子对抗领域的关键技术之一.由于宽带信号相对带宽大的特点,当它入射到阵列的各个传感器上,其复包络就不能假设为恒定.因此,与窄带测向相比,宽带测向不能在时域进行,处理起来也就困难得多.介绍了与宽带测向相关的基本概念,包括数学模型、影响波达方向估计结果的因素和性能参数,叙述了它的研究现状,对现有各种宽带测向算法进行了分析,指出宽带测向技术当前面临的难题,并且对其发展方向进行预测,以期推动我国在该领域的研究工作.

Wide-band direction finding is one of the key techniques in the fields of radar and electronic counter work. For its large relative bandwidth, when wide-band source radiates on sensors of array, their envelopes cannot be asstmaed to be constant. Compared with narrow-band direction finding, the wide-band direction finding could not be processed in time-domain, which adds to its complexity. Concepts related to wide-band direction finding are introduced, as well as factors that affect direction of angle estimation and performance parameters. The research status of wide-band direction finding is summarized, including the technological challenges and prospects of development in China.