lofar谱图分析是较具代表性的被动声纳信号处理方法之一。 该方法通过对采样数据作 短时傅立叶变换 而构成信号表达的三维图（声谱图）。 当噪声信号随时间发生比较明显的变化，即信号 …

The LOFAR (Waite, 2003) is a broadband analysis that provides the machinery noise to the sonar operator and goes from DC to 15,625 Hz. The block diagram of the LOFAR analysis is shown …

Low Frequency Analyzer and Recorder and Low Frequency Analysis and Recording (LOFAR) are the equipment and process respectively for presenting a visual spectrum representation of low …

Block diagram of the LOFAR analysis. The noise radiated from ships can be used for their identification and classification using passive sonar systems. Several techniques have been …

LOFAR [2] is a broadband analysis that provides the machinery noise spectra to the sonar operator and goes from DC to 15,625 Hz. The block diagram of the LOFAR analysis is shown …

In this paper, deep learning models are used for full exploitation of such acquired data, envisaging passive sonar signal classification. A drawback of such models is the large number of...

1996年1月10日 · Lofar is an acronym for LOw Frequency Analysis and Recording. Its main characteristics are: Signal to noise ratio is low due to the discreteness of the sources. A …

2023年11月6日 · low-frequency array (LOFAR)技术分析 基于高频天线产生低频电磁波信号, 实现多波段信号对目标的照射, 不仅有可能减小低频天线尺寸, 而且可能成为提高雷达目标探测性能 …

The Low-Frequency Array (LOFAR) is a large radio telescope, with an antenna network located mainly in the Netherlands, and spreading across 7 other European countries as of 2019.

Basic LOFAR Concept • Frequency Range: 10-90 MHz and 110-220 MHz • High-frequency: 4x4 grid with RFBF • A/D conversion at antenna level (65 MS/s, 14 bit) • Antennas combined into …