lofar谱 matlab_lofar是什么意思

1. A new method is presented in this paper for the calculation of waveguide invariant with passive sonar lofargram image.

摘要该文提出了利用被动声纳信 LOFAR谱图的二维傅里叶变换计算波导不变量的方法。

2. Secondly, 4 methods of azimuth estimation based on vector hydrophone according to forms of nosie and signal are brought forward. The principles of these 4methods are set forth, simulating them by computer. Acoustic intensity averager can effectively suppress isotropic non-coherent interference; DOA based on line-spectra can effectively detect the target radiating line-spectra and estimate its azimuth angle; Bar graph approach can suppress line-spectra coherent interference and distinguish different targets radiating line-spectrum. Weighted bargraph approach can detect target in broadband coherent interference and estimate its azimuth angle.

其次，根据背景干扰和信 样式的不同，提出了单矢量水听器方位估计的4种方法；阐述了这4种方法的原理，并进行了计算机仿真，指出平均声强器方位估计适用于各向同性噪声场背景干扰，讨论了平均声强器的处理增益；目标辐射噪声中有线谱时，线谱方位估计有很好的性能，其中的LOFAR线谱和高频解调得到的DEMON线谱都是目标的特征谱线，可以利用它们进行方位估计，详细讨论了利用特征线谱单个矢量水听器分辨多目标的性能；直方图方位估计能抗强线谱相干干扰；加权直方图方位估计可以抗宽带相干干扰。

3. LOFAR Sonobuoy Signal Processing Based on Adaptive Line Enhancer and Doppler-CPA Positioning

基于自适应线谱增强的LOFAR浮标信 处理及Doppler-CPA定位方法

4. A 160 Gbit/s demonstrator towards the application for a low frequency antenna array network called LOFAR is presented.

告了一个用于低频射频天线 络LOFAR的160Gbit/s演示平台。

5. Principal Component Analysis on Lofar Spectrum Features of Underwater Target Signals

水下目标信 的Lofar谱图特征的主分量分析研究

6. By DEMON we can get more and stabler line spectrum information than by LOFAR, which is to make power spectrum analysis of signal directly. Several demodulation methods are introduced and compared.

通过包络解调技术可获得轴频等调制信息，这就是常用的DEMON谱分析方法。

7. It focuses on the system hardware design and data acquisition and processing software, a detailed description of the LOFAR digital signal processing and graphics display, sensor design, debug and test chamber sphere tank experiment design steps.

重点分析了系统硬件设计及采集处理软件的功能，详细描述了LOFAR数字信 处理及图形显示方式、传感器球体设计、试验室调试及水池试验等设计步骤。

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