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声纳中具方向性宽带强干扰的实时抑制方法   总被引:1,自引:0,他引:1       下载免费PDF全文
声纳中具方向性的宽带强干扰严重影响远处舰船的检测。本文针对此问题,提出一种能实时抑制此类干扰的方法,它以保证干扰方向输出功率最小为约束条件,本文还研究了此方法对目标信号的性能影响情况。最后,通过对海试数据的处理,证明此方法在实践中比较有效。  相似文献
2.
李昌立  董永宏 《物理》2006,35(8):637-644
文章简要介绍了“数字信号处理”与“数字信号处理器(DSP)”的发展历史.在数字信号处理的应用中,实时实现是非常重要的,而DSP在实时处理中,扮演了一个重要的角色.文章中还介绍了DSP在实际应用中的一些关键技术,例如DSP的种类和选型,DSP的开发工具,实时软件的开发过程等.最后,还介绍了一些DSP的应用实例,如语音编码器,视频电话和视频会议系统,用于雷达和声纳的DSP并行处理系统  相似文献
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苏涛  奚玮 《光子学报》2005,34(7):1113-1116
利用正交双路光纤传输光电流信号的处理方法,满足了光纤电流互感器在电力系统暂态保护应用中的实时处理要求.此方法可从正交双路光信号中直接提取两路电流信息,减小了光路传输不理想对电流测量值的影响.结合模数变换过采样技术和先进的数字信号处理技术,提高了系统对暂态故障的响应速度,改进了检测性能.实验表明,此方法在暂态信号的采集和实时处理方面,比现有方法的迟延小且精度高.  相似文献
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Landing in poor weather is a crucial problem for the air transportation system of the future. To aid the pilots for these conditions several solutions have been suggested and/or implemented including instrument landing system(ILS) and microwave landing system(MLS) that put the responsibility of the landing to a large extent in the hands of the airport facilities. These systems even though useful are not available due to their high costs except in few major metropolitan airports. This shortcoming has generated interest in providing all weather capabilities not on the landing facility but on the vehicle itself. The Synthetic Vision System Technology Demonstration sponsored by the United States Federal Aviation Administration(FAA) and the US Air Force represents an effort to respond to the above needs[1,2]. In this paper we present a summary of a typical synthetic vision system. This system consists of a scanning 35GHz radar a scanning antenna, a signal/image processor and a head up display(HUD). The pilot is presented a final perspective image of the scene sensed by the radar with associated flight guidance symbology. This systems is implemented in real time hardware and has been under going tower and flight testing under a variety of weather conditions since early 1992.  相似文献
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