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针对无线通信过程中,传统系统对微弱通信信号检测准确度不高的问题;分析了微弱通信信号传递的极化特性,利用电波的极化特性优化双极化天线的方法,基于TD-SCDMA双极化天线技术,设计并实现了基于TD SCDMA双极化天线的微弱通信信号检测系统,根据TD SCDMA双极化天线技术实现微弱通信信号的检测,采用TM320LF2407 DSP2407芯片的脉冲信号检测系统的设备,分析了信号检测系统的硬件结构设计,分析双极化天线下微弱通信信号的网络规划,在该网络规划条件下通过匹配滤波幅值检测完成微弱通信信号的检测;实验结果说明,所提检测系统能够满足微弱通信信号的实时检测和精度要求. 相似文献
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该文具体提出了新一代雷达终端基于DSP、PCI总线和Windows操作系统的整体解决方案。着重阐述了雷达数据帧处理和雷达终端软件化的思想。 相似文献
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作为S波段新一代天气雷达的重要补充,目前广东省正加快建设X波段双极化相控阵天气雷达;如何更好地做好优化布局提升全网覆盖率和探测能力,站点选择是否科学合理显得尤为重要;文章设计一套全新的基于数字高程DEM的探测环境参数智能分析系统,客观、定量、自动计算探测净空投影面积、净空占总投影面积比例、投影阻挡面积比例、探测净空体积、静锥盲区体积、低空盲区体积、扫描立体空域完备度等,在现场选址时能够1分钟内输出综合分析结果和建议;作为辅助选址系统,已经在广东省26部X波段双极化相控阵天气雷达选址中应用,输出结论对现场选址起到了很好的指导性作用,为雷达系统建设快速提供科学决策依据. 相似文献
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研究雷达极化抗干扰问题,当雷达面临敌方实施的随机极化干扰时,传统的极化滤波方法由于无法估计出干扰的极化参数,引起抗干扰性能急剧恶化。为应对快变随机极化干扰对雷达系统的巨大威胁,提出了一种新的极化加权变换的滤波方法,通过对正交双极化通道信号的加权变换,将随机极化干扰压缩到庞卡莱球上的一个很小的区域,且中心点与信号极化的状态点成交叉极化。极化加权变换后的干扰与真实信号已经接近为正交极化,可省去传统方法需要干扰极化参数估计的环节,只需采用与信号极化状态相同的Jones矢量进行极化滤波即可实现对干扰的大幅度抑制,并保证信号在滤波后无损耗。理论分析和仿真结果均验证了极化加权变换法的有效性。 相似文献
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雷达接收机将雷达回波信号变成中频信号,数字信号处理系统对中频信号采样和处理.本文介绍一种基于A/D和DSP的中频信号采集技术;给出数据采集系统的原理和框图,并对A/D与DSP的接口电路进行分析.用FIFO作为两者之间的接口效果很好;DSP通过CPLD对采样时序进行控制,可增强系统的灵活性. 相似文献
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双DSP实现气象雷达信号处理 总被引:1,自引:0,他引:1
DSP和MC比较,DSP具有高速、高精度、极为适合信号处理和控制的特点,构成的系统成本与MC相当或更低,因此DSP越来越受到人们的重视。本文讨论了利用TI的定点DSP双TMD320F206实现气象雷达信号处理器的方法。 相似文献
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Omar A. Saraereh 《计算机系统科学与工程》2022,43(1):413-422
At present, the microwave frequency band bandwidth used for mobile communication is only 600 MHz. In 2020, the 5G mobile Communication required about 1 GHz of bandwidth, so people need to tap new spectrum resources to meet the development needs of mobile Internet traffic that will increase by 1,000 times in the next 10 years. Utilize the potentially large bandwidth (30∼300 GHz) of the millimeter wave frequency band to provide higher data rates is regarded as the potential development trend of the future wireless communication technology. A microstrip patch implementation approach based on electromagnetic coupling feeding is presented to increase the bandwidth of a dual-polarized millimeter-wave antenna. To extend the antenna unit's impedance bandwidth, coplanar parasitic patches and spatial parallel parasitic patches are used, and a 22 sub-array antenna is developed using paired inverse feed technology. The standing wave at the centre frequency of 37.5 GHz is less than 2 GHz. The antenna array's relative bandwidth is 6.13 percent, the isolation is >30 dB, the cross-polarization is −23.6 dB, and the gain is 11.5 dBi, according to the norm. The proposed dual-polarized microstrip antenna has the characteristics of wide frequency bandwidth, large port isolation, low cross-polarization, and high gain. The antenna performance meets the general engineering requirements of millimeter-wave dual-polarized antennas. 相似文献
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天气信息作为人们日常生活的重要信息具有不可替代性. 移动终端天气信息服务系统是采用Java技术在Android平台下,通过访问新浪云开放的天气API,调用新浪云服务,获取并在移动终端显示天气数据的一种“云端”应用系统,该系统具有响应快、天气数据精准的特点. 文章对移动终端天气信息服务系统的技术背景、系统总体设计,系统实现作了简要介绍. 相似文献
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基于3G流媒体的养殖厂远程监测控制系统研究 总被引:2,自引:0,他引:2
3G网络具有传输速度快覆盖面广等特点,文章以远程工厂化养殖系统为对象,研究一种基于3G的具有测试终端、后台计算机和移动终端的三方可远程监控系统的相关问题,由DSP测控终端完成现场的测试分析和控制,远程计算机数据管理系统完成对数据的存贮和分析,移动终端起作远程监测和控制,制定的3G用户协议解决多种数据综合流媒体方式的实时任务交换,研制的系统实现了远程数据采集、分析、监测和控制功能,具有良好的应用价值。 相似文献
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以集控式足球机器人为研究对象,以双闭环视觉伺服控制结构为主线,提出了基于DSP技术和非线性PI控制算法的机器人小车控制系统设计,保证了控制的准确性,提高了控制的实时性;论证了单参数模糊自校正非线性PI算法应用于机器人位置环控制中的可行性,增强了系统的自适应能力。实验证明了此方案对足球机器人运动控制的有效性,其原理对其它类型移动机器人的控制同样有借鉴作用。 相似文献
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Ahmad C. Bukhari Inara Tusseyeva Byung-Gil lee Yong-Gi Kim 《Expert systems with applications》2013,40(4):1220-1230
Due to brisk industrial growth, the marine traffic has become an imperative subject in the open sea nowadays. The crew inside the vehicle traffic service (VTS) centre is facing challenging issues on account of continuous growth in vessel number. Currently, most of VTS centers’ are using the ARPA RADAR based conventional vehicle traffic management system and VTS staff has to carry out most of the things manually to guide the ship’s captain properly. Therefore, there is a strong impetus in the field of ocean engineering to develop a smart system which can take the data from RADAR and autonomously manipulate it, to calculate the degree of collision risk among all vessels from the VTS centre. Later on, the traffic management officer utilizes this information for intelligent decision making. In the past, several researchers have addressed this issue to facilities the VTS crew and captain of the ship but mostly, their research work was for academic purposes and could not get popularity because of extra manual workload. Our proposed vessel collision risk assessment system is an intelligent solution which is based on fuzzy inference system and has the ability to solve the said issues. We calculated the DCPA, TCPA, bearing and VCD among all vessels ships from the VTS centre by using conventional marine equipments and exploited the extracted information to calculate and display the degree of collision risk among all vessels. Furthermore, we developed the RADAR filtration algorithm which helps the VTS officer to gauge out the degree of collision risk around a particular ship. To authenticate the validity and to monitor the performance efficiency, we developed RADAR operated intelligent software which directly gets the required data from RADAR and displays the vessels list based on their degree of collision severity. The laboratory experiments confirm the validity of the proposed system. 相似文献