However, due to the excrescent side lobe, the current drive efficiency is lower. 但由于存在多余副瓣,驱动效率较低。
The effect of antenna parameters on the beamwidth and side lobe level is analyzed. 分析了天线参数对主瓣宽度和副瓣电平的影响;
The relative side lobe of sweeping signal is an important factor impacting the seismic data quality acquired by vibrator. 扫描信号的相关旁瓣是影响可控震源资料质量的主要因素。
With the aid of a computer, curves of beamwidth and side lobe versus the antenna parameters are plotted. 并借助计算机绘出了主瓣宽度和副瓣电平与天线主要参数的关系曲线;
Based on uniform line array, the sonar equation of active sonar beam main lobe and side lobe interfered by noise-jammer are presented. 研究了噪声干扰器对鱼雷主动声呐的对抗原理,以等间隔直线阵为例,分别给出了干扰器对鱼雷主动声呐主瓣和旁瓣的干扰方程。
Sub Array Digital Beam forming Method with A Low Side Lobe 一种低旁瓣的子阵级数字波束形成方法
Contrasting to the Fourier filter, the single lobe filter has not side lobe, and its data window length is not restricted to multiples of one cycle. 对传统的傅立叶滤波器与一种新型的单瓣滤波器进行了比较研究。
Effective side lobe suppression approach for beam scanning at sub-array level 一种有效的子阵级波束扫描旁瓣抑制方法
A New Way of Evaluating the Side lobe Requirement of an AEW Radar Antenna 一种新的估算机载预警雷达天线副瓣要求的方法
Application of Side Lobe Suppression Technique in Type ⅱ IFF System 旁瓣抑制技术在Ⅱ型敌我识别系统中的应用
Low side lobe SIW slot array circular polarized antenna 低副瓣基片集成波导缝隙阵圆极化天线
The weighed FFT ( WFFT) can suppress the side lobe but decrease the SNR in main lobe. 利用加窗FFT可以抑制副瓣,但降低了主瓣信噪比。
The array parameters are optimized using the nonlinearly constrained optimization method so that the antenna achieves side lobe suppression up and null filling down in the vertical radiation pattern. 采用约束非线性优化方法,对其阵列参数进行优化,实现了垂直面内上半空间的旁瓣抑制和下半空间的零值填充。
Receiving side lobe restrain was realized by compared the receiving signal extent for sum and difference beams of transponder. 通过比较询问机和差波束接收信号幅度实现接收旁瓣抑制;
Based on [ 1], discuss a new adaptive side lobe cancellation algorithm. 基于文献[1],讨论了一种新的自适应天线旁瓣相消算法。
This paper presents a method of using the windows function to design FIR digital filter. The finite length unit pulse series can be assured according to filter technical indexes, to make sure the filter has the most narrow width main lobe and the smallest side lobe. 介绍了利用窗函数设计FIR滤波器的方法,即根据给定的滤波器技术指标,确定有限长单位脉冲序列,通过选择滤波器的长度和窗函数,使其具有最窄宽度的主瓣和最小的旁瓣。
Amplitude error sources will make peak side lobe ratio increase and signal noise ratio reduce. 根据幅度误差的产生原因和可能引起的结果,指出幅度误差对脉压的影响表现在峰值副瓣比增大和信噪比降低,给出了定量的结论。
Cancellation gain of antenna decreases rapidly with increasing of bandwidth of interference in adaptive side lobe cancellation. 在自适应旁瓣相消技术中,天线的相消增益会随着信号带宽的增加而迅速下降。
The lab analysis showed the correlation wavelet of log-partitioning sweeping signal has minimum correlation side lobe. 实验室分析表明,对数分段扫描信号的相关子波有着极小的相关边叶。
By means of simulating test, it is proved that this new method could complete the side lobe suppression of LFM-BC signal and the complexity of designing weighting filter net is depressed. 仿真实验证明,这种新的旁瓣抑制方法可以完成LFMBC雷达信号的旁瓣抑制,同时降低了LFMBC雷达信号脉压系统中加权滤波网络设计的复杂性。
When Doppler frequency of target does not match the FFT bin frequencies exactly, the high side lobe appears. 当目标的多普勒频率与FFT滤波器组不精确匹配时,会产生FFT的高副瓣现象。
Investigation on the Working Modes of Side Lobe Cancellation System of Phased Array Radar 相控阵雷达旁瓣对消工作模式研究
The signal effect in the conventional adaptive side lobe canceller system is studied. 首先研究了常规的自适应旁瓣对消系统中的目标效应问题。
Some problems are analysed for SAR side lobe signal reconnaissance and tracking which providing reference for development of ground reconnaissance tracking system. 分析了对SAR卫星旁瓣信号进行侦察跟踪的若干问题,为地面侦察跟踪系统各指标的研制提供参考。
We analyze bi-directional compatibility between radar and outside electromagnetism circumstance and also bring a detailed introduction to narrowband receiver, DDS ( Digital Direct Synthesis) frequency synthesizer and side lobe cancellation ( SLC). 文中分析了雷达与外部电磁环境之间的双向兼容性问题,并对所采取的窄带接收机、数字直接合成(DDS)频率源和副瓣对消技术作了介绍。
The directional hidden terminal problems and side lobe interference for the network using directional antennas are considered. Through directional busy tone signals and the power control method, the directional transmission power of data packets can be adjusted in time. 协议充分考虑到定向天线应用中存在的定向隐藏终端问题和旁瓣干扰,利用定向忙音信号和基于信噪比门限的功率控制策略,对数据分组的定向发送功率进行实时调整。
To satisfy engineering needs, it is required that array antennas have narrow main lobe and low side lobe to improve spatial resolution and anti-interference performance of many systems, such as radar. 为了满足工程需要,阵列天线要有窄的主瓣和低的副瓣以提高雷达等系统的空间分辨率和抗干扰性能。
The array antenna with low side lobe is designed by employing the Taylor synthesis and density taper sparseness with an overall consideration of the radiation and scattering performance. The side lobe of the array antenna is optimized by random search. 在综合考虑辐射和散射特性的基础上利用泰勒综合和密度锥削稀疏技术设计了低副瓣电平阵列天线,并采用随机遍历算法对阵列天线副瓣进行了优化。
ISAR imaging turntable model is discussed and the calculation of resolution is calculated. We discuss the commonly used ISAR imaging motion compensation method, and using side lobe suppression during the signal processing in order to enhance the effect of imaging. 4. 对ISAR成像转台模型进行了讨论和分辨率的计算,讨论了常用的ISAR成像运动补偿方法,并在信号处理过程中引入旁瓣抑制以增强成像的效果。
Emphasis is put on the analysis of the effects of array leaning on its radiation and scattering characters, which shows that the side lobe plays an important role in the stealth characters of the array. 重点分析了阵列的倾斜安装对天线辐射和散射特性的影响,对副瓣电平在天线隐身中的重要性进行了理论分析。