ID 原文 译文
54157 然后,根据相邻超像素之间的相似性进行近似域稀疏解混; Then, the approximate domain SU was performed according to the similarity between adjacent superpixels.
54158 最后,将近似域解混结果转换到原始域并结合实际像素光谱进行原始域的逐像素精确解混。 Finally, the approximate domain unmixing result was converted to the original domain, and combined with the actual pixel spectrum to perform accurate pixel-by-pixel unmixing of the original domain.
54159 实验结果表明,本文所提出的算法相比同类算法有更低的解混复杂度,且具有更高的解混精度和鲁棒性。 Experimental results show that the algorithm proposed has lower unmixing complexity than similar algorithms, and has higher unmixing accuracy and robustness.
54160 机载气象雷达下视探测低空风切变时,复杂的电磁干扰及强地杂波会严重影响其对目标信号的检测,造成风场速度估计失准。 Complex electromagnetic interference and strong ground clutter will seriously affect the detection of the target signal when airborne weather radar is used to detect the low-altitude wind-shear, resulting in the inaccurate estimation of wind speed.
54161 针对上述问题,本文提出一种毫米波(millimeter wave,MMW)捷变频体制下的低空风切变风速估计方法。 To solve these problems, this paper presents a method of wind speed estimation of low-altitude wind-shear in MMW(millimeter wave) frequency agile system.
54162 该方法采用载频脉组间捷变,在每个脉组内利用雷达系统先验信息设计两维两脉冲对消(two dimensional pulse-to-pulse canceller,TDPC)预滤波器对雷达回波进行预滤波,削弱杂波功率, In this method, two dimensional pulse-to-pulse canceller(TDPC) prefilter is designed in each pulse group by using radar system prior information to prefilter radar echo and weaken clutter power.
54163 接着利用基于组合空时主通道的自适应处理(combined space-time main channel adaptive processing,CMCAP)对回波数据进行空时二维滤波,得到风切变信号的模糊多普勒估计值, Then, the combined space-time main channel adaptive processing(CMCAP) is used to filter the echo data in two dimensional space-time, obtains the Doppler ambiguity estimation value of the wind-shear signal,
54164 最后将每个脉组内的估计结果由多普勒频率域转换到速度域,采用错位差分查表的方式订正模糊速度,从而得到风场的真实速度值。 finally transforms the estimation result in each pulse group from the Doppler frequency domain to the velocity domain, uses the dislocation difference table method to revise the speed ambiguity, thus obtains the real speed value of the wind field.
54165 仿真结果分析验证了所提方法的有效性。 The simulation results show the effectiveness of the proposed method.
54166 针对时间反演系统中多个窃听者随机分布的物理层安全传输问题,提出一种安全吞吐量优化方案,该方案基于人工噪声辅助时间反演的多输入单输出(MISO)传输。 For the problem of secure transmission in physical layer with multiple eavesdroppers randomly distributed in time reversal system, a secure throughput optimization scheme is put forword. The scheme is based on MISO transmission with artificial noise-aided time reversal.