ID 原文 译文
55437 为此提出一种方位相位编码(azimuth phase coding,APC)线性调频(linear frequency modulation,LFM)波形,该波形对不同发射通道发射的线性调频信号进行相应的方位相位编码,其回波分离在方位相位解调后通过方位波束形成实现,回波间的干扰能够被充分消除。 Therefore put forward a kind of azimuth phase code (azimuth phase coding, APC) linear frequency modulation (linear frequency modulation, LFM) waveform, the waveform of different transmission channel launch of linear frequency modulation signal to corresponding bearing phase encoding, the echo separation after bearing phase demodulation by azimuth beam forming, echo between the interference can be fully eliminated.
55438 可用于高度维多发多收合成孔径雷达系统,提高多基线干涉SAR(interferometric SAR,InSAR)的干涉测高精度或三维成像的高度维成像性能。 Can be used for high dimensional multiple synthetic aperture radar system, and improve the multiple baseline interference SAR (interferometric SAR, InSAR) the height of the interference of high precision measurement and 3 d imaging d imaging performance.
55439 仿真结果验证了该波形的可行性及方位波束形成回波分离方法的有效性。 The simulation results verify the feasibility of the waveform and orientation beamforming echo separation method is effective.
55440 针对Dempster方法在合成高度冲突的证据时结果与直观结论相悖的问题,提出了一种基于支持度的改进证据合成方法。 In Dempster method in the synthesis of highly conflict evidence, contrary to intuitive conclusion problems as a result, this paper proposes a improved evidence synthesis method based on support.
55441 首先根据证据之间的相似性程度判断是否存在证据冲突,对于总数在3条以上且存在冲突的证据组合,应用各证据的支持矩阵,通过其最大特征值对应的特征向量导出各证据的支持度系数,由此对基本概率分配(basic probability assignation,BPA)函数进行转化,再采用Dempster方法进行合成。 First of all, according to the degree of similarity between evidence to judge whether there is conflict of evidence, for in article 3 above and total conflict evidence combination, application support matrix of each evidence through its maximum eigenvalue corresponding eigenvector export support coefficient of each evidence of basic probability distribution (basic aim-listed probability assignation, BPA) function transformation, the synthesis by Dempster method.
55442 仿真计算结果表明,该方法能有效处理冲突证据组合,克服了一票否决问题,相对于其它几种典型改进算法具有更快的识别速度,能进一步减小识别结果的不确定性,并保留了Dempster方法满足交换律、结合律的良好特性。 The simulation calculation results show that the method can effectively deal with conflict evidence combination, to overcome the problem one ticket veto, relative to other several typical improved algorithm has faster recognition speed and can further reduce the uncertainty of the identification results, and keep the Dempster method satisfy the good characteristic of commutative law, associative law.
55443 在基于分段线性模型的正交频分复用(orthogonal frequency division multiplexing,OFDM)时变信道估计中,存在模型参数估计精度受到载波间干扰(inter-carrier interference,ICI)影响的问题。 Based on piecewise linear model of orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) time-varying channel estimation, the model parameters estimation precision is exist intercarrier interference (Intel - carrier interference, ICI) effect.
55444 为此,本文采用ICI自消除技术,抑制了导频子载波的ICI,改善了模型参数的估计性能。 Therefore, this article USES the ICI since removing technology, restrain the pilot subcarrier ICI, improved model parameter estimation performance.
55445 此外,还推导了单抽头Jakes信道条件下模型参数估计均方误差的表达式,理论分析表明,与基本的分段线性模型方法相比,本文方法可以使均方误差下降约13dB。 In addition, single tap was deduced Jakes channel model parameters are estimated under the condition of the expressions of the mean square error (mse), theoretical analysis shows that compared with the basic method of piecewise linear model, this article method can make the mean square error (mse) fell about 13 db.
55446 仿真结果验证了在多抽头信道和大的多普勒扩展条件下,本文方法也能明显提高ICI抑制能力,从而得到更好的系统误码性能。 Simulation results verified the in tap channel and large doppler extension condition, the method can obviously improve the ICI suppression ability, and better ber performance of system is obtained.