ID 原文 译文
55677 最后,对所提的方法进行了实验验证,验证了算法的有效性。 Finally, the experiments have been carried out to verify the proposed method, the effectiveness of the proposed algorithm.
55678 在广义秩信号模型基础上,设计了一种鲁棒波束自适应波束形成方法。 On the basis of generalized rank signal model, we design a robust adaptive beamforming method of the beam.
55679 通过引入分数低阶变换来抑制非高斯稳定分布噪声,提出脉冲噪声环境下能够处理信号失配的鲁棒波束形成器算法,并讨论了分数低阶协方差矩阵的可逆性。 By introducing fractional lower order transform to suppress the non-gaussian noise, stable distribution under impulsive noise environment is put forward to deal with the signal mismatch of robust beamforming algorithm, and discuss the reversibility of fractional low-order covariance matrix.
55680 由于采用Frobenius范数建立明确的模型来刻画期望阵列响应与数据的协方差矩阵之间的不确定性,因此所提算法具有解析闭合形式解。 Because the Frobenius norm is adopted to establish the model of clear expectations array response with the data covariance matrix between the uncertainty, so the proposed algorithm has closed form solutions.
55681 仿真结果表明:与传统波束形成算法相比,所提算法在脉冲稳定分布噪声和信号失配同时存在的情况时具有更好的鲁棒性。 Simulation results show that compared with the traditional beamforming algorithm, the proposed algorithm in the stable distribution noise and pulse signal mismatch are exist at the same time has a better robustness.
55682 针对使用定向天线的协作通信系统,对固定译码转发协议(decode-and-forward protocol,DF)的误符号率(symbol error rate,SER)性能进行探索性研究。 In view of the collaborative communication system using a directional antenna, the fixed decoding forwarding protocol (decode - and - forward protocol, DF) of symbol error rate (symbol error rate, SER) performance for exploratory research.
55683 首先建立了基于定向天线的DF协作通信系统模型,从理论上推导出该模型下的SER闭式表达式,确定SER上界,并以SER为优化目标分析最优功率分配问题,最后结合具体的数值仿真对所建立模型的SER性能进行详细分析比较。 First established a model of DF cooperative communication system based on directional antenna, the model is deduced theoretically under the SER closed expression, determine the upper and lower bounds of the SER, and SER as optimization target analysis, the optimal power allocation problem, the numerical simulation of concrete on the detailed analysis and comparison the SER performance of the model.
55684 结果表明,在使用定向天线的条件下,DF协作通信系统的SER更小,系统性能优劣与各节点定向增益、信道质量和功率分配方式密切相关,最优功率分配比平均功率分配性能更优。 Results show that under the condition of using the directional antenna, SER smaller DF cooperative communication system, system performance and directional gain all nodes, and the way of power distribution is closely related to the quality of channel, the optimal power allocation performance is better than the average power distribution.
55685 提出一种新的连续波(continuous waveform,CW)体制合成孔径雷达(synthetic aperture radar,SAR)成像方法。 Put forward a new continuous wave (continuous waveform, the CW) system of synthetic aperture radar (synthetic aperture radar, SAR) imaging methods.
55686 有别于脉冲波形SAR和调频连续波SAR通过发射宽带信号获得高距离分辨率,CW-SAR成像利用CW波形的高多普勒分辨率进行成像,通过将回波信号与尺度变换后的发射信号进行相关构造成像数据模型,该相关信号实际为场景散射系数在等多普勒线上的投影,基于该相关信号,采用滤波反投影图像重建算法进行场景反射率重建。 Is different from the pulse waveform SAR and frequency modulation continuous wave SAR by emitting a broadband signal to obtain high range resolution, the CW - SAR imaging using the CW waveform of high doppler resolution imaging, by will echo signal and scale transformation after the launch of signal is related to structural imaging data model, the related signal the actual scene to scattering coefficient in doppler online such as projection, based on the correlation signal, filter back projection image reconstruction algorithm is adopted to improve the reflectivity scene reconstruction.