ID 原文 译文
39146 与目前常用的滤波器设计抗干扰方法不同，CC-MCPC信号是从波形设计的角度出发，采用具有良好伪随机性的混沌序列对时域中的每个符号进行编码，频域中采用巴克码对每个子载波进行编码。 Different from the filter design approaches, which are most popular used currently, CC-MCPC is carried on the perspective of waveform design, adopts chaotic sequences with good pseudo-randomness to code each symbol in the time domain and the Barker code to code each subcarrier in the frequency domain.
39147 载波编码增加了雷达波形脉冲的伪随机性，降低了雷达回波与间歇采样干扰的相关性，从而有效地抑制了假目标的干扰。 The coded carriers increase the pseudo-randomness of the radar waveform pulse and reduce the correlation between the radar echo and the interrupted sampling jamming, thereby effectively suppressing the interference of the false target.
39148 CC-MCPC与常用滤波器设计方法互不冲突，可叠加使用。 CC-MCPC signal is an effective complement to the commonly used filter design method.
39149 本文设计了两个仿真实验，验证了CC-MCPC的有效性和可行性。 In the experiments, two simulations are designed to verify the effectiveness and feasibility of CC-MCPC signal.
39150 实验结果表明，在文中所述的典型参数下，CC-MCPC信号与传统的MCPC信号和LFM信号相比，CC-MCPC信号经脉冲压缩后的SJR改善因子优化了1～1.5 dB。 The experiment results show that the SJR improvement factor value of the CC-MCPC signal is optimized by nearly 1～1.5 dB after the pulse compression in the anti-ISRJ experiment compared with the traditional MCPC signal and LFM signal under the typical parameters described in the paper.
39151 线性调频(Linear Frequency Modulation，LFM)信号作为一种具有大时宽带宽积的信号被广泛应用于主动声纳中以进行水下目标方位估计。 As a kind of signal with large time-bandwidth product, linear frequency modulation(LFM) signal is widely used in active sonar for underwater direction of arrival(DOA) estimation.
39152 分数阶傅里叶变换(Fractional Fourier Transform，FRFT)技术对LFM信号分析具有独特的优势，本文通过对FRFT的理论研究，分析其应用于水下多目标方位估计领域的可行性。 Fractional Fourier Transform(FRFT) has unique advantages for LFM signal analysis. In this paper, the feasibility of its application to the field of underwater multi-targets DOA estimation is explored based on the theory of FRFT.
39153 对于FRFT最优阶次搜索中存在的误差影响，本文研究范数约束Capon波束形成技术(Norm Constrained Capon Beamforming，NCCB)，利用NCCB算法提高FRFT预处理后的目标方位估计的稳健性。 For the possible increased errors of optimal order searching in the FRFT, norm constrained Capon beamforming(NCCB) is studied in this paper, and it is used to improve the robustness of the DOA based on FRFT preprocessing.
39154 最后，本文将分数阶预处理与稳健波束形成算法结合，通过计算机仿真验证了基于FRFT预处理的NCCB算法在低信噪比环境下仍然可以实现水下多目标方位的稳健估计。 Finally, fractional order preprocessing and robust beamforming algorithm are combined in the paper. Computer simulation proves that the NCCB based on FRFT preprocessing can still achieve robust underwater multi-targets DOA estimation in low SNR.
39155 语音增强在语音信号处理领域举足轻重，其目的在于减少背景噪声对语音信号的影响。 As an important application of speech signal processing, speech enhancement aims to reduce the influence of background noise on speech signals.