ID 原文 译文
613 然后给出了考虑互耦效应的杂波模型并分析了互耦对端射阵机载雷达杂波谱以及 STAP(Space-Time Adaptive Processing)性能的影响; Then the clutter model considering mutual coupling effect is given and the influence of mutual coupling on the clutter spectrumand STAP (Space-Time Adaptive Processing) performance of end-fire array airborne radar is analyzed.
614 最后提出了一种基于杂波协方差矩阵重构的互耦效应补偿方法。 Finally, a mutualcoupling effect compensation method based on clutter covariance matrix reconstruction is proposed.
615 计算机仿真验证了所提方法的有效性。 The computer simulationverifies the effectiveness of the proposed method.
616 针对船舶动力机械装置未知时变窄带噪声的有源控制问题，基于锁相环信号跟踪生成原理，通过在锁相环中引入次级通道执行机构，推导了新的未知时变窄带噪声有源控制方法。 To tackle the problem of active cancellation of unknown and time-varying narrowband signal caused by theship power engineering equipment, an active noise control algorithm for suppressing unknown and time-varying narrowband noise is proposed based on the concept of signal tracking and generation in the phase locked loop (PLL).
617 首先，通过 EPLL(Enhanced Phase LockedLoop)环节中引入次级通道，形成基于 EPLL 的未知时变窄带噪声有源控制方法; Firstly, with theintroduction of secondary path in the enhanced phase locked loop (EPLL), an active algorithm is developed;
618 其次，通过近似分析得到其等效线性差分方程，研究了窄带噪声信号幅值和次级通道特性对算法收敛性能的影响; secondly, with the approximation analysis, the differential equation of the EPLL-based algorithm is carried out to derive its performance re-lationship with the input signal amplitude and the secondary path.
619 再次，通过引入幅值归一化和次级通道归一化改进措施，提出了基于 Pseudolinear(PL)-EPLL 的窄带噪声控制方法。 With normalizing of amplitude and secondary path, an im-proved pseudolinear (PL)-EPLL based active noise algorithm is derived.
620 相比原方法，改进算法幅值、频率/相位收敛方程的收敛特性与窄带噪声信号幅值和次级通道特性无关。 Compared to the EPLL-based algorithm, the con-vergence performance of the estimated amplitude, frequency /phase equation is independent with the amplitude of unknown narrowband signal and secondary path.
621 对不同强度分量的多频窄带噪声控制，具有较为一致的收敛速度。 Besides, the convergence performance is consistent when the noise source is com-posed of multi-frequency sinusoidal with different signal noise ratio.
622 最后，通过仿真分析，验证所提出方法的有效性。 Finally, simulations conducted validate the effectiveness of the proposed PL-EPLL based active noise control.