ID | 原文 | 译文 |
54257 | 该方法将发射端波形优化及接收端自适应滤波相结合,进一步提高雷达的干扰抑制能力。 | This method combines waveform optimization at the transmitter and adaptive filtering at the receiver to further improve the radar's interference suppression capabilities. |
54258 | 首先采用粒子群算法进行波形参数优化,在参数约束范围内最小化波形相关性,缓解虚警问题, | First, the particle swarm algorithm is used to optimize the waveform parameters to minimize the waveform similarity within the parameter constraints and alleviate the false alarm problem. |
54259 | 然后基于正交接收机内干扰的正负频谱共轭相关而目标信息仅存在于频谱正半部分的特点,通过最小均方迭代得到最优滤波器,实现自适应干扰对消。 | Then, based on the characteristics that the interference is conjugate correlated in the positive and negative spectrum and the target is only in the positive half of the spectrum, obtain the optimal filter through least mean square iteration to achieve adaptive interference cancellation. |
54260 | 仿真结果表明,该方法对多干扰有良好的抑制效果。 | The simulation verifies that this method has a good suppression effect for many kinds of interferences. |
54261 | 当空间中存在大功率主瓣干扰时,传统特征投影类干扰抑制方法存在主瓣峰值偏移、旁瓣内干扰零陷变浅等问题。 | When the mainlobe interference with high power exists in the space, the traditional interference suppression methods based on eigen-projection have some problems, such as mainlobe peak shift, shallow sidelobe notches and so on. |
54262 | 针对上述问题,本文提出一种新的基于特征子空间的主瓣干扰抑制方法。 | In view of the above problems, a new method for suppressing mainlobe interference based on eigen-subspace is proposed in this paper. |
54263 | 首先根据赤池信息准则(AIC)与相关性判别分离主、旁瓣干扰的特征矢量; | Firstly, the eigenvectors of mainlobe and sidelobe interferences are determined according to Akaike Information Criterion(AIC) and correlation discrimination. |
54264 | 其次利用特征投影预处理抑制主瓣干扰分量; | Secondly, the mainlobe interference component is suppressed by eigen-projection preprocessing. |
54265 | 最后定义新的权矢量赋形方式,在主瓣子空间约束及旁瓣干扰线性约束下进行自适应波束形成。 | Finally, by defining a new configuration method of weight vectors, adaptive beamforming is performed under the constraint of mainlobe subspace and the linear constraints of sidelobe interferences. |
54266 | 仿真实验结果表明,所提方法达到了更为稳健的方向图保型效果,获得了趋近于理想零值的干扰处零陷增益,提高了1. 3 dB以上的输出信干噪比(SINR)。 | Simulation results show that the proposed method achieves a more robust pattern preserving effect, obtains a notch gain close to the ideal zero value of each interference, and improves the output Signal to Interference plus Noise Ratio(SINR) by more than 1. 3 dB. |