干扰阻塞算法衰减区间分析及改善方法研究

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振动与冲击 ›› 2018, Vol. 37 ›› Issue (14) : 108-114.

论文

干扰阻塞算法衰减区间分析及改善方法研究

王麟煜^1.2，郑恩明1，陈新华1，黄海宁1

作者信息 +

Attenuation interval analysis of the jamming jam algorithm and its improvement

WANG Lin-yu^1.2, ZHENG En-ming¹, CHEN Xin-hua¹, HUANG Haining¹

Author information +

文章历史 +

摘要

为了抵消主瓣干扰，干扰阻塞算法被提出。该方法首先利用均匀线阵具有的相位差特点构建阻塞矩阵；然后用构建的阻塞矩阵对线阵接收数据进行阻塞预处理；最后进行波束形成将主瓣干扰去除。但该方法在抵消主瓣干扰的同时也会对线阵输出总能量、信号、噪声、信噪比造成不同程度衰减，致使不同方位波束形成输出结果差异较大，降低了对部分方位区间内目标的检测性能。为了详细分析干扰阻塞算法衰减区间，提高抗干扰性能和检测性能，文中推导了干扰阻塞算法实现原理和干扰阻塞前后总能量、信号、噪声、信噪比变化函数，论述了影响衰减区间相关因子，并提出了相应改善方法。理论分析和数据处理结果表明：干扰阻塞算法在去除主瓣干扰时，由于受衰减区间影响，无法对衰减区间内弱目标实现有效检测；改善方法通过修正因子降低了背景能量差异，减小了干扰阻塞算法衰减区间，提高了干扰阻塞算法对在方位区间内的检测性能，可对相邻干扰2°的弱目标实现有效检测。

Abstract

In order to suppress the mainlobe interferences, the jamming jam algorithm was proposed. In the method, a block matrix based on the phase difference characteristics of a uniform linear array, was constructed, by which the received data of the linear array were pretreated and then mainlobe interferences were removed by beamforming. However, when utilizing the constructed block matrix to suppress the mainlobe interferences, different degree attenuations on the total output energy, signal, noise and signal to noise ratio (SNR), may be caused, which results in fairly great differences in the beamforming output results, and the worsening of the detection performance in some azimuth interval. In order to effectively analyze the attenuation interval of the jamming jam algorithm, and improve the antijamming performance and detection performance, the basic principle of the jamming jam algorithm, was introduced, the change functions of the total output energy, signal, noise and SNR after the interferences suppression, were deduced, the related factors affecting attenuation intervals were discussed and a corresponding improvement method for the jamming jam algorithm was proposed. The theoretical analysis and data processing results show that when using the jamming jam algorithm to suppress mainlobe interferences, due to the influence of attenuation interval, the weak targets in the attenuation interval will not be detected effectively. The improvement method can effectively achieve the detection of the weak targets with adjacent interference 2° by reducing the attenuation interval and the difference in output background energy, and the detection performance of the jamming jam algorithm is raised.

导出引用

王麟煜1.2，郑恩明1，陈新华1，黄海宁1. 干扰阻塞算法衰减区间分析及改善方法研究[J]. 振动与冲击, 2018, 37(14): 108-114

WANG Lin-yu1.2, ZHENG En-ming1, CHEN Xin-hua1, HUANG Haining1. Attenuation interval analysis of the jamming jam algorithm and its improvement[J]. Journal of Vibration and Shock, 2018, 37(14): 108-114

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