EI / SCOPUS / CSCD 收录

中文核心期刊

一种简单的抗强干扰自适应波束成形方法

A SIMPLE METHOD OF ADAPTIVE BEAMFORMING FOR SUPRESSING STRONG INTERFERENCE

  • 摘要: 本文讨论在有强点源干扰时的自适应波束成形问题。利用频域上最佳传输函数的表达式,证明了在仅有强点源干扰时,最佳传输函数有一个简单的标准形式。它等于干扰和期望信号的指向性矢量的加权和,其加权系数可以很容易地由解一个线性方程组给出。这个线性方程组的阶数等于强干扰的个数加1。
    文中给出系数矩阵的计算方法。本文提出的方法不需要迭代运算,而只需实时地解一个低阶的线性方程组。从而使Widrow提出的自适应波束成形方法大大地简化了。
    实际的数值计算说明,用本文提出的方法进行波束成形效果是好的。文中给出了部分例子及计算结果。

     

    Abstract: In the traditional adaptive beamforming model proposed by widrow there are K elements and KL weight coefficients. It is necessary that each of KL weight coefficients are iterated in every sample period.
    A special situation of adaptive beamforming is considered in this paper, that is the case of strong localized interference.
    Using the optimum transfer function in frequency domain we proved that in the ease of strong localized interference there is a canonical from for optimum transfer function. It can be expressed in term of directive vector of interference and signal. The weight coefficients of those vectors can easily calculated by a linear equation, the order of this equation is equal the number of interference plus one.
    The calculation method of coefficient matrix of linear equation is given. A rapid adaptive beamforming can be obtained without iterative operation.
    The adaptive beamforming system described in this paper have considrably redused the calculation of tapped delay line.
    Some practical examples are shown.

     

/

返回文章
返回