基于最小二乘自适应迭代的宽带波束形成算法

Constant Beamwidth Beamforming Algorithm Based on Adaptive Iterative Least Squares

大部分时域恒定束宽宽带波束形成算法的权值拟合运算量较大,导致实用性大大降低。本文给出一种基于最小二乘自适应迭代的恒定束宽波束形成器设计方法,同时将RLS迭代算法应用于滤波器组设计中。本文方法易于实现,不受阵形及阵元指向性限制,不受迭代步长影响,且能快速收敛。理论推导及仿真实验验证了本文方法的有效性。

Many design methods for constant beamwidth beamformer in time domain require large computation work, thus resulting in reducing practicability. This paper presents an algolrithm for the design of broadband frequency invariant beamformer based on adaptive iterative least squares method. Meanwhile, RLS adaptive method is used in the design of FIR filters. The method is easy to be implemented and has no restriction on the array geometry, element patterns and iterative step size, and has fast convergence. Theoretical analysis and simulations demonstrate the effectiveness of the method.