摘要
提出一种嵌套复合阵恒定束宽自适应波束形成的多率子带实现方法.复合阵以处理一倍频程的多个均匀间距的线性子阵嵌套组成,多率子带的实现以通用参数滤波器组为基础.每个子阵根据所处理的子带信号带宽不同而选择不同的加权数目.这种结构的阵列处理器不仅实现了将宽带信号分解成多个较窄的子带信号来并行处理,还使每个子阵工作在较低的采样速率下,降低了处理器算法的运算量,提高了波束形成器的权值更新速度.仿真结果表明,此结构的处理器能实现恒定束宽波束形成.
A multirate method for constant beamwidth adaptive beamforming of harmonic nested array was proposed. The harmonic nested array was composed of several uniform space linear subarrays which respond one octave signal respectively. The multirate suhband was implemented by general parameter filter banks. The number of weights of each subarray was various resulted from different subbands. Splitting wideband signal into several narrow subbands which running in parallel, and each subarray runs in lower rate were implement in this structure, which contributes to decrease the computational load much lower and to advance the update speed of weights. Simulations show that the beamformer is competent for constant beamwidth beamforming.
出处
《西南师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2009年第4期178-182,共5页
Journal of Southwest China Normal University(Natural Science Edition)
基金
四川省科技厅项目资金资助(2008ZR0162)
关键词
波束形成
嵌套复合阵
多率方法
恒定束宽
beamforming
harmonic nested array
multirate
constant beamwidth
