| 摘要: |
| 针对阵列天线存在系统误差的情况，在Frost结构的基础上提出了一种改进的稳健宽
带波束合成算法。该算法以信号到达角（DOA）误差为约束条件合成期望信号，并把滤波器
优化设计转化为凸优化问题，使用内点迭代法有效解决，进一步使得期望的信号响应具有一
定的波动性，从而使得更多的自由度应用在干扰和噪声的抑制上，达到优化加权制的目的。
仿真结果表明，当系统存在一定的DOA误差、幅相误差和位置误差时，所提出的宽带波束合
成算
法获得的信干噪比（SINR）比worst-case约束算法提高约1～3 dB。 |
| 关键词: 阵列天线 稳健宽带波束合成 Frost结构 DOA误差约束 |
| DOI： |
|
| 基金项目:国家自然科学基金资助项目(60972021); 国家重点基础研究发展规划
(973计划) 项目(2008BAH25B03)；创新研究群体科学基金项目(61021001) |
|
| A Robust Broadband Beamforming Algorithm Under the Constraint of DOA Error |
| CHEN Yun,HUANG Zhen |
| () |
| Abstract: |
| In view of the system errors of array antenna, a modified robust broadband a
lgorithm is designed based on the Frost structure. The basic idea of the algorit
hm is that one desired signal is composed under the constraint of direction of a
rri
val(DOA) error, and the optimization of the filters is transformed into a convex
op
timization problem, which can be effectively solved by interior point iterative
methods. Then the response of desired signal is made to have some ripple, so mor
e
degree of freedom is used to suppress the noise and interference to optimiz
e the coefficient of the filters. Simulation results show that the proposed broa
dband algorithm improves signal to interference noise ratio(SINR) 1～3 dB than
the worstcase algorithm. |
| Key words: array antenna robust broadband beamformer Frost structure constraint of DOA error |
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