摘要
研究了信号最优极化滤波问题,以信号干扰噪声比(SINR)为目标函数建立了带非线性约束的优化模型,利用变量代换将其转化为无约束的优化问题,利用极值必要条件将优化问题转化为一元二次方程求根问题,导出了最大SINR和最优接收极化的解析表达式。性能分析表明:信号和干扰极化状态差异越大,滤波性能越好,完全极化干扰容易被抑制,而部分极化干扰效果好。
The optimal polarization filtering is investigated, which can be described as optimization with a nonlinear restriction. The nonlinear restriction is removed through an intermediary variable. According to the extremum necessary condition, the optimization is further transformed into problem of rooting a unitary quadratic equation. Consequently, the maximal SINR is the bigger root of the unitary quadratic equation and the optimal receiving polarization is obtained. The filtering performance is improved with the difference increasing in polarization domains between the desired signal and interference. The completely polarized interference can be suppressed easily and the partially polarized interference is difficult, to be suppressed.
出处
《电子与信息学报》
EI
CSCD
北大核心
2006年第3期498-501,共4页
Journal of Electronics & Information Technology
关键词
信号处理
极化
滤波
信号干扰噪声比
最优化
Signal Processing, Polarization, Filtering, Signal to Interference plus Noise Ratio （SINR）, Optimization
