陣列單元取向?qū)OA估計的影響

【摘要】針對以往DOA估計算法中智能天線系統(tǒng)的陣列單元模型多采用全向振子的情況，分析了當(dāng)天線單元存在方向性時對MUSIC算法估計信號到達(dá)角的影響，并在進(jìn)行陣元互耦校正后，討論了影響MUSIC算法分辨率的一些因素，通過計算機(jī)仿真結(jié)果的比較表明單元取向、陣列方向性、信噪比對到達(dá)角分辨率有較大的影響。
關(guān) 鍵 詞 智能天線; 信號到達(dá)角; 分辨率; MUSIC算法

Many DOA estimation algorithms, reported in the past literature, are presented and used with the problem that the elements of smart antenna arrays are usually of no direction. The paper analyzes the influence to DOA estimation by MUSIC algorithm when the antenna elements have direction. The effect of mutual coupling is calibrated and some factors that influence the DOA resolution are analyzed. The simulation results are compared and the conclusion is reached that element direction, the direction of array and SNR have great effect on DOA resolution.