一種沖擊噪聲環(huán)境中的二維DOA估計新方法
A Novel Method for Estimating 2-D DOA in the Presence of Impulsive Noise
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摘要: 該文提出了一種新的在沖擊噪聲環(huán)境中基于陣列輸出信號分數(shù)低階矩的二維測向方法穩(wěn)健的協(xié)變異波達方向矩陣法。該方法利用沖擊噪聲和SS過程的特點,擴展了原波達方向矩陣法的信號模型和應(yīng)用環(huán)境,對沖擊噪聲有較好的抑制作用,增強了算法的通用性和穩(wěn)健性,彌補了傳統(tǒng)的基于二階或高階統(tǒng)計量的子空間測向算法不能應(yīng)用于沖擊噪聲環(huán)境的不足,計算機仿真驗證了該算法的可行性和有效性。
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關(guān)鍵詞:
- DOA估計; 分數(shù)低階矩; 協(xié)變異; 沖擊噪聲; SS過程
Abstract: This paper presents a new fractional lower order moment-based 2-D direction finding method-robust covariation DOA matrix method in the presence of impulsive noise which can be modeled as a symmetric alpha-stable(SaS) process. The method extends signal models and application situation of original DOA matrix algorithm by exploiting the features of impulsive noise and SaS processes. The approach is robust against additive impulsive noise. It enhances universality and robustness of the algorithm, and remedies the shortcoming of the traditional subspace techniques employing both second-order and higher order moments, which cannot be applied in impulsive noise environments. The simulation results show the feasibility and effectiveness of the new algorithm. -
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