色噪声环境下信源数目估计的线性插值法  

Linear interpolation for detecting the number of sources in colored noise

作　　者：张杰[1] 廖桂生[1] 王珏[2] 

机构地区：[1]西安电子科技大学雷达信号处理国家重点实验室,陕西西安710071 [2]西安电子科技大学应用数学系,陕西西安710071

出　　处：《电路与系统学报》2006年第3期62-65,共4页Journal of Circuits and Systems

基　　金：国家自然科学基金(60172028);高等学校博士点专项基金(20010701008);教育部科学技术研究重点基金资助项目(01163)

摘　　要：为了减轻加性色噪声对信源数目估计性能的影响,本文提出了一种基于相干矩阵特征值分布曲线线性插值的信号检测方法。构造适当的代价函数,避免了对数似然函数的使用,该方法对色噪声协方差矩阵特征值分散具有稳健性,同时具有较低的计算复杂度和适用于相关甚至相干源等优点。其有效性由大量的计算机仿真结果得到了验证。In this paper, a linear interpolation method to detect the number of sources impinging on an array is proposed, of which aims to alleviate the effect of colored noise on its performance. An appropriate cost function is constructed which avoids the use of the logarithm likelihood function that is lack of robust to the noise correlation, moreover, our method have many advantages such as, low complexity, suitable for coherence signals, etc. Simulations demonstrate the effectiveness of our method from different aspects with comparisons with traditional ones.

关 键 词：信号检测 AIC准则 MDL准则 线性插值 相干源 

分 类 号：TN911.7[电子电信—通信与信息系统]