Adaptive Filter Research

• Main Authors: Jou ,Iong-Chin, 周雍欽
• Other Authors: Chang,Yuh-Huu
• Format: Others
• Language: zh-TW
• Published: 1996
• Online Access: http://ndltd.ncl.edu.tw/handle/90256019297485384728

碩士 === 中原大學 === 電子工程學系 === 84 === In the areas of radar , communication and biomedical engineer- ing , it is desired to enhance or notch sinusoidal signal from broadband noise . This task is usually achieved by adaptive line enhancer (ALE) or adaptive notch filter (ANF).Generally speaking , the IIR filter is more computationally efficient and has bett- er statistical performance than the FIR filter for this noisy sinusoidal signal detection.Generally speaking , the IIR filter is more computationally efficient and has better statistical performance than the FIR filter for this noisy sinusoidal sig- nal detection. Unfortunately most higher order IIR filter have a number of drawback , such as : convergence to biased or local minimum solution,slower convergence and difficult to analyze. The propo- sed adaptive first order IIR filter not only overcome these pro- blem but also isn't affected by initial weight selecting . It is inherently stable with high convergence rate. Asymptotically valid expressions for the bias and mean square error are derived for proposed algorithm . The analysis and sim- ulation of this dissertation verifies the excellent performance of the proposed structure , that is , small bias and mean square error in frequency estimate of the sinusoidal signal .