工业控制计算机
工業控製計算機
공업공제계산궤
INDUSTRY CONTROL COMPUTER
2015年
5期
130-131,134
,共3页
回声消除%成比例%自适应滤波
迴聲消除%成比例%自適應濾波
회성소제%성비례%자괄응려파
echo cancel ation%proportionate%adaptive filtering
针对lP电话中回声路径稀疏冲激响应的结构特征，分析比较了四种成比例自适应算法的性能。结果表明：在稀疏回声路径条件下Sc－MPNLMS算法与MPNLMS算法性能相当，要优于lPNLMS算法和PNLMS算法；而在色散回声路径条件下Sc－MPNLMS算法与lPNLMS算法性能相当，要优于MPNLMS算法和PNLMS算法。
針對lP電話中迴聲路徑稀疏遲激響應的結構特徵，分析比較瞭四種成比例自適應算法的性能。結果錶明：在稀疏迴聲路徑條件下Sc－MPNLMS算法與MPNLMS算法性能相噹，要優于lPNLMS算法和PNLMS算法；而在色散迴聲路徑條件下Sc－MPNLMS算法與lPNLMS算法性能相噹，要優于MPNLMS算法和PNLMS算法。
침대lP전화중회성로경희소충격향응적결구특정，분석비교료사충성비례자괄응산법적성능。결과표명：재희소회성로경조건하Sc－MPNLMS산법여MPNLMS산법성능상당，요우우lPNLMS산법화PNLMS산법；이재색산회성로경조건하Sc－MPNLMS산법여lPNLMS산법성능상당，요우우MPNLMS산법화PNLMS산법。
To deal with this structure characteristic of sparse impulse response in lP echo cancel atio,four proportionate NLMS al-gorithms are summarized in this paper.Simulation results show sparseness control ed MPNLMS (Sc-MPNLMS) algorithm ob-tains a faster convergence rates than lPNLMS algorithm in sparse circumstances.Moreover,Sc-MPNLMS algorithm obtains a faster convergence rates than MPNLMS algorithm in dispersive circumstances,and has the same performance with their con-ventional counterparts for situation of sparse channel.
