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Description: 主要 研 究 用于声音通讯系统中的声回波抵消技术。声回波抵消通常采用声回波抵
消器来实现。具体方法是用自适应滤波器来估计回波信号，并从麦克风信号中减掉该
估计值，从而实现声回波的抵消。回波抵消器中常用的几种自适应滤波算法有LMS,
NLMS, RLS等算法。对现有主要算法的性能进行了分析，并对优缺点进行评价和比
较。为了在收敛速度和运算量之间得到很好的折衷，对NLMS算法改进，得到了
PNLMS算法，对传统的快处理块算法改进，得到了精确块算法。综合两个算法，获
得了一种基于回波路径冲击响应稀疏性和精确块技术的自适应算法(BEPNLMS),
并对该算法作了详细的分析和研究。针对具体应用以及DSP芯片的特点，结合
BEPNLMS算法，给出了一种基于TMS320VC5402 DSP实现回波抵消的软硬件设计
方案。对主要模块电路的设训作了详细介绍，画出了自适应算法和语音检测流程图，
写出了各模块程序的主要部分。最后，对新算法的收敛性和计算复杂度等主要性能作
了验证，说明本算法可行并满足各项指标要求。
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Size: 2842993 |
Author: hbeishang |
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Description: 主要 研 究 用于声音通讯系统中的声回波抵消技术。声回波抵消通常采用声回波抵
消器来实现。具体方法是用自适应滤波器来估计回波信号，并从麦克风信号中减掉该
估计值，从而实现声回波的抵消。回波抵消器中常用的几种自适应滤波算法有LMS,
NLMS, RLS等算法。对现有主要算法的性能进行了分析，并对优缺点进行评价和比
较。为了在收敛速度和运算量之间得到很好的折衷，对NLMS算法改进，得到了
PNLMS算法，对传统的快处理块算法改进，得到了精确块算法。综合两个算法，获
得了一种基于回波路径冲击响应稀疏性和精确块技术的自适应算法(BEPNLMS),
并对该算法作了详细的分析和研究。针对具体应用以及DSP芯片的特点，结合
BEPNLMS算法，给出了一种基于TMS320VC5402 DSP实现回波抵消的软硬件设计
方案。对主要模块电路的设训作了详细介绍，画出了自适应算法和语音检测流程图，
写出了各模块程序的主要部分。最后，对新算法的收敛性和计算复杂度等主要性能作
了验证，说明本算法可行并满足各项指标要求。-err
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Size: 2842624 |
Author: hbeishang |
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Description: 回波抵消器中常用的几种自适应滤波算法有LMS, NLMS, RLS等算法。对现有主要算法的性能进行了分析，并对优缺点进行评价和比较。为了在收敛速度和运算量之间得到很好的折衷，对NLMS算法改进，得到了 PNLMS-Echo cancellation devices commonly used in adaptive filtering algorithm has several LMS, NLMS, RLS, such as algorithms. The main algorithm of the existing performance analysis, and evaluation and comparison of the advantages and disadvantages. For the convergence between computing speed and a good compromise on the NLMS algorithm improvements have been PNLMS
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Size: 28672 |
Author: 东 |
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Description: 回波抵消器中常用的几种自适应滤波算法有LMS, NLMS, RLS等算法。对现有主要算法的性能进行了分析，并对优缺点进行评价和比较。为了在收敛速度和运算量之间得到很好的折衷，对NLMS算法改进，得到了 PNLMS-Echo cancellation devices commonly used in adaptive filtering algorithm has several LMS, NLMS, RLS, such as algorithms. The main algorithm of the existing performance analysis, and evaluation and comparison of the advantages and disadvantages. For the convergence between computing speed and a good compromise on the NLMS algorithm improvements have been PNLMS
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Size: 181248 |
Author: 东 |
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Description: This work shows a PNLMS-based algorithm that incorporates other techniques for PNLMS to be less complex. MMax, SAG and Power-of-Two Quantization are considered in this hybrid of algorithms.
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Size: 143360 |
Author: mocordel |
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Description: 由于通常的通信信道的冲激响应的稀疏性，使得NLMS算法的收敛速度还有待提高。所以，近年来，有学者提出了成比例的归一化的均方误差算法(PNLMS)。PNLMS在自适应过程的开始阶段有着很快的收敛的速度，但是迭代过程越往后，收敛速度越慢。于是，众多学者提出了许多的改进算法。本程序是通过matlab仿真对近年来流行的PNLMS,IPNLMS,MPNLMS等算法进行的仿真程序-As usual communication channel impulse response sparse, making the convergence rate of NLMS algorithm to be improved. Therefore, in recent years, some scholars have proposed a proportional to the normalized mean square error algorithm (PNLMS). PNLMS the beginning of the adaptive process has a fast convergence speed, but the more backward iterative process, convergence slower. Thus, many scholars have made many improvements in algorithms. Matlab simulation of this program is popular in recent years PNLMS, IPNLMS, MPNLMS other algorithms of the simulation program
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Size: 8192 |
Author: 龚霞 |
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Description: 回声消除系统使用自适应滤波器模拟回声信道，自适应滤波器的阶数对回声消除效果具有重要的影响，合适的阶数可以提高回声消除效果。通过回声消除仿真对比实验显示，本算法的滤波器失准系数低于 NLMS、PNLMS 算法。-The echo cancellation system uses an adaptive filter to simulate the echo channel. The order of the adaptive filter has an important effect on the echo cancellation effect. The appropriate order can improve the echo cancellation effectThe experimental results show that the algorithm has no less than NLMS and PNLMS algorithm..
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Size: 742400 |
Author: 欧阳 |
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