A Design Method of Spatial and Temporal Echo Cannceler Using Correlation Algorithm

一种基于相关算法的时空回声消除器设计方法

• 批准号: 13650420
• 负责人: YAMASHITA Katsumi
• 金额: $ 2.5万
• 依托单位: Osaka Prefecture University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13650420/
• 关键词: Echo canceler; Double-talk problem; Correlation algoritmm; Array antenna; Equalizer design; Volterra series; High order cumulant; Blind identification; 等化器設定; 到来角推定

In the digital communication systems, the communication channels are often impaired by the nonlinear intersymbol interference that often arises at high transmission rate. Also, the echo canceling systems for hand-free set mobile radio telephone or tele-conferecing system are impaired by the nonlinear speaker characteristics.In order to overcome the above-mentioned problem, the Volterra system presented by the Volterra series expansion that is wett known as a generalization of the Taylor series model is often used. Also, in order to reduce computational load, we use array antenna technique.In this project, we designed nonlinear equalizer and echo canceler based on Volterra model and array antenna technique, and the validity of the proposed algorithms was demonstrated by using computer simulations. Next, we constructed blind spatial and temporal echo canceler and equalizer in order to consider practical situations that the input signals are unavailable. These algorithms were designed based on hybrid simplex genetic algorithm which solves the optimization problem by incorporating the simplex operator with GA , and the validity of the proposed algorithms was demonstrated by using computer simulations.

在数字通信系统中，通信信道经常受到高传输速率下经常出现的非线性码间干扰的损害。另外，用于免提移动无线电话或电话会议系统的回声消除系统会受到非线性扬声器特性的损害。为了克服上述问题，通常使用由Volterra级数展开提出的Volterra系统，该系统被称为泰勒级数模型的推广。同时，为了减少计算量，我们采用了阵列天线技术。在本项目中，我们基于Volterra模型和阵列天线技术设计了非线性均衡器和回声消除器，并通过计算机仿真验证了所提算法的有效性。接下来，我们构建了盲空间和时间回声消除器和均衡器，以考虑输入信号不可用的实际情况。这些算法是基于混合单纯形遗传算法设计的，该算法通过将单纯形算子与遗传算法相结合来解决优化问题，并通过计算机仿真证明了所提算法的有效性。

项目成果

宮城隼夫, 范一平, 山下勝己: "合成演算子を用いたファジィ関係式の解法"電気学会論文誌C. 121-C・4. 756-761 (2001)

Hayao Miyagi、Ippei Fan、Katsumi Yamashita：“使用组合运算符的模糊关系表达式的解决方案”日本电气工程师学会会刊 C. 121-C・4（2001 年）。

Y.W. Chen, S. Narieda and K. Yamashita: "Blind Nonlinear Channel Identification Based on a Constrained Hybrid Genetic Algorithm"IEEE Trans, on Instrumentation and Measurement. (in press).

Y.W.

K.Watanabe, YW.Chen, K.Yamashita: "Blind Nonlinear Channel Identification Using 4th-order Cumulant Constraint"Proc. of Int. Conf. on Knowledge-Based Intelligent Information Eng. Syst., Osaka. 1258-1262 (2001)

K.Watanabe、YW.Chen、K.Yamashita：“使用四阶累积量约束的盲非线性通道识别”Proc。

Katsumi Yamashita: "Fractionally Spaced Bayesian Decision Feed-back Equalizer"IEICE Trans. on Fundamentals. Vol.E86-A No.1. 215-220 (2003)

Katsumi Yamashita：“分数间隔贝叶斯决策反馈均衡器”IEICE Trans。

渡邉 勝秀: "アダプティブアレーアンテナを用いた時空間RBF等化器の一設計法"電気学会論文誌C. Vol.122 No.8. 1286-1292 (2002)

Katsuhide Watanabe：“使用自适应阵列天线的时空 RBF 均衡器的设计方法”，日本电气工程师学会会刊 C. Vol.122 No.8 (2002)。