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

在数字通信系统中，在高传输速率下，通信信道经常受到非线性码间干扰的影响。此外，免提固定移动无线电话或电话会议系统的回波消除系统受到非线性扬声器特性的影响。为了克服上述问题，经常使用Volterra级数展开所呈现的Volterra系统，它被称为泰勒级数模型的推广。此外，为了减少计算量，我们采用了阵列天线技术。在本课题中，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波消除器，并通过计算机仿真验证了算法的有效性。其次，为了考虑输入信号不可用的实际情况，我们构建了盲时空回声消除和均衡器。设计了基于混合单纯形遗传算法的优化算法，将单纯形算子与遗传算法相结合来解决优化问题，并通过计算机仿真验证了算法的有效性。

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.