有记忆非线性信道的自适应估计

Adaptive Estimation of Nonlinear Channels With Memory

利用非线性差分方程作为有记忆非线性信道的估计模型。根据正交估计原理和快速正交算法,利用非线性信道的输入和输出序列可以迅速估计出该差分方程的基向量和权系数。我们提出的非线性信道估计器的结构使其具有较好的自适应能力。模拟结果表明,对弥散非线性电话信道的估计均方误差小于0.05;对有较强非线性失真的信道,则具有更好的估计性能。实际的运算量可以减少到50％。

Nonlinear difference equattion is used for estimattion model of nonlinear channels with memory in this paper. Based on the orthogonal estimation principle and fast orthogonal algorithm, the base vectors and weight coefficients can be rapidly estimated. The nonlinear channel estimator structure proposed in this paper makes it have good adaptive ability. The simulation results show that the meansquar-error (MSE) of estimation is less than 0.05 for dispersive nonlinear telephone channels, and that it has better estimatin performance for channels with stronger nonlinear distortion. The actual operations can be reduced by 50%.