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我们将衰落信道做为具有某一脉冲响应的传输信道,并假设在该信道中由于衰落之故,使脉冲响应发生随机变动。本文即对该模型推导出控制理论中的状态方程式及观测方程式。从而利用卡尔曼滤波器从给定的参数矢量α~(ι)(ι=1,…N)中得出现在的脉冲响应图形,这是根据利用卡尔曼滤波器所产生的新序列γ_k~(ι)计算各种L的后验概率P_k~(ι)进行的。进而,根据这一后验概率P_k~(ι)及状态估算矢量(?)_k~ι,从由于受到符号间干扰而产生失真并有加性噪声的接收信号中提取发射信号。本文介绍的就是这样的自适应接收理论,并根据这一理论进行计算机模拟,以确认该理论的正确。
We consider the fading channel as a transmission channel with an impulse response and assume that the impulse response changes randomly due to fading in the channel. This paper deduces the state equation and observation equation in the control theory. The Kalman filter is used to derive the current impulse response graph from a given parameter vector α ~ (ι) (ι = 1, ... N) according to the new sequence γ_k ~ ι) to calculate the posterior probability of various L P_k ~ (ι) carried out. Further, based on this posterior probability P_k ~ (i) and the state estimation vector (?) - k ~ i, the transmitted signal is extracted from the received signal which is distorted by the intersymbol interference and has additive noise. This article describes such an adaptive reception theory, and computer simulation based on this theory to confirm the theory is correct.