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    • 9. 发明申请
    • APPARATUS FOR EQUALIZING DECISION FEEDBACK BASED ON CHANNEL PROPERTIES CHANGE AND METHOD THEREFOR
    • 基于通道特性的决策反馈均衡设备的改进及其方法
    • WO2007049841A1
    • 2007-05-03
    • PCT/KR2005/004542
    • 2005-12-26
    • ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEPARK, Sung-ikKIM, Seung-wonLEE, Soo-inKIM, Hyoung-namLEE, You-seok
    • PARK, Sung-ikKIM, Seung-wonLEE, Soo-inKIM, Hyoung-namLEE, You-seok
    • H04B3/04
    • H04L25/03057H04B3/04H04L25/0212H04L2025/0349H04L2025/03617
    • Provided is a decision feedback equalization apparatus including a channel estimation unit for estimating a channel on received signal based on the received signal and a training sequence; a channel matched filter for maximizing SNR from the channel estimated by the channel estimation unit to change channel characteristic of the received signal; a noncausal filter for approximating the channel changed by the channel matched filter from nonminimum phase channel to minimum phase channel; an equalizer input signal storage unit for storing received symbols passed through the channel matched filter and the noncausal filter; a channel equalization unit for performing a decision feedback equalization through filtering of a signal passed through the channel matched filter and the noncausal filter; a Trellis decoder for detecting symbol from a signal channel-equalized by the channel equalization unit; a mode selection unit for selecting a specific mode; an error signal calculator for comparing an output signal of the mode selected by the mode selection unit with an output signal of the channel equalization unit to calculate an error signal; and a tap coefficient updater for updating tap coefficients to the channel equalization unit by using the error signal from the error signal calculator, an output signal from the storage unit, and an output signal from the Trellis decoder .
    • 提供了一种判决反馈均衡装置,包括:信道估计单元,用于基于接收信号和训练序列估计接收信号上的信道; 信道匹配滤波器,用于使由信道估计单元估计的信道的SNR最大化,以改变接收信号的信道特性; 用于近似由信道匹配滤波器从非最小相位信道改变到最小相位信道的信道的非因果滤波器; 均衡器输入信号存储单元,用于存储通过信道匹配滤波器和非因果滤波器的接收符号; 信道均衡单元,用于通过对通过信道匹配滤波器和非因果滤波器的信号进行滤波来执行判决反馈均衡; 用于从信道均衡单元均衡的信道中检测符号的网格解码器; 模式选择单元,用于选择特定模式; 误差信号计算器,用于将由模式选择单元选择的模式的输出信号与信道均衡单元的输出信号进行比较,以计算误差信号; 以及抽头系数更新器,用于通过使用来自误差信号计算器的误差信号,来自存储单元的输出信号和来自网格解码器的输出信号来更新抽头系数到信道均衡单元。