| 摘要 |
a channel equalization filter part(21) inputting a signal(Vk) transmitted through a transmission channel and a filter coefficient(CF), and performing the channel equalization of the signal(VK) according to the filter coefficient, and outputting the channel-equalized signal as an output signal; a viterbi decoder(25) detecting an error signal by inputting the output signal of the channel equalization filter part; a confidence counter(26) inputting the error signal from the viterbi decoder(25), and comparing the error signal with a threshold value(VTH) and outputting a selection signal(SE) according to the result of the comparison; an error calculation part(24) inputting the input signal(VK) and a training sequence(IT) of a transmitter and outputting the difference value between the two signals as an error value; a multiplier(23) multiplying the output signal of the error calculation part(24) by deltavalue according to the selection signal(SE) of the confidence counter(26); and a filter coefficient renewal part(22) obtaining the filter coefficient(CF) by inputting the output signal of the multiplier(23) and outputting the filter coefficient to the channel equalization filter part(21). |
