Patent ID: 7123653

Claim:
A blind decision feedback equalization apparatus, comprising: main filtering means for performing a blind decision feedback equalization on a baseband signal x[k] and outputting a filtered signal y[k], wherein the k is a time index; SAG flag determining means for determining a SAG flag f[k] by using a Stop-And-Go (SAG) algorithm based on the filtered signal y[k] and a detected symbol d[k], wherein the detected symbol d[k] is generated by quantizing the filtered signal y[k]; and blind decision feedback controlling means for selecting one of the filtered signal y[k] and the detected symbol d[k] as a feedback signal according to the SAG flag f[k] and feeding the feedback signal back to the main filtering means, wherein the main filtering means includes a feedforward filtering means and a feedback filtering means and updates tap coefficients of main filtering means according to the SAG flag f[k] and performing the blind decision feedback equalization based on the tap coefficients and the feedback signal.