| 摘要 |
PROBLEM TO BE SOLVED: To improve performance of a multiple phase and/or multiple amplitude receiver such as a 64/256 quadrature amplifier(QAM) receiver under one and plural echoes. SOLUTION: A moving window adaptive decision feedback equalizer (DFE) is given according to Cn(k+1)=Cn(k)-W(k)E(k)Xn(k). A delta indicates a step size, the Cn indicates a tap value of the number of taps (n), the E(k) indicates an error output at a time (k), the Xn(k) indicatess a reception signal to a front cursor tap (FFE) and a past decision output to a back cursor tap (DFE) and the W(k) indicates a sliding window function. In adaptive processing, some coefficients are fixed while others are adjusted. Only by adjusting these taps, interference or a noise is not introduced into a decision device of a digital receiver. |
