STABLE POLE-ZERO MODELING OF LONG FIR FILTERS WITH APPLICATION TO THEMMSE-DFE

The problem of approximating a long FIR filter by a reduced-parameter stable pole-zero filter is addressed in this paper, We derive a comput ationally efficient order-recursive algorithm that achieves this task with high accuracy, Our main emphasis is on applying this algorithm to reduce the implementation complexity of the decision feedback equaliz er's long FIR feedforward and feedback filters encountered in high-spe ed data transmission on digital subscriber loops.