Method and a circuit arrangement for digital signal processing utilizing adaptive transversal filter techniques

摘要

For digital signal processing with a transversal filter having a (N-1) stage delay chain which is fed at its input with the digital signal to be processed and is provided with taps, subsum signals are stored which correspond to the N/w consecutive groups of, in each case A. sup.w possible combinations of, in each case, w consecutive, A-value tapped signal elements, where the subsum signals are formed from tapped signal elements which are each assigned to a group and are evaluated in accordance with the relevant filter setting. During each delay stage, in accordance with the relevant N/w actual combinations tapped elements, the associated subsum signals are successively read from a memory and added to one another to form an output signal element. The subsum signals can be iteratively formed in that each of the successively-read subsum signals, combined with a correction value, forms a corrected subsum signal which is stored in place of the read subsum signal as a new subsum signal.