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

US4701873A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventor

• Heinrich Schenk · Munich, DE

Key dates

• Filing date: Dec 14, 1984
• Grant date: Oct 20, 1987
• Expiry date: Dec 14, 2004

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L25/03038
• WIPO field: Basic communication processes
• WIPO sector: Electrical engineering

Abstract

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.