Method for error recognition of a digital bit data stream transmitted by a transmitter to a receiver

US5850405A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Bernhard Wimmer · Hersbruck, DE
• Fritz Seytter · Hersbruck, DE

Key dates

• Filing date: Oct 23, 1996
• Grant date: Dec 15, 1998
• Expiry date: Oct 23, 2016

Classification

• Technology area (CPC H): Electricity
• CPC primary: H03M13/09
• WIPO field: Basic communication processes
• WIPO sector: Electrical engineering

Abstract

In a method for error recognition of a digital bit data stream transmitted by a transmitter to a receiver, a digital bit data stream coded with a convolution coder is quantized to hard bit values. The hard bit values are read in in a forward feedback-coupled inverse shift register that is inverse to the generator shift register used for the coding, and yield a first result word. In a chronologically reversed sequence, the bit data stream is read into a reverse feedback-coupled inverse shift register, which yields a second result word. The two result words are exclusive OR-combined with one another in the same time orientation to form an error syndrome. The error syndrome indicates a set of possibly faulty bit positions in the bit data stream. A transmission rate that is increased in relation to known methods results, since apart from the tail bits, which are used anyway, no additional redundancy is required for the error handling.