Method for error recognition of a digital bit data stream transm

Details Method for error recognition of a digital bit data stream transm Method for error recognition of a digital bit data stream transm

1996-10-23

1998-12-15

Elmore, Reba I.

Excavating

371 431, G06F 1110

Patent

active

058504052

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.

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Hagenauer et al; The Perfromance of Rate-Compatible Punctured Convolutional Codes for Digital Mobile Radio; IEEE Trans. on Communications, Col. 38, No. 7; pp. 966-980, Jul. 1990.
Hagenauer; Rate-Compatible Punctured Convolutional Codes (RCPC Codes) and their Applications; IEEE Trans. on Communications, vol. 36, No. 4; pp. 389-400, Apr. 1988.

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