Übersetzung für "Burst error" in Deutsch

By bit-wise interleaving the code words, the error burst is distributed over several code words.

However, pulsed interference leads to an error burst at the output of the demodulator (15).

During transmission over a disturbed transmission channel an error burst may occur in a code word.

With the aid of a decision means either the output signal of the random error detection means or the output signal of the burst error detection means is switched to the output of the decoder.

The thus found first or second error information signal, featuring a burst error or a random error respectively, is applied to the control means which decides which measures for error correction are to be taken, whether an error correction is to take place or whether it is a matter of a non-correctable error.

The decoder shown in the drawing Figure is arranged so that a burst error up to a length smaller than 7 bits is discovered.

If the number of shifts lies between 0 and 12, it follows that a burst error has occurred at the locations of the check bits in the digital signal 11, 12 i.e. in the redundancy signal 12, and thus no correction is necessary.

Therefore, when a single error is detected, a burst error is assumed, the remaining TRAU frame is discarded and replaced by the TRAU frame sent previously.

An optimal error correcting code with which an error burst up to a length of 6 bits can be corrected is used for the block coding.

The sum of E21 and E22 form a burst error count (BST), which can be used to identify physical defects on a disc.

These concatenated codes have the disadvantage that an error burst (but no independent error) is produced after incorrect decoding of the inner code.

In the case of such a woven code, it is adequate for the correction of an error burst of length L if an interleaving of the L codes, which are capable of correcting an error, is used.

Insofar as the length of the signature (FCS) is at least as long as the number of address bits used for the signature formation, an “error burst” is reliably detected, since a signature formation with a suitable algorithm can reliably detect all error bursts with a length less than the length of the signature (FCS).

Such error bursts on the network line (3) are caused by narrowband interference and pulsed interference.

The transmission system is to make both the correction of burst errors as well as the correction of random errors possible in a single error correction means.

SUMMARY OF THE INVENTION It is an object of the invention to provide a transmission system of the type mentioned in the opening paragraph, which makes the correction of burst errors as well as the correction of random errors possible in a simple manner.

So as to render it possible to use codes which recognize or correct randomly occurring errors, which may occur in transmission over channels which are susceptible to interference and have error bursts, for example radio transmission channels, the individual code words can be interleaved bit-wise prior to transmission.

Such a transmission system makes thus a combined correction of accidental errors (random errors) and error bursts possible in a single error correction means.

The complete burst, however, is shorter than the signal frame time slot appropriated to the burst, in order to be able to equalize burst allocation errors and delay differences in the transmit channel, so that in this manner an overlapping of adjacent bursts transmitted by different mobile stations is avoided.

A global variable is introduced that contains the number of successive uninterrupted bursts received without error.

Following this the channel-coded digital bit stream is fed into a so-called “interleaver”, which alters the sequence of the data according to an algorithm which is known to the receiver so that so-called burst errors in the transmission channel do not lead to the loss of a fairly large contiguous part of the message but only to smaller short losses which are spread over a larger time interval.