Burst Errors



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tarix16.03.2017
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Burst Errors

  • Burst errors are very common, in particular in wireless environments where a fade will affect a group of bits in transit. The length of the burst is dependent on the duration of the fade.

  • One way to counter burst errors, is to break up a transmission into shorter words and create a block (one word per row), then have a parity check per word.

  • The words are then sent column by column. When a burst error occurs, it will affect 1 bit in several words as the transmission is read back into the block format and each word is checked individually.























Using Polynomials

  • We can use a polynomial to represent a binary word.

  • Each bit from right to left is mapped onto a power term.

  • The rightmost bit represents the “0” power term. The bit next to it the “1” power term, etc.

  • If the bit is of value zero, the power term is deleted from the expression.



























































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