Talk:Randomizer
Add topicLatest comment: 16 years ago by Eyreland in topic Randomizers vs Interleavers
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Randomizers vs Interleavers
[edit]In telecommunications, both Randomizers and Interleavers are used. Interleaving is used in digital data transmission technology to protect the transmission against burst errors. These errors overwrite a lot of bits in a row, so a typical error correction scheme that expects errors to be more uniformly distributed can be overwhelmed. Interleaving is used to help stop this from happening.
However, Interleavers are not Randomizers.
- Interleavers do not alter data, that is to say the data retains the same original number of 1's and 0's it had before it entered the interleaver.
- Randomizers suppress excess DC components in data, an Interleaver can not do this.
- Sometimes, in order to achive optimal signal to noise ratios using an interleaver and a randomizer is necessary.
- The CCSDS Space Communications Protocols recommend using both an interleaver and a randomizer to protect the integrity of the downlink.
- Interleavers create measurable and predictable time delays in the processing of data but randomizers also create delays but generally of a magnitude less than interleavers.
This needs to be added to make the article more readable. Eyreland (talk) 12:02, 12 February 2010 (UTC)