Content deleted Content added
No edit summary |
ClueBot NG (talk | contribs) m Reverting possible vandalism by 41.130.238.14 to version by Chemako0606. False positive? Report it. Thanks, ClueBot NG. (410114) (Bot) |
||
Line 2:
In [[coding theory]], '''puncturing''' is the process of removing some of the parity bits after encoding with an [[error correction and detection|error-correction code]]. This has the same effect as encoding with an error-correction code with a higher rate, or less redundancy. However, with puncturing the same decoder can be used regardless of how many bits have been punctured, thus puncturing considerably increases the flexibility of the system without significantly increasing its complexity.
In some cases, a pre-defined pattern of puncturing is used in an encoder. Then, the inverse operation, known as depuncturing, is implemented by the decoder.
Puncturing is used in [[UMTS]] during the rate matching process. It is also used in [[Wifi]], [[GPRS]] and [[EDGE]], as well as in the [[DVB-T]] and [[Digital Radio Mondiale|DRM]] Standards.
| |||