Dirty paper coding

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Dirty paper coding (DPC) is a coding technique that pre-cancels a known interference where it is known at the transmitter before self-data transmission. DPC achieves the link capacity without power penalty as much as a capacity with no interference regardless of interference state information knowledge at the receiver. Examples of Dirty paper coding include Costa precoding , Tomlinson-Harashima precoding and the vector perturbation technique.

Note that DPC at the encoder is an information-theoretic dual of Wyner-Ziv coding at the decoder.

Applications

Recently, DPC has been widely researched as a solution for optimizing future wireless networks. For example, it is essential to apply the DPC concept into a precoding technique for multiuser MIMO wireless networks and into an interference aware coding technique for dynamic wireless networks. One important remark for the practical use of DPC is that either DPC or a DPC-like technique requires the side information such as interference status information where interference status information includes channel state information and other user data information. Hence, to design DPC-based systems we should consider the procedure to feed the side information to the transmitter(s).

Recently, DPC has also been adopted in informed digital watermarking techniques.

See also

• Multiple-input multiple-output communications
• Advanced MIMO communications
• Precoding
• Computing
• Watermark - Digital watermarking
• Cognitive radio

References

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Last updated on Thursday March 06, 2008 at 10:39:31 PST (GMT -0800)
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