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Dirty paper coding (DPC) is a technique used in telecommunication systems to send digital data on a channel that is undergoing or is subject to interference. DPC was conceived by Max Costa in 1983. It gets it name from the notion that when paper is used to send a message, it gets dirtier the more times it's passed on, making it impossible to read by the time it reaches the intended recipient.
DPC primarily helps transmit data efficiently even if the communication channel has interference. Its objective is to send as much readable information on a channel with interference as possible. DPC works by precoding the data so that it becomes less vulnerable to interference. The precoding is known to both the sender and the receiver. It is used in wireless networks to evaluate the interference level a message can face when being broadcast on a wireless channel.
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