Dirty Paper Coding using Sign-bit Shaping and LDPC Codes

Dirty paper coding (DPC) refers to methods for pre-subtraction of known interference at the transmitter of a multiuser communication system. There are numerous applications for DPC, including coding for broadcast channels. Recently, lattice-based coding techniques have provided several designs for DPC. In lattice-based DPC, there are two codes - a convolutional code that defines a lattice used for shaping and an error correction code used for channel coding. Several specific designs have been reported in the recent literature using convolutional and graph-based codes for capacity-approaching shaping and coding gains. In most of the reported designs, either the encoder works on a joint trellis of shaping and channel codes or the decoder requires iterations between the shaping and channel decoders. This results in high complexity of implementation. In this work, we present a lattice-based DPC scheme that provides good shaping and coding gains with moderate complexity at both the encoder ...

• Type: Journal
• Year: 2010
• Where: CORR
• Authors: G. Shilpa, Andrew Thangaraj, Srikrishna Bhashyam
• Keywords: Convolutional Code, CORR 2010, Education, Lattice-based Coding Techniques, Lattice-based Dpc