Dirty paper coding schemes for MIMO broadcast channels

Samson Lasaulce (1) , J. Dumont (2) , Reza Khani (1) , Raphaël Visoz (2)

1 L2S - Laboratoire des signaux et systèmes
2 Orange Labs R&D [Rennes]

In this paper we propose several dirty paper coding schemes for the broadcast channel when both the transmitter and receivers are equipped with multiple antennas. These coding schemes are based on channel state information at the transmitter and inspired from information-theoretic concepts. The proposed end-to-end algorithms allows us to evaluate the performance of the broadcast channel in terms of bit error rates and not in terms of coding rates as it is usually the case in the corresponding literature. Different inner coding schemes such as the ZF-DPC and MMSE-DPC and different outer coding schemes such as the THS, SCS and TCQ are compared and discussed. We also consider the DPC idea as a way of implementing a multiple access scheme. In this respect it is compared with the well-know TDMA scheme. Sometimes our conclusions show quite surprising results in comparison to what is expected by pure information-theoretic considerations.

Mots clés: nested lattices; Broadacst channel; MIMO; dirty paper coding; ZF-DPC; MMSE-DPC; TCQ; nested lattices.

Domaines: Théorie de l'information [cs.IT]; Théorie de l'information et codage [math.IT]

Samson Lasaulce, J. Dumont, Reza Khani, Raphaël Visoz. Dirty paper coding schemes for MIMO broadcast channels. 2007. ⟨hal-00446277⟩