Scalable Denoise-and-Forward In Bidirectional Relay Networks

Student thesis: Master thesis (including HD thesis)

  • Rasmus Krigslund
  • Jesper Hemming Sørensen
Interference is considered as the single largest limitation for wireless networks. In this project bidirectional relay networks are considered seeking to exploit the interference in an intelligent fashion, where most existing relay schemes seek to avoid it. The relay scheme DeNoise and Forward, DNF, is applied as a starting point, as it embraces interference by utilising analog network coding, where the signals are added in the wireless medium. DNF was originally presented using BPSK modulation and a simple relay scenario with two end nodes communicating through a relay node. The main focus in this project is to scale the concept of DNF in order to make it applicable in more realistic relay scenarios. A scheme based on DNF, Scalable DNF, S-DNF, has been devoloped for networks with more than two end nodes and the functionality of DNF has been extended to also enable other modulation schemes and higher order modulation. Results show good performance potential of the proposed scheme and when different modulation schemes are applied, the performance impact of S-DNF is similar to what is experienced when using the originally proposed BPSK.
Publication date2009
Number of pages118
Publishing institutionAalborg University
ID: 17634469