Rate-Distortion Properties of Single-Layer Quantize-and-Forward for   Two-Way Relaying
  The Quantize & Forward (QF) scheme for two-way relaying is studied with a focus on its rate-distortion properties. A sum rate maximization problem is formulated and the associated quantizer optimization problem is investigated. An algorithm to approximately solve the problem is proposed. Under certain cases scalar quantizers maximize the sum rate. 
Michael Heindlmaier, Onurcan Iscan
cs.IT math.IT