Topology-Aware Modulation and Error-Correction Coding for Cooperative Networks
User cooperation in wireless networks is inherently a cross-layer optimization problem. The authors identify a new direction for cooperative communications: i.e., in addition to the point-to-point communication channel between the transmitter and the receiver, the communication configuration should take the network topology into account. In this paper, they first propose a Network Modulation (NM) design that can transmit bits with different SNR requirements in a single symbol transmission. They then propose an Error-correction coding Assisted Relay (EAR) scheme that is also configured according to the network topology. They study the performance of NM and EAR in both a three-node collinear network and a two-dimensional cellular network.