A General Detection Method for Linear Constructed Distributed Space-Time Codes in Amplify-and-Forward Mode of Wireless Cooperation Networks

This paper presents a general detection method for linearly constructed distributed space-time codes (DSTC) in amplify-and-forward (AF) mode of wireless cooperation networks. A two-phase model for the network is utilized. In the first phase, multiple-antenna transmit nodes send signals simultaneously. Then the relays encode received signals with linearly constructed DSTC. Since linear dispersion (LD) codes subsume all linearly constructed STCs as special cases, when such DSTCs are used in AF mode of the network, a LD equivalent system model which is similar to V-BLAST structure is given in this paper. Thus, detection algorithms for V-BLAST can be utilized for the model effectively. Especially, linear complexity detection algorithms can be used in the network for practical implementations. Simulation results prove the LD equivalent model valid at last.