Coded Cooperation for Ad Hoc Networks With Spatial Multiplexing
In this paper the authors design a network based on cooperative spatial multiplexing (SM), capable to adaptively support terminals with multiple antennas and multiple cooperating nodes. The authors' proposal overcomes limitations of existing cooperative networks based on Space-Time Block Codes (STBC), i.e., their need for symbol synchronization and signaling overhead for cooperation setup. Furthermore, the presented cooperation scheme is designed with the aim of improving the overall network performance, while most of the proposals in the literature focus on single link performance. SM is integrated with decision-feedback multiuser receivers for both the non-cooperative and the cooperative phases in order to maximize the use of radio resources.