Review Article
A Survey on Beamforming Techniques for Wireless MIMO Relay Networks
Table 2
Classification of articles based on network topology, the optimization target with the corresponding power constraint, and the relaying topology.
| | Reference article | Network topology | Optimization target | Power constraint | Relaying topology |
| | [21] | Single-user | MSE, SINR, Capacity | Relay (total), receiver (interference level) | Multirelay | | [22] | Single-user | MSE | Relay (sum-power) | Multirelay | | [23] | Single-user | MSE | Relay | Single-relay | | [24] | Single-user | MSE | Source-relay (separate) | Single-relay | | [25] | Single-user | MSE | Source-relay (separate) | Single-relay | | [26] | Multiuser | MSE | Source-relay (separate) | Single-relay | | [27] | Two-way multipair | MSE | Relay | Single-relay | | [28] | Two-way multipair | MSE, SINR | Relay | Single-relay | | [29] | Two-way single-pair | MSE | Sources-relay (separate and individual) | Single-relay | | [30] | Two-way single-pair | MSE | Sources-relays (separate and individual) | Relay selection | | [31] | Two-way single-pair | MSE | Sources-relay (separate and individual) | Single-relay | | [32] | Two-way single-pair | MSE | Sources (individual)-relays (sum-power) | Multirelay | | [33] | Single-user | SNR | Source-relay (joint) | Multirelay | | [61] | Single-user | SNR | Source (individual)-relay (total), relay (joint and individual) | Multirelay | | [34] | Single-user | SNR | Source-relay (separate) | Single-relay | | [35] | Single-user | SNR | Source-relay individual | Relay selection | | [36] | Single-user | SNR | Source-(selected) relay (separate) | Relay selection | | [37] | Single-user | SNR | Relay | Relay selection | | [38] | Multiuser | SNR | Source-relay (joint) | Single-relay | | [39] | Multiuser | SNR | Source-relay (joint) | Single-relay | | [40] | Multiuser | SINR | Relay | Single-relay | | [41] | Two-way multipair | SINR | Sources-relay (separate and individual) | Single-relay | | [42] | Multiuser | SINR | Relay (individual), receiver (interference level) | Multirelay | | [43] | Multiuser | SINR | Relay (sum-power) | Multirelay | | [44] | Single-user | Capacity | Relay (sum-power) | Multirelay | | [45] | Single-user | Capacity | Relay | Single-relay | | [46] | Single-user | Capacity | Relay | Relay selection | | [47] | Single-user | Capacity | Sources-relays (separate sum-power) | Relay selection | | [48] | Multiuser | Capacity | Source-relay (separate) | Single-relay | | [49] | Multiuser | Capacity | Source-relay (separate) | Single-relay | | [50] | Multiuser | Capacity | Sources-relays (separate sum-power) | Multirelay | | [51] | Two-way multipair | Capacity | Relay | Multirelay | | [52] | Two-way multipair | Capacity | Relay | Single-relay | | [53] | Two-way single-pair | Capacity | Sources-relay (separate and individual) | Single-relay | | [54] | Two-way single pair | Capacity | Sources-relay (separate and individual) | Single-relay | | [55] | Multiuser | Capacity | Sources (individual)-relays (individual) | Multirelay | | [56] | Multiuser | Capacity | Relays (sum-power) | Multirelay | | [57] | Multiuser | Capacity | Receiver (interference levels) | Multirelay | | [58] | Two-way single-pair | Minimum symbol distance | Sources-relay (separate and individual) | Single-relay | | [59] | Two-way multipair | Minimum symbol distance | Sources-relay (separate and individual) | Single-relay |
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