| 12 | 12 | Our test setup is a 2 x 2 three node cooperative system. A total of three WARP boards are connected to a host computer through an Ethernet switch. Experiments are conducted using an Azimuth ACE 400 WB wireless channel emulator. The emulator can support up to a 4 x 4 setup, and has four inputs and four outputs and 16 bidirectional links. For the 2 x 2 full MIMO relay setup, we use 2 inputs, 4 outputs and 12 paths. For the first time slot, we designate one node as the source, one node as the relay, and one node as the destination. Four forward links are used to connect the source node to the relay node. Similarly, four other links are used to connect the source node to the destination node. Since all processing is done at the host computer, we can use the reverse link (which can be independent from the forward link) for the relay to destination link. We designate one node as the relay and one node as the destination and connect the two nodes with four reverse links. |
