Efficient wireless network deployment by cognitive transceivers with multimodal pilot-use modems

In this paper, we develop new cognitive antenna-array transceivers with a multimodal modem that, according to channel conditions, exploits the pilot signal differently yet optimally for improved adaptive channel identification and data combining. This new concept allows better throughput optimization of wireless networks while reducing the Tx pilot power at the BS. By keeping the Tx pilot power unchanged at the BS, this increased power efficiency can alternatively translate into an increased cell-size coverage, i.e., in a reduced deployment cost with relatively less BSs in a given area.