ANTENNA ARRANGEMENT FOR MULTI-INPUT MULTI-OUTPUT WIRELESS LOCAL AREA NETWORK

摘要

Line-of-sight and non-line-of-sight channel conditions are efficiently and optimally handled in a MIMO wireless network by coupling two or more dual polarization antennas together through a controller that selects a prescribed combination of antenna outputs in response to determination of the existence of a particular channel condition. In this manner, the controlled antenna array develops a suitable level of signal discrimination (decorrelation), whether or not the channel condition provides it. In one embodiment, two dual polarized antennas are separated from each other and have their dual polarization output signals coupled to the same switching element so that the orthogonal outputs from an antenna are available at the same switching element. A controller selects a particularly polarized output signal from each antenna based on a predetermined criterion.