This invention is method of pre-computing the optimal pairing of antennas to RF/ analog frontends in wireless MIMO systems without the need for computationally...
This invention is method of pre-computing the optimal pairing of antennas to RF/ analog frontends in wireless MIMO systems without the need for computationally complex and power consuming searches. Other MIMO antenna selection schemes demand an exponential computational order for an exhaustive search, and slightly less for sub-optimal selection.
This new technique requires zero real-time computations and minimal memory for near-optimal anenna selection.
When mathematically expressing the computation requirements for MIMO systems, the relationship of the number of antennas in the device (N) to number of RF frontends (M) is exponential (NM) for exhaustive searches and semi-linear [(N2M) or (N4M)] for iterative/ sub-optimal searches. An antenna selection algorithm that eliminates significant computational requirements, and requires memory of a linear order, defined by the product of the number of antennas and the number of frontends. Estimating the angle spread concisely encapsulates the sources of distortion and interference as clusters. The algorithm then selects the optimal frontend-antenna pair to compensate for those clusters.