The potential link performance gain obtained with up to 8x8 MIMO transmission as standardized in 3GPP LTE Release 10 have been evaluated in an indoor measurement campaign using a testbed implementation. For well-separated antennas, the result show increasing downlink throughput when increasing the number of transmit and receive antennas, up to a median throughput of 335 Mbps for an 8x8 MIMO configuration on a 20 MHz carrier. A similar and only slightly smaller throughput is achieved when using a compact UE array of a size that is more reasonable for a consumer device implementation.
Karl Werner, Henrik Asplund, Daniel V.P. Figueiredo, Niklas Jaldén and Björn Halvarsson