Patent ID: 9300374
Filing Date: 2016-03-29
CPC Classification: H04B,H04L

Claim Text:
1. A method in a communication terminal for determining rank indication in a multicarrier communication system, wherein communication in the multicarrier communication system is carried out over a plurality of subcarriers, wherein the communication terminal communicates with an interface station within a cell in a multiple-input-multiple-output (MIMO) configuration, the method comprising: receiving multicarrier symbols, the multicarrier symbols including pilot signals from the interface station, wherein the pilot signals contain pilot data; estimating channel properties based on the received multicarrier symbols, wherein the channel properties include channel properties of at least one subcarrier carrying one of the pilot signals; equalizing the pilot data based on the channel properties; determining at least one pilot power and at least one interference power based on the equalized pilot data; computing at least one power ratio between the at least one pilot power and the at least one interference power; and generating the rank indication by comparing the at least one power ratio to a threshold value.