Patent ID: 6473467
Filing Date: 2002-10-29
Classification: H04B,H04L,H04W

Abstract:
A method for measuring and reporting transmission characteristics of a multiple input/multiple output communication system, comprising:assigning a first subset of sub-channels of a plurality of sub-channels to a first transmit antenna of a plurality of transmit antennas of a first transmitter unit, wherein the sub-channels of the first subset of sub-channels are noncontiguous; transmitting, by the first transmit antenna, a first pilot symbol over the sub-channels of the first subset of sub-channels; receiving, by a first receive antenna of a first receiver unit, the first pilot symbol; determining, from the received first pilot symbol, the transmission characteristics of the sub-channels of the first subset of sub-channels; reporting, by the first receiver unit to the first transmitter unit, an information signal that carries the determined transmission characteristics for the sub-channels of the first subset of sub-channels; and optimizing a set of transmission parameters at the first transmitter unit, based on the information signal.