초록 ▼

Channel state information (CSI) can be used by a communications system to precondition transmissions between transmitter units and receiver units. In one aspect of the invention, disjoint sub-channel sets are assigned to transmit antennas located at a transmitter unit. Pilot symbols are generated an

Channel state information (CSI) can be used by a communications system to precondition transmissions between transmitter units and receiver units. In one aspect of the invention, disjoint sub-channel sets are assigned to transmit antennas located at a transmitter unit. Pilot symbols are generated and transmitted on a subset of the disjoint sub-channels. Upon receipt of the transmitted pilot symbols, the receiver units determine the CSI for the disjoint sub-channels that carried pilot symbols. These CSI values are reported to the transmitter unit, which will use these CSI values to generate CSI estimates for the disjoint sub-channels that did not carry pilot symbols. The amount of information necessary to report CSI on the reverse link can be further minimized through compression techniques and resource allocation techniques.

대표청구항 ▼

1. 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 uni

1. 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.