OPEN LOOP MIMO MODE FOR LTE-A UPLINK

摘要

A precoding scheme to accommodate user equipment (UEs) having higher Doppler speeds. In such transmission schemes, a different precoding matrix is applied to each orthogonal frequency division multiplex (OFDM) symbol in the transmission stream. Additionally, a downlink control message format is defined to handle assignment of multiple different transmission schemes using the same message format. The downlink control message format includes a control element in one of the message fields along with a set of parameters specifically applicable to the assigned transmission scheme. Based on the value of this control element, the UE sets the specific transmission scheme and determines a set of interpretation rules uniquely associated with that transmission scheme. Using the interpretation rules, the UE is able to read the set of parameters as applied to the selected transmission scheme.

主权项

1. A method of precoding a plurality of orthogonal frequency division multiplex (OFDM) symbols in an uplink transmission stream, comprising:
assigning a first precoding matrix to a first OFDM symbol; and assigning a second precoding matrix to a second OFDM symbol, the second precoding matrix being different from the first precoding matrix.