Patent ID: 7830977
Filing Date: 2010-11-09
Classification: H04B,H04L

Abstract:
1. A method comprising transmitting by a receiver station, to a transmitter station, a first channel quality indicator (CQI) to indicate to the transmitter station a first modulation level and a common code rate, the first modulation level for use by the transmitter station to transmit a first stream of signals to the receiver station, and the common code rate for use by the transmitter station to transmit the first and k−1 additional streams of signals to the receiver station, where k is an integer greater than 1; transmitting by the receiver station, to the transmitter station, k−1 additional CQI to indicate to the transmitter station k−1 modulation levels for use by the transmitter station to transmit the k−1 additional streams of signals to the receiver station respectively; and directly or indirectly informing the transmitter station an order of a plurality of spatial channels with respect to qualities of the plurality of spatial channels relative to each other; wherein a second CQI of the k−1 additional CQI has a data size of 1 bit to indicate to the transmitter station whether to use a same or a lower modulation level as the first modulation level or a modulation level indicated by a third CQI of the k−1 additional CQI; wherein the second CQI is associated with a corresponding quality ordered spatial channel that immediately succeeds another quality ordered spatial channel associated with the first CQI or the third CQI.