Patent ID: 7630732
Filing Date: 2009-12-08
Classification: H01Q

Abstract:
1. A receiver for generating feedback for transmit power control, the receiver comprising: a channel estimator configured to generate a channel response matrix from a received signal; a channel matrix decomposition unit configured to decompose the channel response matrix to calculate eigenvalues associated with each of multiple-input multiple-output (MIMO) channels; an eigenvalue processor configured to calculate a transmit power level for each of the MIMO channels from the respective eigenvalues; a power control bit generator configured to generate a power control bit for each of the MIMO channels from the respective transmit power levels; and a channel condition monitor configured to monitor channel condition and to dynamically switch a type of feedback dependent on the channel condition, the feedback type being one of the eigenvalues, the transmit power levels and the power control bits, wherein a different feedback type is selected as the channel condition changes.