| 摘要 |
Disclosed is a wireless receiver and feedback method for reducing the amount of CQI feedback in a MIMO channel. A channel estimation unit (103) uses a received pilot signal to estimate the channel matrix for each RB between respective transceiver antennas, and then performs eigenvalue decomposition of the estimated channel matrix to find eigenvalues and eigenvectors. A feedback data generator (104) is provided with a feedback bit table that correlates the number of quantized bits for the averaged CQI to be transmitted for each eigenvalue and the number of quantized bits for the CQI in each RB, and then reduces the number of quantized bits for the averaged CQI Xk commensurate with the magnitude of the eigenvalue number k. The feedback data generator (104) averages eigenvalues found by the channel estimator (103) for each RB, converts the averaged eigenvalue to a CQI for each eigenvalue number, and generates feedback data from the CQI for each eigenvalue with the number of quantized bits according to the feedback table.
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